om/mong.js

db = db.getSiblingDB('omdb')

db.messages.insert([
    {"subject":"DOLORE LABORIS AUTE","message":"Ex sunt elit elit in ex ad labore minim. Elit amet irure sit aliquip excepteur sit qui et aute qui mollit cillum.","user":"Jaime Potter","tag":["sit","in","dolore","ullamco"]},
    {"subject":"NON IPSUM MOLLIT","message":"Ut laborum proident magna magna qui non in voluptate reprehenderit labore. Qui consectetur dolor nisi culpa cillum quis.","user":"Goff Durham","tag":["aliqua","sunt","labore","minim"]},
    {"subject": "ESSE IPSUM INCIDIDUNT","message":"Esse enim amet laboris proident do do ut cupidatat laborum ex. Sit esse id laborum aliqua id.","user":"Helena Mercado","tag":["fugiat","nisi","incididunt","ullamco"]},
    {"subject":"PARIATUR DOLOR SUNT","message":"Exercitation officia ad consequat est voluptate est incididunt ut culpa consectetur. Consectetur irure veniam ipsum sint sit anim minim aute exercitation ullamco nostrud reprehenderit consequat.","user":"Christi Walker","tag":["consectetur","sint","qui","ipsum"]},
    {"subject":"TEMPOR ID VOLUPTATE","message":"Anim ex commodo officia consequat in magna esse sunt mollit sunt commodo. Ex sit aute reprehenderit elit magna sunt irure pariatur cupidatat labore.","user":"Kent Schroeder","tag":["adipisicing","nulla","tempor","veniam"]},
    {"subject":"LOREM EST AUTE","message":"Irure excepteur laborum quis tempor officia cillum officia est ea adipisicing duis enim aliqua. Est dolor laborum officia elit ullamco.","user":"Dominguez Stevens","tag":["mollit","amet","consectetur","dolore"]},
    {"subject":"ESSE MOLLIT CILLUM","message":"Eu culpa laborum consequat sunt aliqua excepteur. Voluptate pariatur deserunt consequat id nostrud do magna occaecat sint nulla non nostrud.","user":"Terrell Padilla","tag":["Lorem","consequat","fugiat","aliqua"]}
])

db.tags.insert([
    {"name":"Lorem"},{"name":"fugiat"},{"name":"aliqua"},{"name":"consequat"},{"name":"mollit"},{"name":"aet"},{"name":"consectetur"},{"name":"dolore"},{"name":"nulla"},{"name":"tempor"},{"name":"veniam"},{"name":"ipsum"},{"name":"adipisicing"},{"name":"qui"},{"name":"sint"},{"name":"ullamco"},{"name":"incididunt"},{"name":"nisi"},{"name":"sit"},{"name":"minim"},{"name":"labore"},{"name":"sunt"},{"name":"in"}
])

var collections = db.getCollectionNames();
print('Collections inside the db:');
for(var i = 0; i < collections.length; i++){
  var name = collections[i];

  if(name.substr(0, 6) != 'system')
    print(name + ' - ' + db[name].count() + ' records');
}