Mongoose middleware access other colletion

Question

Mongoose middleware access other colletion

I am using 'pre' 'save' middleware to create for a 'user' document a corresponding 'userObjects' document.

So there is users collections and userObjects. And when new user is inserted a userObjects document should be inserted too.

I am trying to use the 'pre' middleware, somehow like this :

//before inserting a new user
Users.pre('save', function(next) {
    var UserObjects = db.model('userObjects');

    userObjectsIns = new UserObjects({
         'userID': this._id,
         'myObjects':[],
    });

    userObjectsIns.save( function(err) {
        if (err) console.log("ERROR while saving userObjectsIns: " + err);
        next()
    })        
});

The obvious problem, is that db doesn't exists. How can I reach 'userObjects' collection from within this pre middleware?

node.js
mongodb
mongoose

Answer 1

You can access other models via the model method of the this doc instance:

Users.pre('save', function(next) {
    var UserObjects = this.model('userObjects');

    userObjectsIns = new UserObjects({
         'userID': this._id,
         'myObjects':[],
    });

    userObjectsIns.save( function(err) {
        if (err) console.log("ERROR while saving userObjectsIns: " + err);
        next()
    })        
});