node_modules updated, buefy add to lib folder

node_modules/mongoose/lib/helpers/common.js

@@ -0,0 +1,89 @@
+'use strict';
+
+/*!
+ * Module dependencies.
+ */
+
+const Decimal128 = require('../types/decimal128');
+const ObjectId = require('../types/objectid');
+const utils = require('../utils');
+
+exports.flatten = flatten;
+exports.modifiedPaths = modifiedPaths;
+
+/*!
+ * ignore
+ */
+
+function flatten(update, path, options) {
+  let keys;
+  if (update && utils.isMongooseObject(update) && !Buffer.isBuffer(update)) {
+    keys = Object.keys(update.toObject({ transform: false, virtuals: false }));
+  } else {
+    keys = Object.keys(update || {});
+  }
+
+  const numKeys = keys.length;
+  const result = {};
+  path = path ? path + '.' : '';
+
+  for (let i = 0; i < numKeys; ++i) {
+    const key = keys[i];
+    const val = update[key];
+    result[path + key] = val;
+    if (shouldFlatten(val)) {
+      if (options && options.skipArrays && Array.isArray(val)) {
+        continue;
+      }
+      const flat = flatten(val, path + key, options);
+      for (const k in flat) {
+        result[k] = flat[k];
+      }
+      if (Array.isArray(val)) {
+        result[path + key] = val;
+      }
+    }
+  }
+
+  return result;
+}
+
+/*!
+ * ignore
+ */
+
+function modifiedPaths(update, path, result) {
+  const keys = Object.keys(update || {});
+  const numKeys = keys.length;
+  result = result || {};
+  path = path ? path + '.' : '';
+
+  for (let i = 0; i < numKeys; ++i) {
+    const key = keys[i];
+    let val = update[key];
+
+    result[path + key] = true;
+    if (utils.isMongooseObject(val) && !Buffer.isBuffer(val)) {
+      val = val.toObject({ transform: false, virtuals: false });
+    }
+    if (shouldFlatten(val)) {
+      modifiedPaths(val, path + key, result);
+    }
+  }
+
+  return result;
+}
+
+/*!
+ * ignore
+ */
+
+function shouldFlatten(val) {
+  return val &&
+    typeof val === 'object' &&
+    !(val instanceof Date) &&
+    !(val instanceof ObjectId) &&
+    (!Array.isArray(val) || val.length > 0) &&
+    !(val instanceof Buffer) &&
+    !(val instanceof Decimal128);
+}

node_modules/mongoose/lib/helpers/cursor/eachAsync.js

@@ -0,0 +1,71 @@
+'use strict';
+
+/*!
+ * Module dependencies.
+ */
+
+const async = require('async');
+const utils = require('../../utils');
+
+/**
+ * Execute `fn` for every document in the cursor. If `fn` returns a promise,
+ * will wait for the promise to resolve before iterating on to the next one.
+ * Returns a promise that resolves when done.
+ *
+ * @param {Function} next the thunk to call to get the next document
+ * @param {Function} fn
+ * @param {Object} options
+ * @param {Function} [callback] executed when all docs have been processed
+ * @return {Promise}
+ * @api public
+ * @method eachAsync
+ */
+
+module.exports = function eachAsync(next, fn, options, callback) {
+  const parallel = options.parallel || 1;
+
+  const handleNextResult = function(doc, callback) {
+    const promise = fn(doc);
+    if (promise && typeof promise.then === 'function') {
+      promise.then(
+        function() { callback(null); },
+        function(error) { callback(error || new Error('`eachAsync()` promise rejected without error')); });
+    } else {
+      callback(null);
+    }
+  };
+
+  const iterate = function(callback) {
+    let drained = false;
+    const nextQueue = async.queue(function(task, cb) {
+      if (drained) return cb();
+      next(function(err, doc) {
+        if (err) return cb(err);
+        if (!doc) drained = true;
+        cb(null, doc);
+      });
+    }, 1);
+
+    const getAndRun = function(cb) {
+      nextQueue.push({}, function(err, doc) {
+        if (err) return cb(err);
+        if (!doc) return cb();
+        handleNextResult(doc, function(err) {
+          if (err) return cb(err);
+          // Make sure to clear the stack re: gh-4697
+          setTimeout(function() {
+            getAndRun(cb);
+          }, 0);
+        });
+      });
+    };
+
+    async.times(parallel, function(n, cb) {
+      getAndRun(cb);
+    }, callback);
+  };
+
+  return utils.promiseOrCallback(callback, cb => {
+    iterate(cb);
+  });
+};

node_modules/mongoose/lib/helpers/discriminator/checkEmbeddedDiscriminatorKeyProjection.js

@@ -0,0 +1,12 @@
+'use strict';
+
+module.exports = function checkEmbeddedDiscriminatorKeyProjection(userProjection, path, schema, selected, addedPaths) {
+  const userProjectedInPath = Object.keys(userProjection).
+    reduce((cur, key) => cur || key.startsWith(path + '.'), false);
+  const _discriminatorKey = path + '.' + schema.options.discriminatorKey;
+  if (!userProjectedInPath &&
+      addedPaths.length === 1 &&
+      addedPaths[0] === _discriminatorKey) {
+    selected.splice(selected.indexOf(_discriminatorKey), 1);
+  }
+};

node_modules/mongoose/lib/helpers/document/cleanModifiedSubpaths.js

@@ -0,0 +1,28 @@
+'use strict';
+
+/*!
+ * ignore
+ */
+
+module.exports = function cleanModifiedSubpaths(doc, path, options) {
+  options = options || {};
+  const skipDocArrays = options.skipDocArrays;
+
+  let deleted = 0;
+  if (!doc) {
+    return deleted;
+  }
+  for (const modifiedPath of Object.keys(doc.$__.activePaths.states.modify)) {
+    if (skipDocArrays) {
+      const schemaType = doc.schema.path(modifiedPath);
+      if (schemaType && schemaType.$isMongooseDocumentArray) {
+        continue;
+      }
+    }
+    if (modifiedPath.indexOf(path + '.') === 0) {
+      delete doc.$__.activePaths.states.modify[modifiedPath];
+      ++deleted;
+    }
+  }
+  return deleted;
+};

node_modules/mongoose/lib/helpers/document/compile.js

@@ -0,0 +1,162 @@
+'use strict';
+
+const get = require('../../helpers/get');
+const getSymbol = require('../../helpers/symbols').getSymbol;
+const utils = require('../../utils');
+
+let Document;
+
+/*!
+ * exports
+ */
+
+exports.compile = compile;
+exports.defineKey = defineKey;
+
+/*!
+ * Compiles schemas.
+ */
+
+function compile(tree, proto, prefix, options) {
+  Document = Document || require('../../document');
+  const keys = Object.keys(tree);
+  const len = keys.length;
+  let limb;
+  let key;
+
+  for (let i = 0; i < len; ++i) {
+    key = keys[i];
+    limb = tree[key];
+
+    const hasSubprops = utils.isPOJO(limb) && Object.keys(limb).length &&
+      (!limb[options.typeKey] || (options.typeKey === 'type' && limb.type.type));
+    const subprops = hasSubprops ? limb : null;
+
+    defineKey(key, subprops, proto, prefix, keys, options);
+  }
+}
+
+/*!
+ * Defines the accessor named prop on the incoming prototype.
+ */
+
+function defineKey(prop, subprops, prototype, prefix, keys, options) {
+  Document = Document || require('../../document');
+  const path = (prefix ? prefix + '.' : '') + prop;
+  prefix = prefix || '';
+
+  if (subprops) {
+    Object.defineProperty(prototype, prop, {
+      enumerable: true,
+      configurable: true,
+      get: function() {
+        const _this = this;
+        if (!this.$__.getters) {
+          this.$__.getters = {};
+        }
+
+        if (!this.$__.getters[path]) {
+          const nested = Object.create(Document.prototype, getOwnPropertyDescriptors(this));
+
+          // save scope for nested getters/setters
+          if (!prefix) {
+            nested.$__.scope = this;
+          }
+          nested.$__.nestedPath = path;
+
+          Object.defineProperty(nested, 'schema', {
+            enumerable: false,
+            configurable: true,
+            writable: false,
+            value: prototype.schema
+          });
+
+          Object.defineProperty(nested, 'toObject', {
+            enumerable: false,
+            configurable: true,
+            writable: false,
+            value: function() {
+              return utils.clone(_this.get(path, null, {
+                virtuals: get(this, 'schema.options.toObject.virtuals', null)
+              }));
+            }
+          });
+
+          Object.defineProperty(nested, 'toJSON', {
+            enumerable: false,
+            configurable: true,
+            writable: false,
+            value: function() {
+              return _this.get(path, null, {
+                virtuals: get(_this, 'schema.options.toJSON.virtuals', null)
+              });
+            }
+          });
+
+          Object.defineProperty(nested, '$__isNested', {
+            enumerable: false,
+            configurable: true,
+            writable: false,
+            value: true
+          });
+
+          const _isEmptyOptions = Object.freeze({
+            minimize: true,
+            virtuals: false,
+            getters: false,
+            transform: false
+          });
+          Object.defineProperty(nested, '$isEmpty', {
+            enumerable: false,
+            configurable: true,
+            writable: false,
+            value: function() {
+              return Object.keys(this.get(path, null, _isEmptyOptions) || {}).length === 0;
+            }
+          });
+
+          compile(subprops, nested, path, options);
+          this.$__.getters[path] = nested;
+        }
+
+        return this.$__.getters[path];
+      },
+      set: function(v) {
+        if (v instanceof Document) {
+          v = v.toObject({ transform: false });
+        }
+        const doc = this.$__.scope || this;
+        return doc.$set(path, v);
+      }
+    });
+  } else {
+    Object.defineProperty(prototype, prop, {
+      enumerable: true,
+      configurable: true,
+      get: function() {
+        return this[getSymbol].call(this.$__.scope || this, path);
+      },
+      set: function(v) {
+        return this.$set.call(this.$__.scope || this, path, v);
+      }
+    });
+  }
+}
+
+// gets descriptors for all properties of `object`
+// makes all properties non-enumerable to match previous behavior to #2211
+function getOwnPropertyDescriptors(object) {
+  const result = {};
+
+  Object.getOwnPropertyNames(object).forEach(function(key) {
+    result[key] = Object.getOwnPropertyDescriptor(object, key);
+    // Assume these are schema paths, ignore them re: #5470
+    if (result[key].get) {
+      delete result[key];
+      return;
+    }
+    result[key].enumerable = ['isNew', '$__', 'errors', '_doc', '$locals'].indexOf(key) === -1;
+  });
+
+  return result;
+}

node_modules/mongoose/lib/helpers/document/getEmbeddedDiscriminatorPath.js

@@ -0,0 +1,43 @@
+'use strict';
+
+const get = require('../get');
+
+/*!
+ * Like `schema.path()`, except with a document, because impossible to
+ * determine path type without knowing the embedded discriminator key.
+ */
+
+module.exports = function getEmbeddedDiscriminatorPath(doc, path, options) {
+  options = options || {};
+  const typeOnly = options.typeOnly;
+  const parts = path.split('.');
+  let schema = null;
+  let type = 'adhocOrUndefined';
+
+  for (let i = 0; i < parts.length; ++i) {
+    const subpath = parts.slice(0, i + 1).join('.');
+    schema = doc.schema.path(subpath);
+    if (schema == null) {
+      type = 'adhocOrUndefined';
+      continue;
+    }
+    if (schema.instance === 'Mixed') {
+      return typeOnly ? 'real' : schema;
+    }
+    type = doc.schema.pathType(subpath);
+    if ((schema.$isSingleNested || schema.$isMongooseDocumentArrayElement) &&
+        schema.schema.discriminators != null) {
+      const discriminators = schema.schema.discriminators;
+      const discriminatorKey = doc.get(subpath + '.' +
+        get(schema, 'schema.options.discriminatorKey'));
+      if (discriminatorKey == null || discriminators[discriminatorKey] == null) {
+        continue;
+      }
+      const rest = parts.slice(i + 1).join('.');
+      return getEmbeddedDiscriminatorPath(doc.get(subpath), rest, options);
+    }
+  }
+
+  // Are we getting the whole schema or just the type, 'real', 'nested', etc.
+  return typeOnly ? type : schema;
+};

node_modules/mongoose/lib/helpers/get.js

@@ -0,0 +1,39 @@
+'use strict';
+
+/*!
+ * Simplified lodash.get to work around the annoying null quirk. See:
+ * https://github.com/lodash/lodash/issues/3659
+ */
+
+module.exports = function get(obj, path, def) {
+  const parts = path.split('.');
+  let rest = path;
+  let cur = obj;
+  for (const part of parts) {
+    if (cur == null) {
+      return def;
+    }
+
+    // `lib/cast.js` depends on being able to get dotted paths in updates,
+    // like `{ $set: { 'a.b': 42 } }`
+    if (cur[rest] != null) {
+      return cur[rest];
+    }
+
+    cur = getProperty(cur, part);
+
+    rest = rest.substr(part.length + 1);
+  }
+
+  return cur == null ? def : cur;
+};
+
+function getProperty(obj, prop) {
+  if (obj == null) {
+    return obj;
+  }
+  if (obj instanceof Map) {
+    return obj.get(prop);
+  }
+  return obj[prop];
+}

