Ember.js array as model's property

Question

Cheers! I have some model, and one attribute of it is an array, but for some reasons (I use mongoDB on the server and it's problem with embedded models and ember-data) I can't do somthing like this:

App.Foo = DS.Model.extend({
  ...
  numbers: DS.hasMany('App.Bar')
)};

App.Bar = DS.Model.extend({
  ...
  number: DS.attr('number')
});

I need something like this:

App.Bar = DS.Model.extend({
  numbers: DS.attr('array')
});

But there is no array type of attributes in ember-data, how to be?

Solution 1

I found that actually you can have array properties out of the box by just not specifying a type.

#coffeescript

AskuWhiteLabel.SomeModel = DS.Model.extend
    some_ids: DS.attr()

I'm using this, and when I do this

myModel.set('some_ids', [1,2,3])
myModel.save()

The payload to the server is indeed my array as is.

Solution 2

For those, who have the same problem as me: check out this answer:

https://stackoverflow.com/a/13884238/1662820

Or you can pass embedded models with hasMany relation and set custom primary key for embedded model in the adapter ('number' in my case). Look at this tests:

https://github.com/emberjs/data/blob/master/packages/ember-data/tests/integration/embedded/embedded_without_ids_test.js

Solution 3

anArrayAttr: DS.attr('raw', { defaultValue: function() { return []; } })

From my awesome colleague 'Theron Humiston'

Comments

[xamenrax]

Cheers, Andy, I asked this question on Feb 14 '13, so it's it could be outdated or smth.

[andy]

@nikita no problem! Yeah I didn't find any documentation around it, I think I just tried it out. Hope it helps!

[inquisitive]

Yeah it helps me though :D

[Ember Freak]

what is raw ? did you define custom transform?

[Epirocks]

DS.attr() on its own was enough