Mongoose: access model.update in schema method?

Created on 28 Nov 2011 · 6Comments · Source: Automattic/mongoose

schema.methods.mySave = function(){
// dostuffhere
this.save()
}
schema.methods.myRemove = function(){
// dostuffhere
this.remove()
}
schema.methods.myUpdate = function(){
// dostuffhere
this.update()
}

first 2 work, but i can't access update within the schema method

Source

gocoffeecup

Most helpful comment

schema.methods.inc = function (howMany, callback) {
  var query = { _id: this._id };
  var update = { $inc: { count: howMany }};
  this.constructor.update(query, update, callback);

  // in v3 
  // this.update(update, callback)
}

aheckmann on 16 Jul 2012

👍3

All 6 comments

Also interested in this. Can anyone confirm?

jockster on 24 Jan 2012

this.save() handles updates transparently. otherwise you'd use Model.update for that.

aheckmann on 26 Jan 2012

@aheckmann - can you elaborate on how you would use Model.update in this context? (instance method). In particular I'm interested in having the model instance increment one of it's fields.

srlowe on 16 Jul 2012

schema.methods.inc = function (howMany, callback) {
  var query = { _id: this._id };
  var update = { $inc: { count: howMany }};
  this.constructor.update(query, update, callback);

  // in v3 
  // this.update(update, callback)
}

aheckmann on 16 Jul 2012

👍3

Doesn't seem to work in 5.1.1:

TypeError: this.constructor.update is not a function

returned by:

UserSchema.methods = {
...
    addPoints: async () => {
        ...
        await this.constructor.update({ _id: this._id }, {
                $inc: incObj
            }, { new: true }).exec();
        ...
    }
}

kerberjg on 17 Apr 2018

@kerberjg there is no 5.1.1 release at the time of this writing. Also, get rid of the arrow function for addPoints and it should work because of how arrow functions handle this

UserSchema.methods = {
...
    addPoints: async function() {
        ...
        await this.constructor.update({ _id: this._id }, {
                $inc: incObj
            }, { new: true }).exec();
        ...
    }
}