node_modules/mongoose/lib/helpers/immediate.js

@@ -0,0 +1,12 @@
+/*!
+ * Centralize this so we can more easily work around issues with people
+ * stubbing out `process.nextTick()` in tests using sinon:
+ * https://github.com/sinonjs/lolex#automatically-incrementing-mocked-time
+ * See gh-6074
+ */
+
+'use strict';
+
+module.exports = function immediate(cb) {
+  return process.nextTick(cb);
+};

node_modules/mongoose/lib/helpers/model/applyHooks.js

@@ -14,6 +14,7 @@ module.exports = applyHooks;
  */
 
 applyHooks.middlewareFunctions = [
+  'deleteOne',
   'save',
   'validate',
   'remove',
@@ -40,12 +41,22 @@ function applyHooks(model, schema, options) {
   const objToDecorate = options.decorateDoc ? model : model.prototype;
 
   model.$appliedHooks = true;
-  for (let i = 0; i < schema.childSchemas.length; ++i) {
-    const childModel = schema.childSchemas[i].model;
+  for (const key of Object.keys(schema.paths)) {
+    const type = schema.paths[key];
+    let childModel = null;
+    if (type.$isSingleNested) {
+      childModel = type.caster;
+    } else if (type.$isMongooseDocumentArray) {
+      childModel = type.Constructor;
+    } else {
+      continue;
+    }
+
     if (childModel.$appliedHooks) {
       continue;
     }
-    applyHooks(childModel, schema.childSchemas[i].schema, options);
+
+    applyHooks(childModel, type.schema, options);
     if (childModel.discriminators != null) {
       const keys = Object.keys(childModel.discriminators);
       for (let j = 0; j < keys.length; ++j) {
@@ -61,7 +72,7 @@ function applyHooks(model, schema, options) {
 
   const middleware = schema.s.hooks.
     filter(hook => {
-      if (hook.name === 'updateOne') {
+      if (hook.name === 'updateOne' || hook.name === 'deleteOne') {
         return !!hook['document'];
       }
       if (hook.name === 'remove') {
@@ -86,6 +97,8 @@ function applyHooks(model, schema, options) {
     createWrapper('validate', objToDecorate.$__validate, null, kareemOptions);
   objToDecorate.$__remove = middleware.
     createWrapper('remove', objToDecorate.$__remove, null, kareemOptions);
+  objToDecorate.$__deleteOne = middleware.
+    createWrapper('deleteOne', objToDecorate.$__deleteOne, null, kareemOptions);
   objToDecorate.$__init = middleware.
     createWrapperSync('init', objToDecorate.$__init, null, kareemOptions);
 

node_modules/mongoose/lib/helpers/model/applyMethods.js

@@ -0,0 +1,56 @@
+'use strict';
+
+const get = require('../get');
+
+/*!
+ * Register methods for this model
+ *
+ * @param {Model} model
+ * @param {Schema} schema
+ */
+
+module.exports = function applyMethods(model, schema) {
+  function apply(method, schema) {
+    Object.defineProperty(model.prototype, method, {
+      get: function() {
+        const h = {};
+        for (const k in schema.methods[method]) {
+          h[k] = schema.methods[method][k].bind(this);
+        }
+        return h;
+      },
+      configurable: true
+    });
+  }
+  for (const method of Object.keys(schema.methods)) {
+    const fn = schema.methods[method];
+    if (schema.tree.hasOwnProperty(method)) {
+      throw new Error('You have a method and a property in your schema both ' +
+        'named "' + method + '"');
+    }
+    if (schema.reserved[method] &&
+        !get(schema, `methodOptions.${method}.suppressWarning`, false)) {
+      console.warn(`mongoose: the method name "${method}" is used by mongoose ` +
+        'internally, overwriting it may cause bugs. If you\'re sure you know ' +
+        'what you\'re doing, you can suppress this error by using ' +
+        `\`schema.method('${method}', fn, { suppressWarning: true })\`.`);
+    }
+    if (typeof fn === 'function') {
+      model.prototype[method] = fn;
+    } else {
+      apply(method, schema);
+    }
+  }
+
+  // Recursively call `applyMethods()` on child schemas
+  model.$appliedMethods = true;
+  for (const key of Object.keys(schema.paths)) {
+    const type = schema.paths[key];
+    if (type.$isSingleNested && !type.caster.$appliedMethods) {
+      applyMethods(type.caster, type.schema);
+    }
+    if (type.$isMongooseDocumentArray && !type.Constructor.$appliedMethods) {
+      applyMethods(type.Constructor, type.schema);
+    }
+  }
+};

node_modules/mongoose/lib/helpers/model/applyStaticHooks.js

@@ -0,0 +1,61 @@
+'use strict';
+
+const utils = require('../../utils');
+
+module.exports = function applyStaticHooks(model, hooks, statics) {
+  const kareemOptions = {
+    useErrorHandlers: true,
+    numCallbackParams: 1
+  };
+
+  hooks = hooks.filter(hook => hook.model !== false);
+
+  model.$__insertMany = hooks.createWrapper('insertMany',
+    model.$__insertMany, model, kareemOptions);
+
+  for (const key of Object.keys(statics)) {
+    if (hooks.hasHooks(key)) {
+      const original = model[key];
+
+      model[key] = function() {
+        const numArgs = arguments.length;
+        const lastArg = numArgs > 0 ? arguments[numArgs - 1] : null;
+        const cb = typeof lastArg === 'function' ? lastArg : null;
+        const args = Array.prototype.slice.
+          call(arguments, 0, cb == null ? numArgs : numArgs - 1);
+        // Special case: can't use `Kareem#wrap()` because it doesn't currently
+        // support wrapped functions that return a promise.
+        return utils.promiseOrCallback(cb, callback => {
+          hooks.execPre(key, model, args, function(err) {
+            if (err != null) {
+              return callback(err);
+            }
+
+            let postCalled = 0;
+            const ret = original.apply(model, args.concat(post));
+            if (ret != null && typeof ret.then === 'function') {
+              ret.then(res => post(null, res), err => post(err));
+            }
+
+            function post(error, res) {
+              if (postCalled++ > 0) {
+                return;
+              }
+
+              if (error != null) {
+                return callback(error);
+              }
+
+              hooks.execPost(key, model, [res], function(error) {
+                if (error != null) {
+                  return callback(error);
+                }
+                callback(null, res);
+              });
+            }
+          });
+        }, model.events);
+      };
+    }
+  }
+};

node_modules/mongoose/lib/helpers/model/applyStatics.js

@@ -0,0 +1,12 @@
+'use strict';
+
+/*!
+ * Register statics for this model
+ * @param {Model} model
+ * @param {Schema} schema
+ */
+module.exports = function applyStatics(model, schema) {
+  for (const i in schema.statics) {
+    model[i] = schema.statics[i];
+  }
+};

node_modules/mongoose/lib/helpers/model/castBulkWrite.js

@@ -0,0 +1,140 @@
+'use strict';
+
+const applyTimestampsToChildren = require('../update/applyTimestampsToChildren');
+const applyTimestampsToUpdate = require('../update/applyTimestampsToUpdate');
+const cast = require('../../cast');
+const castUpdate = require('../query/castUpdate');
+const setDefaultsOnInsert = require('../setDefaultsOnInsert');
+
+/*!
+ * Given a model and a bulkWrite op, return a thunk that handles casting and
+ * validating the individual op.
+ */
+
+module.exports = function castBulkWrite(model, op, options) {
+  const now = model.base.now();
+  if (op['insertOne']) {
+    return (callback) => {
+      const doc = new model(op['insertOne']['document']);
+      if (model.schema.options.timestamps != null) {
+        doc.initializeTimestamps();
+      }
+      if (options.session != null) {
+        doc.$session(options.session);
+      }
+      op['insertOne']['document'] = doc;
+      op['insertOne']['document'].validate({ __noPromise: true }, function(error) {
+        if (error) {
+          return callback(error, null);
+        }
+        callback(null);
+      });
+    };
+  } else if (op['updateOne']) {
+    op = op['updateOne'];
+    return (callback) => {
+      try {
+        op['filter'] = cast(model.schema, op['filter']);
+        op['update'] = castUpdate(model.schema, op['update'], {
+          strict: model.schema.options.strict,
+          overwrite: false
+        });
+        if (op.setDefaultsOnInsert) {
+          setDefaultsOnInsert(op['filter'], model.schema, op['update'], {
+            setDefaultsOnInsert: true,
+            upsert: op.upsert
+          });
+        }
+        if (model.schema.$timestamps != null) {
+          const createdAt = model.schema.$timestamps.createdAt;
+          const updatedAt = model.schema.$timestamps.updatedAt;
+          applyTimestampsToUpdate(now, createdAt, updatedAt, op['update'], {});
+        }
+        applyTimestampsToChildren(now, op['update'], model.schema);
+      } catch (error) {
+        return callback(error, null);
+      }
+
+      callback(null);
+    };
+  } else if (op['updateMany']) {
+    op = op['updateMany'];
+    return (callback) => {
+      try {
+        op['filter'] = cast(model.schema, op['filter']);
+        op['update'] = castUpdate(model.schema, op['update'], {
+          strict: model.schema.options.strict,
+          overwrite: false
+        });
+        if (op.setDefaultsOnInsert) {
+          setDefaultsOnInsert(op['filter'], model.schema, op['update'], {
+            setDefaultsOnInsert: true,
+            upsert: op.upsert
+          });
+        }
+        if (model.schema.$timestamps != null) {
+          const createdAt = model.schema.$timestamps.createdAt;
+          const updatedAt = model.schema.$timestamps.updatedAt;
+          applyTimestampsToUpdate(now, createdAt, updatedAt, op['update'], {});
+        }
+        applyTimestampsToChildren(now, op['update'], model.schema);
+      } catch (error) {
+        return callback(error, null);
+      }
+
+      callback(null);
+    };
+  } else if (op['replaceOne']) {
+    return (callback) => {
+      try {
+        op['replaceOne']['filter'] = cast(model.schema,
+          op['replaceOne']['filter']);
+      } catch (error) {
+        return callback(error, null);
+      }
+
+      // set `skipId`, otherwise we get "_id field cannot be changed"
+      const doc = new model(op['replaceOne']['replacement'], null, true);
+      if (model.schema.options.timestamps != null) {
+        doc.initializeTimestamps();
+      }
+      if (options.session != null) {
+        doc.$session(options.session);
+      }
+      op['replaceOne']['replacement'] = doc;
+
+      op['replaceOne']['replacement'].validate({ __noPromise: true }, function(error) {
+        if (error) {
+          return callback(error, null);
+        }
+        callback(null);
+      });
+    };
+  } else if (op['deleteOne']) {
+    return (callback) => {
+      try {
+        op['deleteOne']['filter'] = cast(model.schema,
+          op['deleteOne']['filter']);
+      } catch (error) {
+        return callback(error, null);
+      }
+
+      callback(null);
+    };
+  } else if (op['deleteMany']) {
+    return (callback) => {
+      try {
+        op['deleteMany']['filter'] = cast(model.schema,
+          op['deleteMany']['filter']);
+      } catch (error) {
+        return callback(error, null);
+      }
+
+      callback(null);
+    };
+  } else {
+    return (callback) => {
+      callback(new Error('Invalid op passed to `bulkWrite()`'), null);
+    };
+  }
+};

node_modules/mongoose/lib/helpers/model/discriminator.js

@@ -82,7 +82,7 @@ module.exports = function discriminator(model, name, schema, tiedValue, applyPlu
     }
 
     utils.merge(schema, baseSchema, {
-      omit: { discriminators: true, $parentSchema: true },
+      omit: { discriminators: true },
       omitNested: conflictingPaths.reduce((cur, path) => {
         cur['tree.' + path] = true;
         return cur;

node_modules/mongoose/lib/helpers/once.js

@@ -0,0 +1,12 @@
+'use strict';
+
+module.exports = function once(fn) {
+  let called = false;
+  return function() {
+    if (called) {
+      return;
+    }
+    called = true;
+    return fn.apply(null, arguments);
+  };
+};

