änderung1

venv/lib/python3.7/site-packages/django/contrib/postgres/fields/citext.py

@@ -0,0 +1,24 @@
+from django.db.models import CharField, EmailField, TextField
+
+__all__ = ['CICharField', 'CIEmailField', 'CIText', 'CITextField']
+
+
+class CIText:
+
+    def get_internal_type(self):
+        return 'CI' + super().get_internal_type()
+
+    def db_type(self, connection):
+        return 'citext'
+
+
+class CICharField(CIText, CharField):
+    pass
+
+
+class CIEmailField(CIText, EmailField):
+    pass
+
+
+class CITextField(CIText, TextField):
+    pass

venv/lib/python3.7/site-packages/django/contrib/postgres/fields/hstore.py

@@ -0,0 +1,112 @@
+import json
+
+from django.contrib.postgres import forms, lookups
+from django.contrib.postgres.fields.array import ArrayField
+from django.core import exceptions
+from django.db.models import Field, TextField, Transform
+from django.utils.translation import gettext_lazy as _
+
+from .mixins import CheckFieldDefaultMixin
+
+__all__ = ['HStoreField']
+
+
+class HStoreField(CheckFieldDefaultMixin, Field):
+    empty_strings_allowed = False
+    description = _('Map of strings to strings/nulls')
+    default_error_messages = {
+        'not_a_string': _('The value of "%(key)s" is not a string or null.'),
+    }
+    _default_hint = ('dict', '{}')
+
+    def db_type(self, connection):
+        return 'hstore'
+
+    def get_transform(self, name):
+        transform = super().get_transform(name)
+        if transform:
+            return transform
+        return KeyTransformFactory(name)
+
+    def validate(self, value, model_instance):
+        super().validate(value, model_instance)
+        for key, val in value.items():
+            if not isinstance(val, str) and val is not None:
+                raise exceptions.ValidationError(
+                    self.error_messages['not_a_string'],
+                    code='not_a_string',
+                    params={'key': key},
+                )
+
+    def to_python(self, value):
+        if isinstance(value, str):
+            value = json.loads(value)
+        return value
+
+    def value_to_string(self, obj):
+        return json.dumps(self.value_from_object(obj))
+
+    def formfield(self, **kwargs):
+        return super().formfield(**{
+            'form_class': forms.HStoreField,
+            **kwargs,
+        })
+
+    def get_prep_value(self, value):
+        value = super().get_prep_value(value)
+
+        if isinstance(value, dict):
+            prep_value = {}
+            for key, val in value.items():
+                key = str(key)
+                if val is not None:
+                    val = str(val)
+                prep_value[key] = val
+            value = prep_value
+
+        if isinstance(value, list):
+            value = [str(item) for item in value]
+
+        return value
+
+
+HStoreField.register_lookup(lookups.DataContains)
+HStoreField.register_lookup(lookups.ContainedBy)
+HStoreField.register_lookup(lookups.HasKey)
+HStoreField.register_lookup(lookups.HasKeys)
+HStoreField.register_lookup(lookups.HasAnyKeys)
+
+
+class KeyTransform(Transform):
+    output_field = TextField()
+
+    def __init__(self, key_name, *args, **kwargs):
+        super().__init__(*args, **kwargs)
+        self.key_name = key_name
+
+    def as_sql(self, compiler, connection):
+        lhs, params = compiler.compile(self.lhs)
+        return '(%s -> %%s)' % lhs, tuple(params) + (self.key_name,)
+
+
+class KeyTransformFactory:
+
+    def __init__(self, key_name):
+        self.key_name = key_name
+
+    def __call__(self, *args, **kwargs):
+        return KeyTransform(self.key_name, *args, **kwargs)
+
+
+@HStoreField.register_lookup
+class KeysTransform(Transform):
+    lookup_name = 'keys'
+    function = 'akeys'
+    output_field = ArrayField(TextField())
+
+
+@HStoreField.register_lookup
+class ValuesTransform(Transform):
+    lookup_name = 'values'
+    function = 'avals'
+    output_field = ArrayField(TextField())

venv/lib/python3.7/site-packages/django/contrib/postgres/fields/mixins.py

@@ -0,0 +1,29 @@
+from django.core import checks
+
+
+class CheckFieldDefaultMixin:
+    _default_hint = ('<valid default>', '<invalid default>')
+
+    def _check_default(self):
+        if self.has_default() and self.default is not None and not callable(self.default):
+            return [
+                checks.Warning(
+                    "%s default should be a callable instead of an instance so "
+                    "that it's not shared between all field instances." % (
+                        self.__class__.__name__,
+                    ),
+                    hint=(
+                        'Use a callable instead, e.g., use `%s` instead of '
+                        '`%s`.' % self._default_hint
+                    ),
+                    obj=self,
+                    id='postgres.E003',
+                )
+            ]
+        else:
+            return []
+
+    def check(self, **kwargs):
+        errors = super().check(**kwargs)
+        errors.extend(self._check_default())
+        return errors

venv/lib/python3.7/site-packages/django/contrib/postgres/fields/utils.py

@@ -0,0 +1,3 @@
+class AttributeSetter:
+    def __init__(self, name, value):
+        setattr(self, name, value)