Question

Models:

class Device extends Backbone.Model
    url: '/device'
    initialize: ->
        console.log "Device model created..."
        @set
            controllers: new Controllers

class Controller extends Backbone.Model

Collection:

class Controllers extends Backbone.Collection
    model: Controller

Code:

device = new Device
controller = new Controller
controller1 = new Controller
controller.set
   name: "state1"
   value: "on"
controller1.set
   name: "state2"
   value: "on"
device.set 
   id: 1
   name: "foo"
   controllers: [controller, controller1]

Error message (when using .each on “controllers”):

TypeError: Object [object Object],[object Object] has no method ‘each’

The idea is that each Device holds a sub collection of controllers. My simple question is how to add models to this sub collection? The code above seems to override the collection with an array…

Answer 1

You’re replacing the attribute controllers with an array. Since its a collection, you need to use either add or reset, depending on what you want to do.