node_modules/mongoose/lib/helpers/populate/assignRawDocsToIdStructure.js

@@ -0,0 +1,85 @@
+'use strict';
+
+module.exports = assignRawDocsToIdStructure;
+
+/*!
+ * Assign `vals` returned by mongo query to the `rawIds`
+ * structure returned from utils.getVals() honoring
+ * query sort order if specified by user.
+ *
+ * This can be optimized.
+ *
+ * Rules:
+ *
+ *   if the value of the path is not an array, use findOne rules, else find.
+ *   for findOne the results are assigned directly to doc path (including null results).
+ *   for find, if user specified sort order, results are assigned directly
+ *   else documents are put back in original order of array if found in results
+ *
+ * @param {Array} rawIds
+ * @param {Array} vals
+ * @param {Boolean} sort
+ * @api private
+ */
+
+function assignRawDocsToIdStructure(rawIds, resultDocs, resultOrder, options, recursed) {
+  // honor user specified sort order
+  const newOrder = [];
+  const sorting = options.sort && rawIds.length > 1;
+  let doc;
+  let sid;
+  let id;
+
+  for (let i = 0; i < rawIds.length; ++i) {
+    id = rawIds[i];
+
+    if (Array.isArray(id)) {
+      // handle [ [id0, id2], [id3] ]
+      assignRawDocsToIdStructure(id, resultDocs, resultOrder, options, true);
+      newOrder.push(id);
+      continue;
+    }
+
+    if (id === null && !sorting) {
+      // keep nulls for findOne unless sorting, which always
+      // removes them (backward compat)
+      newOrder.push(id);
+      continue;
+    }
+
+    sid = String(id);
+
+    doc = resultDocs[sid];
+    // If user wants separate copies of same doc, use this option
+    if (options.clone) {
+      doc = doc.constructor.hydrate(doc._doc);
+    }
+
+    if (recursed) {
+      if (doc) {
+        if (sorting) {
+          newOrder[resultOrder[sid]] = doc;
+        } else {
+          newOrder.push(doc);
+        }
+      } else {
+        newOrder.push(id);
+      }
+    } else {
+      // apply findOne behavior - if document in results, assign, else assign null
+      newOrder[i] = doc || null;
+    }
+  }
+
+  rawIds.length = 0;
+  if (newOrder.length) {
+    // reassign the documents based on corrected order
+
+    // forEach skips over sparse entries in arrays so we
+    // can safely use this to our advantage dealing with sorted
+    // result sets too.
+    newOrder.forEach(function(doc, i) {
+      rawIds[i] = doc;
+    });
+  }
+}

node_modules/mongoose/lib/helpers/populate/assignVals.js

@@ -0,0 +1,215 @@
+'use strict';
+
+const assignRawDocsToIdStructure = require('./assignRawDocsToIdStructure');
+const get = require('../get');
+const getVirtual = require('./getVirtual');
+const leanPopulateMap = require('./leanPopulateMap');
+const mpath = require('mpath');
+const sift = require('sift').default;
+const utils = require('../../utils');
+
+module.exports = function assignVals(o) {
+  // Options that aren't explicitly listed in `populateOptions`
+  const userOptions = get(o, 'allOptions.options.options');
+  // `o.options` contains options explicitly listed in `populateOptions`, like
+  // `match` and `limit`.
+  const populateOptions = Object.assign({}, o.options, userOptions, {
+    justOne: o.justOne
+  });
+
+  const originalIds = [].concat(o.rawIds);
+
+  // replace the original ids in our intermediate _ids structure
+  // with the documents found by query
+  assignRawDocsToIdStructure(o.rawIds, o.rawDocs, o.rawOrder, populateOptions);
+
+  // now update the original documents being populated using the
+  // result structure that contains real documents.
+  const docs = o.docs;
+  const rawIds = o.rawIds;
+  const options = o.options;
+  const count = o.count && o.isVirtual;
+
+  function setValue(val) {
+    if (count) {
+      return val;
+    }
+    if (o.justOne === true && Array.isArray(val)) {
+      return valueFilter(val[0], options, populateOptions);
+    } else if (o.justOne === false && !Array.isArray(val)) {
+      return valueFilter([val], options, populateOptions);
+    }
+    return valueFilter(val, options, populateOptions);
+  }
+
+  for (let i = 0; i < docs.length; ++i) {
+    const existingVal = utils.getValue(o.path, docs[i]);
+    if (existingVal == null && !getVirtual(o.originalModel.schema, o.path)) {
+      continue;
+    }
+
+    let valueToSet;
+    if (count) {
+      valueToSet = numDocs(rawIds[i]);
+    } else if (Array.isArray(o.match)) {
+      valueToSet = Array.isArray(rawIds[i]) ?
+        sift(o.match[i], rawIds[i]) :
+        sift(o.match[i], [rawIds[i]])[0];
+    } else {
+      valueToSet = rawIds[i];
+    }
+
+    // If we're populating a map, the existing value will be an object, so
+    // we need to transform again
+    const originalSchema = o.originalModel.schema;
+    const isDoc = get(docs[i], '$__', null) != null;
+    let isMap = isDoc ?
+      existingVal instanceof Map :
+      utils.isPOJO(existingVal);
+    // If we pass the first check, also make sure the local field's schematype
+    // is map (re: gh-6460)
+    isMap = isMap && get(originalSchema._getSchema(o.path), '$isSchemaMap');
+    if (!o.isVirtual && isMap) {
+      const _keys = existingVal instanceof Map ?
+        Array.from(existingVal.keys()) :
+        Object.keys(existingVal);
+      valueToSet = valueToSet.reduce((cur, v, i) => {
+        cur.set(_keys[i], v);
+        return cur;
+      }, new Map());
+    }
+
+    if (o.isVirtual && isDoc) {
+      docs[i].populated(o.path, o.justOne ? originalIds[0] : originalIds, o.allOptions);
+      // If virtual populate and doc is already init-ed, need to walk through
+      // the actual doc to set rather than setting `_doc` directly
+      mpath.set(o.path, valueToSet, docs[i], setValue);
+      continue;
+    }
+
+    const parts = o.path.split('.');
+    let cur = docs[i];
+    for (let j = 0; j < parts.length - 1; ++j) {
+      if (cur[parts[j]] == null) {
+        cur[parts[j]] = {};
+      }
+      cur = cur[parts[j]];
+      // If the property in MongoDB is a primitive, we won't be able to populate
+      // the nested path, so skip it. See gh-7545
+      if (typeof cur !== 'object') {
+        return;
+      }
+    }
+    if (docs[i].$__) {
+      docs[i].populated(o.path, o.allIds[i], o.allOptions);
+    }
+
+    // If lean, need to check that each individual virtual respects
+    // `justOne`, because you may have a populated virtual with `justOne`
+    // underneath an array. See gh-6867
+    utils.setValue(o.path, valueToSet, docs[i], setValue, false);
+  }
+};
+
+function numDocs(v) {
+  if (Array.isArray(v)) {
+    return v.length;
+  }
+  return v == null ? 0 : 1;
+}
+
+/*!
+ * 1) Apply backwards compatible find/findOne behavior to sub documents
+ *
+ *    find logic:
+ *      a) filter out non-documents
+ *      b) remove _id from sub docs when user specified
+ *
+ *    findOne
+ *      a) if no doc found, set to null
+ *      b) remove _id from sub docs when user specified
+ *
+ * 2) Remove _ids when specified by users query.
+ *
+ * background:
+ * _ids are left in the query even when user excludes them so
+ * that population mapping can occur.
+ */
+
+function valueFilter(val, assignmentOpts, populateOptions) {
+  if (Array.isArray(val)) {
+    // find logic
+    const ret = [];
+    const numValues = val.length;
+    for (let i = 0; i < numValues; ++i) {
+      const subdoc = val[i];
+      if (!isPopulatedObject(subdoc) && (!populateOptions.retainNullValues || subdoc != null)) {
+        continue;
+      }
+      maybeRemoveId(subdoc, assignmentOpts);
+      ret.push(subdoc);
+      if (assignmentOpts.originalLimit &&
+          ret.length >= assignmentOpts.originalLimit) {
+        break;
+      }
+    }
+
+    // Since we don't want to have to create a new mongoosearray, make sure to
+    // modify the array in place
+    while (val.length > ret.length) {
+      Array.prototype.pop.apply(val, []);
+    }
+    for (let i = 0; i < ret.length; ++i) {
+      val[i] = ret[i];
+    }
+    return val;
+  }
+
+  // findOne
+  if (isPopulatedObject(val)) {
+    maybeRemoveId(val, assignmentOpts);
+    return val;
+  }
+
+  if (val instanceof Map) {
+    return val;
+  }
+
+  if (populateOptions.justOne === true) {
+    return (val == null ? val : null);
+  }
+  if (populateOptions.justOne === false) {
+    return [];
+  }
+  return val;
+}
+
+/*!
+ * Remove _id from `subdoc` if user specified "lean" query option
+ */
+
+function maybeRemoveId(subdoc, assignmentOpts) {
+  if (assignmentOpts.excludeId) {
+    if (typeof subdoc.setValue === 'function') {
+      delete subdoc._doc._id;
+    } else {
+      delete subdoc._id;
+    }
+  }
+}
+
+/*!
+ * Determine if `obj` is something we can set a populated path to. Can be a
+ * document, a lean document, or an array/map that contains docs.
+ */
+
+function isPopulatedObject(obj) {
+  if (obj == null) {
+    return false;
+  }
+
+  return Array.isArray(obj) ||
+    obj.$isMongooseMap ||
+    obj.$__ != null ||
+    leanPopulateMap.has(obj);
+}

node_modules/mongoose/lib/helpers/populate/getSchemaTypes.js

@@ -0,0 +1,196 @@
+'use strict';
+
+/*!
+ * ignore
+ */
+
+const Mixed = require('../../schema/mixed');
+const get = require('../get');
+const leanPopulateMap = require('./leanPopulateMap');
+const mpath = require('mpath');
+
+/*!
+ * @param {Schema} schema
+ * @param {Object} doc POJO
+ * @param {string} path
+ */
+
+module.exports = function getSchemaTypes(schema, doc, path) {
+  const pathschema = schema.path(path);
+  const topLevelDoc = doc;
+
+  if (pathschema) {
+    return pathschema;
+  }
+
+  function search(parts, schema, subdoc, nestedPath) {
+    let p = parts.length + 1;
+    let foundschema;
+    let trypath;
+
+    while (p--) {
+      trypath = parts.slice(0, p).join('.');
+      foundschema = schema.path(trypath);
+
+      if (foundschema == null) {
+        continue;
+      }
+
+      if (foundschema.caster) {
+        // array of Mixed?
+        if (foundschema.caster instanceof Mixed) {
+          return foundschema.caster;
+        }
+
+        let schemas = null;
+        if (doc != null && foundschema.schema != null && foundschema.schema.discriminators != null) {
+          const discriminators = foundschema.schema.discriminators;
+          const discriminatorKeyPath = trypath + '.' +
+            foundschema.schema.options.discriminatorKey;
+          const keys = subdoc ? mpath.get(discriminatorKeyPath, subdoc) || [] : [];
+          schemas = Object.keys(discriminators).
+            reduce(function(cur, discriminator) {
+              if (keys.indexOf(discriminator) !== -1) {
+                cur.push(discriminators[discriminator]);
+              }
+              return cur;
+            }, []);
+        }
+
+        // Now that we found the array, we need to check if there
+        // are remaining document paths to look up for casting.
+        // Also we need to handle array.$.path since schema.path
+        // doesn't work for that.
+        // If there is no foundschema.schema we are dealing with
+        // a path like array.$
+        if (p !== parts.length && foundschema.schema) {
+          let ret;
+          if (parts[p] === '$') {
+            if (p + 1 === parts.length) {
+              // comments.$
+              return foundschema;
+            }
+            // comments.$.comments.$.title
+            ret = search(
+              parts.slice(p + 1),
+              schema,
+              subdoc ? mpath.get(trypath, subdoc) : null,
+              nestedPath.concat(parts.slice(0, p))
+            );
+            if (ret) {
+              ret.$isUnderneathDocArray = ret.$isUnderneathDocArray ||
+                !foundschema.schema.$isSingleNested;
+            }
+            return ret;
+          }
+
+          if (schemas != null && schemas.length > 0) {
+            ret = [];
+            for (let i = 0; i < schemas.length; ++i) {
+              const _ret = search(
+                parts.slice(p),
+                schemas[i],
+                subdoc ? mpath.get(trypath, subdoc) : null,
+                nestedPath.concat(parts.slice(0, p))
+              );
+              if (_ret != null) {
+                _ret.$isUnderneathDocArray = _ret.$isUnderneathDocArray ||
+                  !foundschema.schema.$isSingleNested;
+                if (_ret.$isUnderneathDocArray) {
+                  ret.$isUnderneathDocArray = true;
+                }
+                ret.push(_ret);
+              }
+            }
+            return ret;
+          } else {
+            ret = search(
+              parts.slice(p),
+              foundschema.schema,
+              subdoc ? mpath.get(trypath, subdoc) : null,
+              nestedPath.concat(parts.slice(0, p))
+            );
+
+            if (ret) {
+              ret.$isUnderneathDocArray = ret.$isUnderneathDocArray ||
+                !foundschema.schema.$isSingleNested;
+            }
+
+            return ret;
+          }
+        } else if (p !== parts.length &&
+            foundschema.$isMongooseArray &&
+            foundschema.casterConstructor.$isMongooseArray) {
+          // Nested arrays. Drill down to the bottom of the nested array.
+          // Ignore discriminators.
+          let type = foundschema;
+          while (type.$isMongooseArray && !type.$isMongooseDocumentArray) {
+            type = type.casterConstructor;
+          }
+          return search(
+            parts.slice(p),
+            type.schema,
+            null,
+            nestedPath.concat(parts.slice(0, p))
+          );
+        }
+      }
+
+      const fullPath = nestedPath.concat([trypath]).join('.');
+      if (topLevelDoc.$__ && topLevelDoc.populated(fullPath) && p < parts.length) {
+        const schema = get(doc.$__.populated[fullPath], 'options.model.schema');
+        if (schema != null) {
+          const ret = search(
+            parts.slice(p),
+            schema,
+            subdoc ? mpath.get(trypath, subdoc) : null,
+            nestedPath.concat(parts.slice(0, p))
+          );
+
+          if (ret) {
+            ret.$isUnderneathDocArray = ret.$isUnderneathDocArray ||
+              !schema.$isSingleNested;
+          }
+
+          return ret;
+        }
+      }
+
+      const _val = get(topLevelDoc, trypath);
+      if (_val != null) {
+        const model = Array.isArray(_val) && _val.length > 0 ?
+          leanPopulateMap.get(_val[0]) :
+          leanPopulateMap.get(_val);
+        // Populated using lean, `leanPopulateMap` value is the foreign model
+        const schema = model != null ? model.schema : null;
+        if (schema != null) {
+          const ret = search(
+            parts.slice(p),
+            schema,
+            subdoc ? mpath.get(trypath, subdoc) : null,
+            nestedPath.concat(parts.slice(0, p))
+          );
+
+          if (ret) {
+            ret.$isUnderneathDocArray = ret.$isUnderneathDocArray ||
+              !schema.$isSingleNested;
+          }
+
+          return ret;
+        }
+      }
+
+      return foundschema;
+    }
+  }
+
+  // look for arrays
+  const parts = path.split('.');
+  for (let i = 0; i < parts.length; ++i) {
+    if (parts[i] === '$') {
+      // Re: gh-5628, because `schema.path()` doesn't take $ into account.
+      parts[i] = '0';
+    }
+  }
+  return search(parts, schema, doc, []);
+};

