How to do raw mongodb operations in mongoose?

Question

I'm asking this because when I write unit tests, I want to drop the test database and insert some initialize data, and also check the data in mongodb in testing. So I need raw operations to mongodb.

How to do this in mongoose? What I can do now is just create the connection, and not find any document in mongoose's official site.

 var mongoose = require('mongoose');
 mongoose.connect('mongo://localhost/shuzu_test');

 // get the connection
 var conn = mongoose.connection;

But how to:

1. drop the database
2. create a collection
3. write some data to a collection
4. query a collection
5. drop a collection

Answer 1

You can run mongodb commands using the native NodeJS driver by using mongoose.connection.db. This accesses the NodeJS MongoDB driver, and you don't need to create a mongoose model.

An insert

mongoose.connection.db.collection('userCollection').insert({
  username: 'captain1',
  firstName: 'Steve',
  lastName: 'Rogers', 
});

An update

mongoose.connection.db.collection('userCollection').update(
  {someFilterProperty: true},
  {$set: {
     siteId: new mongoose.mongo.ObjectId('56cb91bdc5946f14678934ba'),
     hasNewSiteId: true}},
  {multi: true});
});

You can send every command specific to that database using the database connection db reference mongoose.connection.db.

This is the mongoose API doc: http://mongoosejs.com/docs/api.html#connection_Connection-db

Important: Note some of the options in the NodeJS driver are different than the options in MongoDB shell commands. For example findOneAndUpdate() uses returnOriginal instead of returnNewDocument. See here and here for more on this.