node_modules/mongoose/lib/helpers/populate/getVirtual.js

@@ -0,0 +1,61 @@
+'use strict';
+
+module.exports = getVirtual;
+
+/*!
+ * ignore
+ */
+
+function getVirtual(schema, name) {
+  if (schema.virtuals[name]) {
+    return schema.virtuals[name];
+  }
+  const parts = name.split('.');
+  let cur = '';
+  let nestedSchemaPath = '';
+  for (let i = 0; i < parts.length; ++i) {
+    cur += (cur.length > 0 ? '.' : '') + parts[i];
+    if (schema.virtuals[cur]) {
+      if (i === parts.length - 1) {
+        schema.virtuals[cur].$nestedSchemaPath = nestedSchemaPath;
+        return schema.virtuals[cur];
+      }
+      continue;
+    }
+
+    if (schema.nested[cur]) {
+      continue;
+    }
+
+    if (schema.paths[cur] && schema.paths[cur].schema) {
+      schema = schema.paths[cur].schema;
+      const rest = parts.slice(i + 1).join('.');
+
+      if (schema.virtuals[rest]) {
+        if (i === parts.length - 2) {
+          schema.virtuals[rest].$nestedSchemaPath =
+            [nestedSchemaPath, cur].filter(v => !!v).join('.');
+          return schema.virtuals[rest];
+        }
+        continue;
+      }
+
+      if (i + 1 < parts.length && schema.discriminators) {
+        for (const key of Object.keys(schema.discriminators)) {
+          const _virtual = getVirtual(schema.discriminators[key], rest);
+          if (_virtual != null) {
+            _virtual.$nestedSchemaPath = [nestedSchemaPath, cur].
+              filter(v => !!v).join('.');
+            return _virtual;
+          }
+        }
+      }
+
+      nestedSchemaPath += (nestedSchemaPath.length > 0 ? '.' : '') + cur;
+      cur = '';
+      continue;
+    }
+
+    return null;
+  }
+}

node_modules/mongoose/lib/helpers/populate/leanPopulateMap.js

@@ -0,0 +1,7 @@
+'use strict';
+
+/*!
+ * ignore
+ */
+
+module.exports = new WeakMap();

node_modules/mongoose/lib/helpers/populate/normalizeRefPath.js

@@ -0,0 +1,45 @@
+'use strict';
+
+module.exports = function normalizeRefPath(refPath, doc, populatedPath) {
+  if (refPath == null) {
+    return refPath;
+  }
+
+  if (typeof refPath === 'function') {
+    refPath = refPath.call(doc, doc, populatedPath);
+  }
+
+  // If populated path has numerics, the end `refPath` should too. For example,
+  // if populating `a.0.b` instead of `a.b` and `b` has `refPath = a.c`, we
+  // should return `a.0.c` for the refPath.
+  const hasNumericProp = /(\.\d+$|\.\d+\.)/g;
+
+  if (hasNumericProp.test(populatedPath)) {
+    const chunks = populatedPath.split(hasNumericProp);
+
+    if (chunks[chunks.length - 1] === '') {
+      throw new Error('Can\'t populate individual element in an array');
+    }
+
+    let _refPath = '';
+    let _remaining = refPath;
+    // 2nd, 4th, etc. will be numeric props. For example: `[ 'a', '.0.', 'b' ]`
+    for (let i = 0; i < chunks.length; i += 2) {
+      const chunk = chunks[i];
+      if (_remaining.startsWith(chunk + '.')) {
+        _refPath += _remaining.substr(0, chunk.length) + chunks[i + 1];
+        _remaining = _remaining.substr(chunk.length + 1);
+      } else if (i === chunks.length - 1) {
+        _refPath += _remaining;
+        _remaining = '';
+        break;
+      } else {
+        throw new Error('Could not normalize ref path, chunk ' + chunk + ' not in populated path');
+      }
+    }
+
+    return _refPath;
+  }
+
+  return refPath;
+};

node_modules/mongoose/lib/helpers/populate/validateRef.js

@@ -0,0 +1,19 @@
+'use strict';
+
+const MongooseError = require('../../error/mongooseError');
+const util = require('util');
+
+module.exports = validateRef;
+
+function validateRef(ref, path) {
+  if (typeof ref === 'string') {
+    return;
+  }
+
+  if (typeof ref === 'function') {
+    return;
+  }
+
+  throw new MongooseError('Invalid ref at path "' + path + '". Got ' +
+    util.inspect(ref, { depth: 0 }));
+}

node_modules/mongoose/lib/helpers/printJestWarning.js

@@ -0,0 +1,8 @@
+'use strict';
+
+if (typeof jest !== 'undefined' && typeof window !== 'undefined') {
+  console.warn('Mongoose: looks like you\'re trying to test a Mongoose app ' +
+    'with Jest\'s default jsdom test environment. Please make sure you read ' +
+    'Mongoose\'s docs on configuring Jest to test Node.js apps: ' +
+    'http://mongoosejs.com/docs/jest.html');
+}

node_modules/mongoose/lib/helpers/projection/isDefiningProjection.js

@@ -0,0 +1,18 @@
+'use strict';
+
+/*!
+ * ignore
+ */
+
+module.exports = function isDefiningProjection(val) {
+  if (val == null) {
+    // `undefined` or `null` become exclusive projections
+    return true;
+  }
+  if (typeof val === 'object') {
+    // Only cases where a value does **not** define whether the whole projection
+    // is inclusive or exclusive are `$meta` and `$slice`.
+    return !('$meta' in val) && !('$slice' in val);
+  }
+  return true;
+};

node_modules/mongoose/lib/helpers/projection/isExclusive.js

@@ -0,0 +1,28 @@
+'use strict';
+
+const isDefiningProjection = require('./isDefiningProjection');
+
+/*!
+ * ignore
+ */
+
+module.exports = function isExclusive(projection) {
+  const keys = Object.keys(projection);
+  let ki = keys.length;
+  let exclude = null;
+
+  if (ki === 1 && keys[0] === '_id') {
+    exclude = !!projection[keys[ki]];
+  } else {
+    while (ki--) {
+      // Does this projection explicitly define inclusion/exclusion?
+      // Explicitly avoid `$meta` and `$slice`
+      if (keys[ki] !== '_id' && isDefiningProjection(projection[keys[ki]])) {
+        exclude = !projection[keys[ki]];
+        break;
+      }
+    }
+  }
+
+  return exclude;
+};

node_modules/mongoose/lib/helpers/projection/isInclusive.js

@@ -0,0 +1,34 @@
+'use strict';
+
+const isDefiningProjection = require('./isDefiningProjection');
+
+/*!
+ * ignore
+ */
+
+module.exports = function isInclusive(projection) {
+  if (projection == null) {
+    return false;
+  }
+
+  const props = Object.keys(projection);
+  const numProps = props.length;
+  if (numProps === 0) {
+    return false;
+  }
+
+  for (let i = 0; i < numProps; ++i) {
+    const prop = props[i];
+    // Plus paths can't define the projection (see gh-7050)
+    if (prop.charAt(0) === '+') {
+      continue;
+    }
+    // If field is truthy (1, true, etc.) and not an object, then this
+    // projection must be inclusive. If object, assume its $meta, $slice, etc.
+    if (isDefiningProjection(projection[prop]) && !!projection[prop]) {
+      return true;
+    }
+  }
+
+  return false;
+};

node_modules/mongoose/lib/helpers/projection/isPathExcluded.js

@@ -0,0 +1,35 @@
+'use strict';
+
+const isDefiningProjection = require('./isDefiningProjection');
+
+/*!
+ * Determines if `path` is excluded by `projection`
+ *
+ * @param {Object} projection
+ * @param {string} path
+ * @return {Boolean}
+ */
+
+module.exports = function isPathExcluded(projection, path) {
+  if (path === '_id') {
+    return projection._id === 0;
+  }
+
+  const paths = Object.keys(projection);
+  let type = null;
+
+  for (const _path of paths) {
+    if (isDefiningProjection(projection[_path])) {
+      type = projection[path] === 1 ? 'inclusive' : 'exclusive';
+      break;
+    }
+  }
+
+  if (type === 'inclusive') {
+    return projection[path] !== 1;
+  }
+  if (type === 'exclusive') {
+    return projection[path] === 0;
+  }
+  return false;
+};

node_modules/mongoose/lib/helpers/projection/isPathSelectedInclusive.js

@@ -0,0 +1,28 @@
+'use strict';
+
+/*!
+ * ignore
+ */
+
+module.exports = function isPathSelectedInclusive(fields, path) {
+  const chunks = path.split('.');
+  let cur = '';
+  let j;
+  let keys;
+  let numKeys;
+  for (let i = 0; i < chunks.length; ++i) {
+    cur += cur.length ? '.' : '' + chunks[i];
+    if (fields[cur]) {
+      keys = Object.keys(fields);
+      numKeys = keys.length;
+      for (j = 0; j < numKeys; ++j) {
+        if (keys[i].indexOf(cur + '.') === 0 && keys[i].indexOf(path) !== 0) {
+          continue;
+        }
+      }
+      return true;
+    }
+  }
+
+  return false;
+};

node_modules/mongoose/lib/helpers/query/applyQueryMiddleware.js

@@ -0,0 +1,70 @@
+'use strict';
+
+/*!
+ * ignore
+ */
+
+module.exports = applyQueryMiddleware;
+
+/*!
+ * ignore
+ */
+
+applyQueryMiddleware.middlewareFunctions = [
+  'count',
+  'countDocuments',
+  'deleteMany',
+  'deleteOne',
+  'distinct',
+  'estimatedDocumentCount',
+  'find',
+  'findOne',
+  'findOneAndDelete',
+  'findOneAndRemove',
+  'findOneAndReplace',
+  'findOneAndUpdate',
+  'remove',
+  'replaceOne',
+  'update',
+  'updateMany',
+  'updateOne'
+];
+
+/*!
+ * Apply query middleware
+ *
+ * @param {Query} query constructor
+ * @param {Model} model
+ */
+
+function applyQueryMiddleware(Query, model) {
+  const kareemOptions = {
+    useErrorHandlers: true,
+    numCallbackParams: 1,
+    nullResultByDefault: true
+  };
+
+  const middleware = model.hooks.filter(hook => {
+    if (hook.name === 'updateOne' || hook.name === 'deleteOne') {
+      return hook.query == null || !!hook.query;
+    }
+    if (hook.name === 'remove') {
+      return !!hook.query;
+    }
+    return true;
+  });
+
+  // `update()` thunk has a different name because `_update` was already taken
+  Query.prototype._execUpdate = middleware.createWrapper('update',
+    Query.prototype._execUpdate, null, kareemOptions);
+  // `distinct()` thunk has a different name because `_distinct` was already taken
+  Query.prototype.__distinct = middleware.createWrapper('distinct',
+    Query.prototype.__distinct, null, kareemOptions);
+
+  applyQueryMiddleware.middlewareFunctions.
+    filter(v => v !== 'update' && v !== 'distinct').
+    forEach(fn => {
+      Query.prototype[`_${fn}`] = middleware.createWrapper(fn,
+        Query.prototype[`_${fn}`], null, kareemOptions);
+    });
+}

node_modules/mongoose/lib/helpers/query/castFilterPath.js

@@ -52,4 +52,4 @@ module.exports = function castFilterPath(query, schematype, val) {
   }
 
   return val;
-};
+};

node_modules/mongoose/lib/helpers/query/castUpdate.js

@@ -0,0 +1,442 @@
+'use strict';
+
+const CastError = require('../../error/cast');
+const StrictModeError = require('../../error/strict');
+const ValidationError = require('../../error/validation');
+const castNumber = require('../../cast/number');
+const getEmbeddedDiscriminatorPath = require('./getEmbeddedDiscriminatorPath');
+const utils = require('../../utils');
+
+/*!
+ * Casts an update op based on the given schema
+ *
+ * @param {Schema} schema
+ * @param {Object} obj
+ * @param {Object} options
+ * @param {Boolean} [options.overwrite] defaults to false
+ * @param {Boolean|String} [options.strict] defaults to true
+ * @param {Query} context passed to setters
+ * @return {Boolean} true iff the update is non-empty
+ */
+
+module.exports = function castUpdate(schema, obj, options, context, filter) {
+  if (!obj) {
+    return undefined;
+  }
+
+  const ops = Object.keys(obj);
+  let i = ops.length;
+  const ret = {};
+  let hasKeys;
+  let val;
+  let hasDollarKey = false;
+  const overwrite = options.overwrite;
+
+  filter = filter || {};
+
+  while (i--) {
+    const op = ops[i];
+    // if overwrite is set, don't do any of the special $set stuff
+    if (op[0] !== '$' && !overwrite) {
+      // fix up $set sugar
+      if (!ret.$set) {
+        if (obj.$set) {
+          ret.$set = obj.$set;
+        } else {
+          ret.$set = {};
+        }
+      }
+      ret.$set[op] = obj[op];
+      ops.splice(i, 1);
+      if (!~ops.indexOf('$set')) ops.push('$set');
+    } else if (op === '$set') {
+      if (!ret.$set) {
+        ret[op] = obj[op];
+      }
+    } else {
+      ret[op] = obj[op];
+    }
+  }
+
+  // cast each value
+  i = ops.length;
+
+  // if we get passed {} for the update, we still need to respect that when it
+  // is an overwrite scenario
+  if (overwrite) {
+    hasKeys = true;
+  }
+
+  while (i--) {
+    const op = ops[i];
+    val = ret[op];
+    hasDollarKey = hasDollarKey || op.charAt(0) === '$';
+
+    if (val &&
+        typeof val === 'object' &&
+        !Buffer.isBuffer(val) &&
+        (!overwrite || hasDollarKey)) {
+      hasKeys |= walkUpdatePath(schema, val, op, options, context, filter);
+    } else if (overwrite && ret && typeof ret === 'object') {
+      // if we are just using overwrite, cast the query and then we will
+      // *always* return the value, even if it is an empty object. We need to
+      // set hasKeys above because we need to account for the case where the
+      // user passes {} and wants to clobber the whole document
+      // Also, _walkUpdatePath expects an operation, so give it $set since that
+      // is basically what we're doing
+      walkUpdatePath(schema, ret, '$set', options, context, filter);
+    } else {
+      const msg = 'Invalid atomic update value for ' + op + '. '
+          + 'Expected an object, received ' + typeof val;
+      throw new Error(msg);
+    }
+  }
+
+  return hasKeys && ret;
+};
+
+/*!
+ * Walk each path of obj and cast its values
+ * according to its schema.
+ *
+ * @param {Schema} schema
+ * @param {Object} obj - part of a query
+ * @param {String} op - the atomic operator ($pull, $set, etc)
+ * @param {Object} options
+ * @param {Boolean|String} [options.strict]
+ * @param {Boolean} [options.omitUndefined]
+ * @param {Query} context
+ * @param {String} pref - path prefix (internal only)
+ * @return {Bool} true if this path has keys to update
+ * @api private
+ */
+
+function walkUpdatePath(schema, obj, op, options, context, filter, pref) {
+  const strict = options.strict;
+  const prefix = pref ? pref + '.' : '';
+  const keys = Object.keys(obj);
+  let i = keys.length;
+  let hasKeys = false;
+  let schematype;
+  let key;
+  let val;
+
+  let aggregatedError = null;
+
+  let useNestedStrict;
+  if (options.useNestedStrict === undefined) {
+    useNestedStrict = schema.options.useNestedStrict;
+  } else {
+    useNestedStrict = options.useNestedStrict;
+  }
+
+  while (i--) {
+    key = keys[i];
+    val = obj[key];
+
+    if (val && val.constructor.name === 'Object') {
+      // watch for embedded doc schemas
+      schematype = schema._getSchema(prefix + key);
+      if (schematype && schematype.caster && op in castOps) {
+        // embedded doc schema
+        if ('$each' in val) {
+          hasKeys = true;
+          try {
+            obj[key] = {
+              $each: castUpdateVal(schematype, val.$each, op, key, context, prefix + key)
+            };
+          } catch (error) {
+            aggregatedError = _handleCastError(error, context, key, aggregatedError);
+          }
+
+          if (val.$slice != null) {
+            obj[key].$slice = val.$slice | 0;
+          }
+
+          if (val.$sort) {
+            obj[key].$sort = val.$sort;
+          }
+
+          if (!!val.$position || val.$position === 0) {
+            obj[key].$position = val.$position;
+          }
+        } else {
+          try {
+            obj[key] = castUpdateVal(schematype, val, op, key, context, prefix + key);
+          } catch (error) {
+            aggregatedError = _handleCastError(error, context, key, aggregatedError);
+          }
+
+          if (options.omitUndefined && obj[key] === void 0) {
+            delete obj[key];
+            continue;
+          }
+
+          hasKeys = true;
+        }
+      } else if ((op === '$currentDate') || (op in castOps && schematype)) {
+        // $currentDate can take an object
+        try {
+          obj[key] = castUpdateVal(schematype, val, op, key, context, prefix + key);
+        } catch (error) {
+          aggregatedError = _handleCastError(error, context, key, aggregatedError);
+        }
+
+        if (options.omitUndefined && obj[key] === void 0) {
+          delete obj[key];
+          continue;
+        }
+
+        hasKeys = true;
+      } else {
+        const pathToCheck = (prefix + key);
+        const v = schema._getPathType(pathToCheck);
+        let _strict = strict;
+        if (useNestedStrict &&
+            v &&
+            v.schema &&
+            'strict' in v.schema.options) {
+          _strict = v.schema.options.strict;
+        }
+
+        if (v.pathType === 'undefined') {
+          if (_strict === 'throw') {
+            throw new StrictModeError(pathToCheck);
+          } else if (_strict) {
+            delete obj[key];
+            continue;
+          }
+        }
+
+        // gh-2314
+        // we should be able to set a schema-less field
+        // to an empty object literal
+        hasKeys |= walkUpdatePath(schema, val, op, options, context, filter, prefix + key) ||
+          (utils.isObject(val) && Object.keys(val).length === 0);
+      }
+    } else {
+      const checkPath = (key === '$each' || key === '$or' || key === '$and' || key === '$in') ?
+        pref : prefix + key;
+      schematype = schema._getSchema(checkPath);
+      let pathDetails = schema._getPathType(checkPath);
+
+      // If no schema type, check for embedded discriminators
+      if (schematype == null) {
+        const _res = getEmbeddedDiscriminatorPath(schema, obj, filter, checkPath);
+        if (_res.schematype != null) {
+          schematype = _res.schematype;
+          pathDetails = _res.type;
+        }
+      }
+
+      let isStrict = strict;
+      if (useNestedStrict &&
+          pathDetails &&
+          pathDetails.schema &&
+          'strict' in pathDetails.schema.options) {
+        isStrict = pathDetails.schema.options.strict;
+      }
+
+      const skip = isStrict &&
+        !schematype &&
+        !/real|nested/.test(pathDetails.pathType);
+
+      if (skip) {
+        // Even if strict is `throw`, avoid throwing an error because of
+        // virtuals because of #6731
+        if (isStrict === 'throw' && schema.virtuals[checkPath] == null) {
+          throw new StrictModeError(prefix + key);
+        } else {
+          delete obj[key];
+        }
+      } else {
+        // gh-1845 temporary fix: ignore $rename. See gh-3027 for tracking
+        // improving this.
+        if (op === '$rename') {
+          hasKeys = true;
+          continue;
+        }
+
+        try {
+          obj[key] = castUpdateVal(schematype, val, op, key, context, prefix + key);
+        } catch (error) {
+          aggregatedError = _handleCastError(error, context, key, aggregatedError);
+        }
+
+        if (Array.isArray(obj[key]) && (op === '$addToSet' || op === '$push') && key !== '$each') {
+          if (schematype && schematype.caster && !schematype.caster.$isMongooseArray) {
+            obj[key] = { $each: obj[key] };
+          }
+        }
+
+        if (options.omitUndefined && obj[key] === void 0) {
+          delete obj[key];
+          continue;
+        }
+
+        hasKeys = true;
+      }
+    }
+  }
+
+  if (aggregatedError != null) {
+    throw aggregatedError;
+  }
+
+  return hasKeys;
+}
+
+/*!
+ * ignore
+ */
+
+function _handleCastError(error, query, key, aggregatedError) {
+  if (typeof query !== 'object' || !query.options.multipleCastError) {
+    throw error;
+  }
+  aggregatedError = aggregatedError || new ValidationError();
+  aggregatedError.addError(key, error);
+  return aggregatedError;
+}
+
+/*!
+ * These operators should be cast to numbers instead
+ * of their path schema type.
+ */
+
+const numberOps = {
+  $pop: 1,
+  $inc: 1
+};
+
+/*!
+ * These ops require no casting because the RHS doesn't do anything.
+ */
+
+const noCastOps = {
+  $unset: 1
+};
+
+/*!
+ * These operators require casting docs
+ * to real Documents for Update operations.
+ */
+
+const castOps = {
+  $push: 1,
+  $addToSet: 1,
+  $set: 1,
+  $setOnInsert: 1
+};
+
+/*!
+ * ignore
+ */
+
+const overwriteOps = {
+  $set: 1,
+  $setOnInsert: 1
+};
+
+/*!
+ * Casts `val` according to `schema` and atomic `op`.
+ *
+ * @param {SchemaType} schema
+ * @param {Object} val
+ * @param {String} op - the atomic operator ($pull, $set, etc)
+ * @param {String} $conditional
+ * @param {Query} context
+ * @api private
+ */
+
+function castUpdateVal(schema, val, op, $conditional, context, path) {
+  if (!schema) {
+    // non-existing schema path
+    if (op in numberOps) {
+      try {
+        return castNumber(val);
+      } catch (err) {
+        throw new CastError('number', val, path);
+      }
+    }
+    return val;
+  }
+
+  const cond = schema.caster && op in castOps &&
+      (utils.isObject(val) || Array.isArray(val));
+  if (cond && !overwriteOps[op]) {
+    // Cast values for ops that add data to MongoDB.
+    // Ensures embedded documents get ObjectIds etc.
+    let schemaArrayDepth = 0;
+    let cur = schema;
+    while (cur.$isMongooseArray) {
+      ++schemaArrayDepth;
+      cur = cur.caster;
+    }
+    let arrayDepth = 0;
+    let _val = val;
+    while (Array.isArray(_val)) {
+      ++arrayDepth;
+      _val = _val[0];
+    }
+
+    const additionalNesting = schemaArrayDepth - arrayDepth;
+    while (arrayDepth < schemaArrayDepth) {
+      val = [val];
+      ++arrayDepth;
+    }
+
+    let tmp = schema.cast(Array.isArray(val) ? val : [val]);
+
+    for (let i = 0; i < additionalNesting; ++i) {
+      tmp = tmp[0];
+    }
+    return tmp;
+  }
+
+  if (op in noCastOps) {
+    return val;
+  }
+  if (op in numberOps) {
+    // Null and undefined not allowed for $pop, $inc
+    if (val == null) {
+      throw new CastError('number', val, schema.path);
+    }
+    if (op === '$inc') {
+      // Support `$inc` with long, int32, etc. (gh-4283)
+      return schema.castForQueryWrapper({
+        val: val,
+        context: context
+      });
+    }
+    try {
+      return castNumber(val);
+    } catch (error) {
+      throw new CastError('number', val, schema.path);
+    }
+  }
+  if (op === '$currentDate') {
+    if (typeof val === 'object') {
+      return {$type: val.$type};
+    }
+    return Boolean(val);
+  }
+
+  if (/^\$/.test($conditional)) {
+    return schema.castForQueryWrapper({
+      $conditional: $conditional,
+      val: val,
+      context: context
+    });
+  }
+
+  if (overwriteOps[op]) {
+    return schema.castForQueryWrapper({
+      val: val,
+      context: context,
+      $skipQueryCastForUpdate: val != null && schema.$isMongooseArray && schema.$fullPath != null && !schema.$fullPath.match(/\d+$/)
+    });
+  }
+
+  return schema.castForQueryWrapper({ val: val, context: context });
+}

node_modules/mongoose/lib/helpers/query/completeMany.js

@@ -0,0 +1,47 @@
+'use strict';
+
+const helpers = require('../../queryhelpers');
+
+module.exports = completeMany;
+
+/*!
+ * Given a model and an array of docs, hydrates all the docs to be instances
+ * of the model. Used to initialize docs returned from the db from `find()`
+ *
+ * @param {Model} model
+ * @param {Array} docs
+ * @param {Object} fields the projection used, including `select` from schemas
+ * @param {Object} userProvidedFields the user-specified projection
+ * @param {Object} opts
+ * @param {Array} [opts.populated]
+ * @param {ClientSession} [opts.session]
+ * @param {Function} callback
+ */
+
+function completeMany(model, docs, fields, userProvidedFields, opts, callback) {
+  const arr = [];
+  let count = docs.length;
+  const len = count;
+  let error = null;
+
+  function init(_error) {
+    if (_error != null) {
+      error = error || _error;
+    }
+    if (error != null) {
+      --count || process.nextTick(() => callback(error));
+      return;
+    }
+    --count || process.nextTick(() => callback(error, arr));
+  }
+
+  for (let i = 0; i < len; ++i) {
+    arr[i] = helpers.createModel(model, docs[i], fields, userProvidedFields);
+    try {
+      arr[i].init(docs[i], opts, init);
+    } catch (error) {
+      init(error);
+    }
+    arr[i].$session(opts.session);
+  }
+}

node_modules/mongoose/lib/helpers/query/getEmbeddedDiscriminatorPath.js

@@ -0,0 +1,53 @@
+'use strict';
+
+const cleanPositionalOperators = require('../schema/cleanPositionalOperators');
+const get = require('../get');
+
+/*!
+ * Like `schema.path()`, except with a document, because impossible to
+ * determine path type without knowing the embedded discriminator key.
+ */
+
+module.exports = function getEmbeddedDiscriminatorPath(schema, update, filter, path) {
+  const parts = path.split('.');
+  let schematype = null;
+  let type = 'adhocOrUndefined';
+
+  filter = filter || {};
+  update = update || {};
+
+  for (let i = 0; i < parts.length; ++i) {
+    const subpath = cleanPositionalOperators(parts.slice(0, i + 1).join('.'));
+    schematype = schema.path(subpath);
+    if (schematype == null) {
+      continue;
+    }
+    type = schema.pathType(subpath);
+    if ((schematype.$isSingleNested || schematype.$isMongooseDocumentArrayElement) &&
+        schematype.schema.discriminators != null) {
+      const discriminators = schematype.schema.discriminators;
+      const discriminatorValuePath = subpath + '.' +
+        get(schematype, 'schema.options.discriminatorKey');
+      const discriminatorFilterPath =
+        discriminatorValuePath.replace(/\.\d+\./, '.');
+      let discriminatorKey = null;
+      if (discriminatorValuePath in filter) {
+        discriminatorKey = filter[discriminatorValuePath];
+      }
+      if (discriminatorFilterPath in filter) {
+        discriminatorKey = filter[discriminatorFilterPath];
+      }
+      if (discriminatorKey == null || discriminators[discriminatorKey] == null) {
+        continue;
+      }
+      const rest = parts.slice(i + 1).join('.');
+      schematype = discriminators[discriminatorKey].path(rest);
+      if (schematype != null) {
+        type = discriminators[discriminatorKey]._getPathType(rest);
+        break;
+      }
+    }
+  }
+
+  return { type: type, schematype: schematype };
+};

node_modules/mongoose/lib/helpers/query/hasDollarKeys.js

@@ -0,0 +1,16 @@
+'use strict';
+
+/*!
+ * ignore
+ */
+
+module.exports = function(obj) {
+  const keys = Object.keys(obj);
+  const len = keys.length;
+  for (let i = 0; i < len; ++i) {
+    if (keys[i].charAt(0) === '$') {
+      return true;
+    }
+  }
+  return false;
+};

node_modules/mongoose/lib/helpers/query/selectPopulatedFields.js

@@ -0,0 +1,46 @@
+'use strict';
+
+/*!
+ * ignore
+ */
+
+module.exports = function selectPopulatedFields(query) {
+  const opts = query._mongooseOptions;
+
+  if (opts.populate != null) {
+    const paths = Object.keys(opts.populate);
+    const userProvidedFields = query._userProvidedFields || {};
+    if (query.selectedInclusively()) {
+      for (let i = 0; i < paths.length; ++i) {
+        if (!isPathInFields(userProvidedFields, paths[i])) {
+          query.select(paths[i]);
+        } else if (userProvidedFields[paths[i]] === 0) {
+          delete query._fields[paths[i]];
+        }
+      }
+    } else if (query.selectedExclusively()) {
+      for (let i = 0; i < paths.length; ++i) {
+        if (userProvidedFields[paths[i]] == null) {
+          delete query._fields[paths[i]];
+        }
+      }
+    }
+  }
+};
+
+/*!
+ * ignore
+ */
+
+function isPathInFields(userProvidedFields, path) {
+  const pieces = path.split('.');
+  const len = pieces.length;
+  let cur = pieces[0];
+  for (let i = 1; i < len; ++i) {
+    if (userProvidedFields[cur] != null) {
+      return true;
+    }
+    cur += '.' + pieces[i];
+  }
+  return userProvidedFields[cur] != null;
+}

node_modules/mongoose/lib/helpers/query/wrapThunk.js

@@ -0,0 +1,18 @@
+'use strict';
+
+/*!
+ * A query thunk is the function responsible for sending the query to MongoDB,
+ * like `Query#_findOne()` or `Query#_execUpdate()`. The `Query#exec()` function
+ * calls a thunk. The term "thunk" here is the traditional Node.js definition:
+ * a function that takes exactly 1 parameter, a callback.
+ *
+ * This function defines common behavior for all query thunks.
+ */
+
+module.exports = function wrapThunk(fn) {
+  return function _wrappedThunk(cb) {
+    ++this._executionCount;
+
+    fn.call(this, cb);
+  };
+};

node_modules/mongoose/lib/helpers/schema/applyPlugins.js

@@ -0,0 +1,43 @@
+'use strict';
+
+module.exports = function applyPlugins(schema, plugins, options, cacheKey) {
+  if (schema[cacheKey]) {
+    return;
+  }
+  schema[cacheKey] = true;
+
+  if (!options || !options.skipTopLevel) {
+    for (let i = 0; i < plugins.length; ++i) {
+      schema.plugin(plugins[i][0], plugins[i][1]);
+    }
+  }
+
+  options = Object.assign({}, options);
+  delete options.skipTopLevel;
+
+  for (const path of Object.keys(schema.paths)) {
+    const type = schema.paths[path];
+    if (type.schema != null) {
+      applyPlugins(type.schema, plugins, options, cacheKey);
+
+      // Recompile schema because plugins may have changed it, see gh-7572
+      type.caster.prototype.$__setSchema(type.schema);
+    }
+  }
+
+  const discriminators = schema.discriminators;
+  if (discriminators == null) {
+    return;
+  }
+
+  const applyPluginsToDiscriminators = options.applyPluginsToDiscriminators;
+
+  const keys = Object.keys(discriminators);
+  for (let i = 0; i < keys.length; ++i) {
+    const discriminatorKey = keys[i];
+    const discriminatorSchema = discriminators[discriminatorKey];
+
+    applyPlugins(discriminatorSchema, plugins,
+      { skipTopLevel: !applyPluginsToDiscriminators }, cacheKey);
+  }
+};

node_modules/mongoose/lib/helpers/schema/applyWriteConcern.js

@@ -0,0 +1,16 @@
+'use strict';
+
+const get = require('../get');
+
+module.exports = function applyWriteConcern(schema, options) {
+  const writeConcern = get(schema, 'options.writeConcern', {});
+  if (!('w' in options) && writeConcern.w != null) {
+    options.w = writeConcern.w;
+  }
+  if (!('j' in options) && writeConcern.j != null) {
+    options.j = writeConcern.j;
+  }
+  if (!('wtimeout' in options) && writeConcern.wtimeout != null) {
+    options.wtimeout = writeConcern.wtimeout;
+  }
+};

node_modules/mongoose/lib/helpers/schema/cleanPositionalOperators.js

@@ -0,0 +1,12 @@
+'use strict';
+
+/**
+ * For consistency's sake, we replace positional operator `$` and array filters
+ * `$[]` and `$[foo]` with `0` when looking up schema paths.
+ */
+
+module.exports = function cleanPositionalOperators(path) {
+  return path.
+    replace(/\.\$(\[[^\]]*\])?\./g, '.0.').
+    replace(/\.(\[[^\]]*\])?\$$/g, '.0');
+};

node_modules/mongoose/lib/helpers/schema/getIndexes.js

@@ -0,0 +1,124 @@
+'use strict';
+
+const get = require('../get');
+const utils = require('../../utils');
+
+/*!
+ * Gather all indexes defined in the schema, including single nested,
+ * document arrays, and embedded discriminators.
+ */
+
+module.exports = function getIndexes(schema) {
+  let indexes = [];
+  const schemaStack = new WeakMap();
+  const indexTypes = schema.constructor.indexTypes;
+
+  const collectIndexes = function(schema, prefix) {
+    // Ignore infinitely nested schemas, if we've already seen this schema
+    // along this path there must be a cycle
+    if (schemaStack.has(schema)) {
+      return;
+    }
+    schemaStack.set(schema, true);
+
+    prefix = prefix || '';
+    const keys = Object.keys(schema.paths);
+    const length = keys.length;
+
+    for (let i = 0; i < length; ++i) {
+      const key = keys[i];
+      const path = schema.paths[key];
+
+      if (path.$isMongooseDocumentArray || path.$isSingleNested) {
+        if (get(path, 'options.excludeIndexes') !== true &&
+            get(path, 'schemaOptions.excludeIndexes') !== true) {
+          collectIndexes(path.schema, prefix + key + '.');
+        }
+
+        if (path.schema.discriminators != null) {
+          const discriminators = path.schema.discriminators;
+          const discriminatorKeys = Object.keys(discriminators);
+          for (const discriminatorKey of discriminatorKeys) {
+            collectIndexes(discriminators[discriminatorKey]._originalSchema,
+              prefix + key + '.');
+          }
+        }
+
+        // Retained to minimize risk of backwards breaking changes due to
+        // gh-6113
+        if (path.$isMongooseDocumentArray) {
+          continue;
+        }
+      }
+
+      const index = path._index || (path.caster && path.caster._index);
+
+      if (index !== false && index !== null && index !== undefined) {
+        const field = {};
+        const isObject = utils.isObject(index);
+        const options = isObject ? index : {};
+        const type = typeof index === 'string' ? index :
+          isObject ? index.type :
+            false;
+
+        if (type && indexTypes.indexOf(type) !== -1) {
+          field[prefix + key] = type;
+        } else if (options.text) {
+          field[prefix + key] = 'text';
+          delete options.text;
+        } else {
+          field[prefix + key] = 1;
+        }
+
+        delete options.type;
+        if (!('background' in options)) {
+          options.background = true;
+        }
+
+        indexes.push([field, options]);
+      }
+    }
+
+    schemaStack.delete(schema);
+
+    if (prefix) {
+      fixSubIndexPaths(schema, prefix);
+    } else {
+      schema._indexes.forEach(function(index) {
+        if (!('background' in index[1])) {
+          index[1].background = true;
+        }
+      });
+      indexes = indexes.concat(schema._indexes);
+    }
+  };
+
+  collectIndexes(schema);
+  return indexes;
+
+  /*!
+   * Checks for indexes added to subdocs using Schema.index().
+   * These indexes need their paths prefixed properly.
+   *
+   * schema._indexes = [ [indexObj, options], [indexObj, options] ..]
+   */
+
+  function fixSubIndexPaths(schema, prefix) {
+    const subindexes = schema._indexes;
+    const len = subindexes.length;
+    for (let i = 0; i < len; ++i) {
+      const indexObj = subindexes[i][0];
+      const keys = Object.keys(indexObj);
+      const klen = keys.length;
+      const newindex = {};
+
+      // use forward iteration, order matters
+      for (let j = 0; j < klen; ++j) {
+        const key = keys[j];
+        newindex[prefix + key] = indexObj[key];
+      }
+
+      indexes.push([newindex, subindexes[i][1]]);
+    }
+  }
+};

node_modules/mongoose/lib/helpers/schema/getPath.js

@@ -0,0 +1,35 @@
+'use strict';
+
+/*!
+ * Behaves like `Schema#path()`, except for it also digs into arrays without
+ * needing to put `.0.`, so `getPath(schema, 'docArr.elProp')` works.
+ */
+
+module.exports = function getPath(schema, path) {
+  let schematype = schema.path(path);
+  if (schematype != null) {
+    return schematype;
+  }
+
+  const pieces = path.split('.');
+  let cur = '';
+  let isArray = false;
+
+  for (const piece of pieces) {
+    if (/^\d+$/.test(piece) && isArray) {
+      continue;
+    }
+    cur = cur.length === 0 ? piece : cur + '.' + piece;
+
+    schematype = schema.path(cur);
+    if (schematype != null && schematype.schema) {
+      schema = schematype.schema;
+      cur = '';
+      if (schematype.$isMongooseDocumentArray) {
+        isArray = true;
+      }
+    }
+  }
+
+  return schematype;
+};

node_modules/mongoose/lib/helpers/schema/handleTimestampOption.js

@@ -0,0 +1,24 @@
+'use strict';
+
+module.exports = handleTimestampOption;
+
+/*!
+ * ignore
+ */
+
+function handleTimestampOption(arg, prop) {
+  if (arg == null) {
+    return null;
+  }
+
+  if (typeof arg === 'boolean') {
+    return prop;
+  }
+  if (typeof arg[prop] === 'boolean') {
+    return arg[prop] ? prop : null;
+  }
+  if (!(prop in arg)) {
+    return prop;
+  }
+  return arg[prop];
+}

node_modules/mongoose/lib/helpers/schema/merge.js

@@ -0,0 +1,19 @@
+'use strict';
+
+module.exports = function merge(s1, s2) {
+  s1.add(s2.obj);
+
+  s1.callQueue = s1.callQueue.concat(s2.callQueue);
+  s1.method(s2.methods);
+  s1.static(s2.statics);
+
+  for (const query in s2.query) {
+    s1.query[query] = s2.query[query];
+  }
+
+  for (const virtual in s2.virtuals) {
+    s1.virtuals[virtual] = s2.virtuals[virtual].clone();
+  }
+
+  s1.s.hooks.merge(s2.s.hooks, false);
+};

node_modules/mongoose/lib/helpers/setDefaultsOnInsert.js

@@ -0,0 +1,117 @@
+'use strict';
+
+const modifiedPaths = require('./common').modifiedPaths;
+
+/**
+ * Applies defaults to update and findOneAndUpdate operations.
+ *
+ * @param {Object} filter
+ * @param {Schema} schema
+ * @param {Object} castedDoc
+ * @param {Object} options
+ * @method setDefaultsOnInsert
+ * @api private
+ */
+
+module.exports = function(filter, schema, castedDoc, options) {
+  const keys = Object.keys(castedDoc || {});
+  const updatedKeys = {};
+  const updatedValues = {};
+  const numKeys = keys.length;
+  const modified = {};
+
+  let hasDollarUpdate = false;
+
+  options = options || {};
+
+  if (!options.upsert || !options.setDefaultsOnInsert) {
+    return castedDoc;
+  }
+
+  for (let i = 0; i < numKeys; ++i) {
+    if (keys[i].charAt(0) === '$') {
+      modifiedPaths(castedDoc[keys[i]], '', modified);
+      hasDollarUpdate = true;
+    }
+  }
+
+  if (!hasDollarUpdate) {
+    modifiedPaths(castedDoc, '', modified);
+  }
+
+  const paths = Object.keys(filter);
+  const numPaths = paths.length;
+  for (let i = 0; i < numPaths; ++i) {
+    const path = paths[i];
+    const condition = filter[path];
+    if (condition && typeof condition === 'object') {
+      const conditionKeys = Object.keys(condition);
+      const numConditionKeys = conditionKeys.length;
+      let hasDollarKey = false;
+      for (let j = 0; j < numConditionKeys; ++j) {
+        if (conditionKeys[j].charAt(0) === '$') {
+          hasDollarKey = true;
+          break;
+        }
+      }
+      if (hasDollarKey) {
+        continue;
+      }
+    }
+    updatedKeys[path] = true;
+    modified[path] = true;
+  }
+
+  if (options && options.overwrite && !hasDollarUpdate) {
+    // Defaults will be set later, since we're overwriting we'll cast
+    // the whole update to a document
+    return castedDoc;
+  }
+
+  schema.eachPath(function(path, schemaType) {
+    if (schemaType.$isSingleNested) {
+      // Only handle nested schemas 1-level deep to avoid infinite
+      // recursion re: https://github.com/mongodb-js/mongoose-autopopulate/issues/11
+      schemaType.schema.eachPath(function(_path, _schemaType) {
+        if (_path === '_id' && _schemaType.auto) {
+          // Ignore _id if auto id so we don't create subdocs
+          return;
+        }
+
+        const def = _schemaType.getDefault(null, true);
+        if (!isModified(modified, path + '.' + _path) &&
+            typeof def !== 'undefined') {
+          castedDoc = castedDoc || {};
+          castedDoc.$setOnInsert = castedDoc.$setOnInsert || {};
+          castedDoc.$setOnInsert[path + '.' + _path] = def;
+          updatedValues[path + '.' + _path] = def;
+        }
+      });
+    } else {
+      const def = schemaType.getDefault(null, true);
+      if (!isModified(modified, path) && typeof def !== 'undefined') {
+        castedDoc = castedDoc || {};
+        castedDoc.$setOnInsert = castedDoc.$setOnInsert || {};
+        castedDoc.$setOnInsert[path] = def;
+        updatedValues[path] = def;
+      }
+    }
+  });
+
+  return castedDoc;
+};
+
+function isModified(modified, path) {
+  if (modified[path]) {
+    return true;
+  }
+  const sp = path.split('.');
+  let cur = sp[0];
+  for (let i = 1; i < sp.length; ++i) {
+    if (modified[cur]) {
+      return true;
+    }
+    cur += '.' + sp[i];
+  }
+  return false;
+}

node_modules/mongoose/lib/helpers/symbols.js

@@ -0,0 +1,12 @@
+'use strict';
+
+exports.arrayAtomicsSymbol = Symbol('mongoose#Array#_atomics');
+exports.arrayParentSymbol = Symbol('mongoose#Array#_parent');
+exports.arrayPathSymbol = Symbol('mongoose#Array#_path');
+exports.arraySchemaSymbol = Symbol('mongoose#Array#_schema');
+exports.documentArrayParent = Symbol('mongoose:documentArrayParent');
+exports.getSymbol = Symbol('mongoose#Document#get');
+exports.modelSymbol = Symbol('mongoose#Model');
+exports.objectIdSymbol = Symbol('mongoose#ObjectId');
+exports.schemaTypeSymbol = Symbol('mongoose#schemaType');
+exports.validatorErrorSymbol = Symbol('mongoose:validatorError');

node_modules/mongoose/lib/helpers/update/applyTimestampsToChildren.js

@@ -0,0 +1,176 @@
+'use strict';
+
+const cleanPositionalOperators = require('../schema/cleanPositionalOperators');
+const handleTimestampOption = require('../schema/handleTimestampOption');
+
+module.exports = applyTimestampsToChildren;
+
+/*!
+ * ignore
+ */
+
+function applyTimestampsToChildren(now, update, schema) {
+  if (update == null) {
+    return;
+  }
+
+  const keys = Object.keys(update);
+  let key;
+  let createdAt;
+  let updatedAt;
+  let timestamps;
+  let path;
+
+  const hasDollarKey = keys.length && keys[0].charAt(0) === '$';
+
+  if (hasDollarKey) {
+    if (update.$push) {
+      for (key in update.$push) {
+        const $path = schema.path(key);
+        if (update.$push[key] &&
+            $path &&
+            $path.$isMongooseDocumentArray &&
+            $path.schema.options.timestamps) {
+          timestamps = $path.schema.options.timestamps;
+          createdAt = handleTimestampOption(timestamps, 'createdAt');
+          updatedAt = handleTimestampOption(timestamps, 'updatedAt');
+          if (update.$push[key].$each) {
+            update.$push[key].$each.forEach(function(subdoc) {
+              if (updatedAt != null) {
+                subdoc[updatedAt] = now;
+              }
+              if (createdAt != null) {
+                subdoc[createdAt] = now;
+              }
+            });
+          } else {
+            if (updatedAt != null) {
+              update.$push[key][updatedAt] = now;
+            }
+            if (createdAt != null) {
+              update.$push[key][createdAt] = now;
+            }
+          }
+        }
+      }
+    }
+    if (update.$set != null) {
+      const keys = Object.keys(update.$set);
+      for (key of keys) {
+        // Replace positional operator `$` and array filters `$[]` and `$[.*]`
+        const keyToSearch = cleanPositionalOperators(key);
+        path = schema.path(keyToSearch);
+        if (!path) {
+          continue;
+        }
+
+        let parentSchemaType = null;
+        const pieces = keyToSearch.split('.');
+        for (let i = pieces.length - 1; i > 0; --i) {
+          const s = schema.path(pieces.slice(0, i).join('.'));
+          if (s != null &&
+              (s.$isMongooseDocumentArray || s.$isSingleNested)) {
+            parentSchemaType = s;
+            break;
+          }
+        }
+
+        if (Array.isArray(update.$set[key]) && path.$isMongooseDocumentArray) {
+          applyTimestampsToDocumentArray(update.$set[key], path, now);
+        } else if (update.$set[key] && path.$isSingleNested) {
+          applyTimestampsToSingleNested(update.$set[key], path, now);
+        } else if (parentSchemaType != null) {
+          timestamps = parentSchemaType.schema.options.timestamps;
+          createdAt = handleTimestampOption(timestamps, 'createdAt');
+          updatedAt = handleTimestampOption(timestamps, 'updatedAt');
+
+          if (updatedAt == null) {
+            continue;
+          }
+
+          if (parentSchemaType.$isSingleNested) {
+            // Single nested is easy
+            update.$set[parentSchemaType.path + '.' + updatedAt] = now;
+            continue;
+          }
+
+          let childPath = key.substr(parentSchemaType.path.length + 1);
+
+          if (/^\d+$/.test(childPath)) {
+            update.$set[parentSchemaType.path + '.' + childPath][updatedAt] = now;
+            continue;
+          }
+
+          const firstDot = childPath.indexOf('.');
+          childPath = firstDot !== -1 ? childPath.substr(0, firstDot) : childPath;
+
+          update.$set[parentSchemaType.path + '.' + childPath + '.' + updatedAt] = now;
+        } else if (path.schema != null && path.schema != schema && update.$set[key]) {
+          timestamps = path.schema.options.timestamps;
+          createdAt = handleTimestampOption(timestamps, 'createdAt');
+          updatedAt = handleTimestampOption(timestamps, 'updatedAt');
+
+          if (updatedAt != null) {
+            update.$set[key][updatedAt] = now;
+          }
+          if (createdAt != null) {
+            update.$set[key][createdAt] = now;
+          }
+        }
+      }
+    }
+  } else {
+    const keys = Object.keys(update).filter(key => !key.startsWith('$'));
+    for (key of keys) {
+      // Replace positional operator `$` and array filters `$[]` and `$[.*]`
+      const keyToSearch = cleanPositionalOperators(key);
+      path = schema.path(keyToSearch);
+      if (!path) {
+        continue;
+      }
+
+      if (Array.isArray(update[key]) && path.$isMongooseDocumentArray) {
+        applyTimestampsToDocumentArray(update[key], path, now);
+      } else if (update[key] != null && path.$isSingleNested) {
+        applyTimestampsToSingleNested(update[key], path, now);
+      }
+    }
+  }
+}
+
+function applyTimestampsToDocumentArray(arr, schematype, now) {
+  const timestamps = schematype.schema.options.timestamps;
+
+  if (!timestamps) {
+    return;
+  }
+
+  const len = arr.length;
+
+  const createdAt = handleTimestampOption(timestamps, 'createdAt');
+  const updatedAt = handleTimestampOption(timestamps, 'updatedAt');
+  for (let i = 0; i < len; ++i) {
+    if (updatedAt != null) {
+      arr[i][updatedAt] = now;
+    }
+    if (createdAt != null) {
+      arr[i][createdAt] = now;
+    }
+  }
+}
+
+function applyTimestampsToSingleNested(subdoc, schematype, now) {
+  const timestamps = schematype.schema.options.timestamps;
+  if (!timestamps) {
+    return;
+  }
+
+  const createdAt = handleTimestampOption(timestamps, 'createdAt');
+  const updatedAt = handleTimestampOption(timestamps, 'updatedAt');
+  if (updatedAt != null) {
+    subdoc[updatedAt] = now;
+  }
+  if (createdAt != null) {
+    subdoc[createdAt] = now;
+  }
+}

node_modules/mongoose/lib/helpers/update/applyTimestampsToUpdate.js

@@ -0,0 +1,65 @@
+'use strict';
+
+/*!
+ * ignore
+ */
+
+const get = require('../get');
+
+module.exports = applyTimestampsToUpdate;
+
+/*!
+ * ignore
+ */
+
+function applyTimestampsToUpdate(now, createdAt, updatedAt, currentUpdate, options) {
+  const updates = currentUpdate;
+  let _updates = updates;
+  const overwrite = get(options, 'overwrite', false);
+  const timestamps = get(options, 'timestamps', true);
+
+  // Support skipping timestamps at the query level, see gh-6980
+  if (!timestamps || updates == null) {
+    return currentUpdate;
+  }
+
+  if (overwrite) {
+    if (currentUpdate && currentUpdate.$set) {
+      currentUpdate = currentUpdate.$set;
+      updates.$set = {};
+      _updates = updates.$set;
+    }
+    if (updatedAt && !currentUpdate[updatedAt]) {
+      _updates[updatedAt] = now;
+    }
+    if (createdAt && !currentUpdate[createdAt]) {
+      _updates[createdAt] = now;
+    }
+    return updates;
+  }
+  updates.$set = updates.$set || {};
+  currentUpdate = currentUpdate || {};
+
+  if (updatedAt &&
+      (!currentUpdate.$currentDate || !currentUpdate.$currentDate[updatedAt])) {
+    updates.$set[updatedAt] = now;
+  }
+
+  if (createdAt) {
+    if (currentUpdate[createdAt]) {
+      delete currentUpdate[createdAt];
+    }
+    if (currentUpdate.$set && currentUpdate.$set[createdAt]) {
+      delete currentUpdate.$set[createdAt];
+    }
+
+    updates.$setOnInsert = updates.$setOnInsert || {};
+    updates.$setOnInsert[createdAt] = now;
+  }
+
+  if (Object.keys(updates.$set).length === 0) {
+    delete updates.$set;
+  }
+
+  return updates;
+}

node_modules/mongoose/lib/helpers/update/castArrayFilters.js

@@ -1,6 +1,8 @@
 'use strict';
 
 const castFilterPath = require('../query/castFilterPath');
+const cleanPositionalOperators = require('../schema/cleanPositionalOperators');
+const getPath = require('../schema/getPath');
 const modifiedPaths = require('./modifiedPaths');
 
 module.exports = function castArrayFilters(query) {
@@ -11,6 +13,7 @@ module.exports = function castArrayFilters(query) {
 
   const update = query.getUpdate();
   const schema = query.schema;
+  const strictQuery = schema.options.strictQuery;
 
   const updatedPaths = modifiedPaths(update);
 
@@ -24,7 +27,9 @@ module.exports = function castArrayFilters(query) {
       if (firstMatch !== path.lastIndexOf(match)) {
         throw new Error(`Path '${path}' contains the same array filter multiple times`);
       }
-      cur[match.substring(2, match.length - 1)] = path.substr(0, firstMatch - 1);
+      cur[match.substring(2, match.length - 1)] = path.
+        substr(0, firstMatch - 1).
+        replace(/\$\[[^\]]+\]/g, '0');
     }
     return cur;
   }, {});
@@ -50,13 +55,23 @@ module.exports = function castArrayFilters(query) {
 
     // If there are multiple array filters in the path being updated, make sure
     // to replace them so we can get the schema path.
-    filterPath = filterPath.replace(/\$\[[^\]]+\]/g, '0');
+    filterPath = cleanPositionalOperators(filterPath);
 
-    const schematype = schema.path(filterPath);
+    const schematype = getPath(schema, filterPath);
+    if (schematype == null) {
+      if (!strictQuery) {
+        return;
+      }
+      // For now, treat `strictQuery = true` and `strictQuery = 'throw'` as
+      // equivalent for casting array filters. `strictQuery = true` doesn't
+      // quite work in this context because we never want to silently strip out
+      // array filters, even if the path isn't in the schema.
+      throw new Error(`Could not find path "${filterPath}" in schema`);
+    }
     if (typeof filter[firstKey] === 'object') {
       filter[firstKey] = castFilterPath(query, schematype, filter[firstKey]);
     } else {
       filter[firstKey] = schematype.castForQuery(filter[firstKey]);
     }
   }
-};
+};

node_modules/mongoose/lib/helpers/update/modifiedPaths.js

@@ -0,0 +1,33 @@
+'use strict';
+
+const _modifiedPaths = require('../common').modifiedPaths;
+
+/**
+ * Given an update document with potential update operators (`$set`, etc.)
+ * returns an object whose keys are the directly modified paths.
+ *
+ * If there are any top-level keys that don't start with `$`, we assume those
+ * will get wrapped in a `$set`. The Mongoose Query is responsible for wrapping
+ * top-level keys in `$set`.
+ *
+ * @param {Object} update
+ * @return {Object} modified
+ */
+
+module.exports = function modifiedPaths(update) {
+  const keys = Object.keys(update);
+  const res = {};
+
+  const withoutDollarKeys = {};
+  for (const key of keys) {
+    if (key.startsWith('$')) {
+      _modifiedPaths(update[key], '', res);
+      continue;
+    }
+    withoutDollarKeys[key] = update[key];
+  }
+
+  _modifiedPaths(withoutDollarKeys, '', res);
+
+  return res;
+};

node_modules/mongoose/lib/helpers/updateValidators.js

@@ -0,0 +1,228 @@
+'use strict';
+
+/*!
+ * Module dependencies.
+ */
+
+const Mixed = require('../schema/mixed');
+const ValidationError = require('../error/validation');
+const cleanPositionalOperators = require('./schema/cleanPositionalOperators');
+const flatten = require('./common').flatten;
+const modifiedPaths = require('./common').modifiedPaths;
+const parallel = require('async/parallel');
+
+/**
+ * Applies validators and defaults to update and findOneAndUpdate operations,
+ * specifically passing a null doc as `this` to validators and defaults
+ *
+ * @param {Query} query
+ * @param {Schema} schema
+ * @param {Object} castedDoc
+ * @param {Object} options
+ * @method runValidatorsOnUpdate
+ * @api private
+ */
+
+module.exports = function(query, schema, castedDoc, options) {
+  let _keys;
+  const keys = Object.keys(castedDoc || {});
+  let updatedKeys = {};
+  let updatedValues = {};
+  const isPull = {};
+  const arrayAtomicUpdates = {};
+  const numKeys = keys.length;
+  let hasDollarUpdate = false;
+  const modified = {};
+  let currentUpdate;
+  let key;
+  let i;
+
+  for (i = 0; i < numKeys; ++i) {
+    if (keys[i].charAt(0) === '$') {
+      hasDollarUpdate = true;
+      if (keys[i] === '$push' || keys[i] === '$addToSet') {
+        _keys = Object.keys(castedDoc[keys[i]]);
+        for (let ii = 0; ii < _keys.length; ++ii) {
+          currentUpdate = castedDoc[keys[i]][_keys[ii]];
+          if (currentUpdate && currentUpdate.$each) {
+            arrayAtomicUpdates[_keys[ii]] = (arrayAtomicUpdates[_keys[ii]] || []).
+              concat(currentUpdate.$each);
+          } else {
+            arrayAtomicUpdates[_keys[ii]] = (arrayAtomicUpdates[_keys[ii]] || []).
+              concat([currentUpdate]);
+          }
+        }
+        continue;
+      }
+      modifiedPaths(castedDoc[keys[i]], '', modified);
+      const flat = flatten(castedDoc[keys[i]]);
+      const paths = Object.keys(flat);
+      const numPaths = paths.length;
+      for (let j = 0; j < numPaths; ++j) {
+        const updatedPath = cleanPositionalOperators(paths[j]);
+        key = keys[i];
+        // With `$pull` we might flatten `$in`. Skip stuff nested under `$in`
+        // for the rest of the logic, it will get handled later.
+        if (updatedPath.indexOf('$') !== -1) {
+          continue;
+        }
+        if (key === '$set' || key === '$setOnInsert' ||
+            key === '$pull' || key === '$pullAll') {
+          updatedValues[updatedPath] = flat[paths[j]];
+          isPull[updatedPath] = key === '$pull' || key === '$pullAll';
+        } else if (key === '$unset') {
+          updatedValues[updatedPath] = undefined;
+        }
+        updatedKeys[updatedPath] = true;
+      }
+    }
+  }
+
+  if (!hasDollarUpdate) {
+    modifiedPaths(castedDoc, '', modified);
+    updatedValues = flatten(castedDoc);
+    updatedKeys = Object.keys(updatedValues);
+  }
+
+  const updates = Object.keys(updatedValues);
+  const numUpdates = updates.length;
+  const validatorsToExecute = [];
+  const validationErrors = [];
+
+  const alreadyValidated = [];
+
+  const context = options && options.context === 'query' ? query : null;
+  function iter(i, v) {
+    const schemaPath = schema._getSchema(updates[i]);
+    if (schemaPath == null) {
+      return;
+    }
+
+    // gh-4305: `_getSchema()` will report all sub-fields of a 'Mixed' path
+    // as 'Mixed', so avoid double validating them.
+    if (schemaPath instanceof Mixed && schemaPath.$fullPath !== updates[i]) {
+      return;
+    }
+
+    if (v && Array.isArray(v.$in)) {
+      v.$in.forEach((v, i) => {
+        validatorsToExecute.push(function(callback) {
+          schemaPath.doValidate(
+            v,
+            function(err) {
+              if (err) {
+                err.path = updates[i] + '.$in.' + i;
+                validationErrors.push(err);
+              }
+              callback(null);
+            },
+            context,
+            {updateValidator: true});
+        });
+      });
+    } else {
+      if (isPull[updates[i]] &&
+          schemaPath.$isMongooseArray) {
+        return;
+      }
+
+      if (schemaPath.$isMongooseDocumentArrayElement && v != null && v.$__ != null) {
+        alreadyValidated.push(updates[i]);
+        validatorsToExecute.push(function(callback) {
+          schemaPath.doValidate(v, function(err) {
+            if (err) {
+              err.path = updates[i];
+              validationErrors.push(err);
+              return callback(null);
+            }
+
+            v.validate(function(err) {
+              if (err) {
+                if (err.errors) {
+                  for (const key of Object.keys(err.errors)) {
+                    const _err = err.errors[key];
+                    _err.path = updates[i] + '.' + key;
+                    validationErrors.push(_err);
+                  }
+                }
+              }
+              callback(null);
+            });
+          }, context, { updateValidator: true });
+        });
+      } else {
+        validatorsToExecute.push(function(callback) {
+          for (const path of alreadyValidated) {
+            if (updates[i].startsWith(path + '.')) {
+              return callback(null);
+            }
+          }
+          schemaPath.doValidate(v, function(err) {
+            if (err) {
+              err.path = updates[i];
+              validationErrors.push(err);
+            }
+            callback(null);
+          }, context, { updateValidator: true });
+        });
+      }
+    }
+  }
+  for (i = 0; i < numUpdates; ++i) {
+    iter(i, updatedValues[updates[i]]);
+  }
+
+  const arrayUpdates = Object.keys(arrayAtomicUpdates);
+  const numArrayUpdates = arrayUpdates.length;
+  for (i = 0; i < numArrayUpdates; ++i) {
+    (function(i) {
+      let schemaPath = schema._getSchema(arrayUpdates[i]);
+      if (schemaPath && schemaPath.$isMongooseDocumentArray) {
+        validatorsToExecute.push(function(callback) {
+          schemaPath.doValidate(
+            arrayAtomicUpdates[arrayUpdates[i]],
+            function(err) {
+              if (err) {
+                err.path = arrayUpdates[i];
+                validationErrors.push(err);
+              }
+              callback(null);
+            },
+            options && options.context === 'query' ? query : null);
+        });
+      } else {
+        schemaPath = schema._getSchema(arrayUpdates[i] + '.0');
+        for (let j = 0; j < arrayAtomicUpdates[arrayUpdates[i]].length; ++j) {
+          (function(j) {
+            validatorsToExecute.push(function(callback) {
+              schemaPath.doValidate(
+                arrayAtomicUpdates[arrayUpdates[i]][j],
+                function(err) {
+                  if (err) {
+                    err.path = arrayUpdates[i];
+                    validationErrors.push(err);
+                  }
+                  callback(null);
+                },
+                options && options.context === 'query' ? query : null,
+                { updateValidator: true });
+            });
+          })(j);
+        }
+      }
+    })(i);
+  }
+
+  return function(callback) {
+    parallel(validatorsToExecute, function() {
+      if (validationErrors.length) {
+        const err = new ValidationError(null);
+        for (let i = 0; i < validationErrors.length; ++i) {
+          err.addError(validationErrors[i].path, validationErrors[i]);
+        }
+        return callback(err);
+      }
+      callback(null);
+    });
+  };
+};