ember hasMany and plurals

Question

Lost.Router.map(function() {
  this.resource('countries',{path: '/'}, function(){
     this.resource('country',{path: ':country_id'},function(){
      this.resource('city',{path: ':city_id'});
    });
  });
});

My country model is

  Lost.Country = DS.Model.extend({
      countryCode: DS.attr('string'),
      countryName: DS.attr('string'),
      places: DS.hasMany('place')
    });

and my place model is

Lost.Place = DS.Model.extend({
  cityName: DS.attr('string'),  
  country: DS.belongsTo('country')
});

In country model when I change places to place this work fine but when i keep it as places I get error

TypeError: Cannot set property 'store' of undefined

DEBUG: Ember      : 1.6.0-beta.1+canary.3bcd9bdc 
DEBUG: Ember Data : 1.0.0-beta.7+canary.d5562867 
DEBUG: Handlebars : 1.3.0 
DEBUG: jQuery     : 1.11.0

UPDATED

The object returned from rails server

Acual JSON:

{
   "countries":[
      {
         "id":1,
         "countryCode":"BH",
         "countryName":"Bhutan",
         "places":[
            {
               "id":1,
               "country_id":1,
               "cityName":"Daga"
            },
            {
               "id":2,
               "country_id":1,
               "cityName":"Ha"
            }
         ]
      }
   ]
}

Here is how my rails serializers looks

application_serializer.rb

class ApplicationSerializer < ActiveModel::Serializer
  embed :ids, :include => true
end

country_serializer.rb

class CountrySerializer < ActiveModel::Serializer
  attributes :id, :countryCode, :countryName
  has_many :places
end

place_serializer

class PlaceSerializer < ActiveModel::Serializer
  attributes :id, :country_id, :cityName
  #belongs_to :country #commented out because gives error"undefine method belongs_to"
                       #if i change it to has_one gives error"stack level too deep"
end

* *Additon to anwer ** this question has been answered by @kingpin2k as a part of answer if you are new developer like me instead of writing your own normalizeAttribute function I think it will be better to use already exsisting normalizeAtrribute function in DS.RESTAdapter present in ember-data. less error prone. Just copy pasting it worked for me

Ember Data : 1.0.0-beta.6

will you add the actual json returned, that may help identify the issue. — Kingpin2k
added the actual json.I referred to emberjs docs again and It shows hasMany key should be in plural i.e "places" in my case. and the slides I am refering to learn says sideloading is done by default. I am not able to achieve both. slide#12 of speakerd.s3.amazonaws.com/presentations/… — Rigel
Can you show the client side adapter you're using? App.ApplicationAdapter = DS.RESTAdapter.extend(); — Kingpin2k
places should match whatever the key name is on the model definition. — Kingpin2k

Kingpin2k Kingpin2k · Accepted Answer · 2014-03-30T18:11:29

Lost.Place = DS.Model.extend({
  cityName: DS.attr('string'),  
  country: DS.belongsTo('Country')
});

should be (lower case country)

Lost.Place = DS.Model.extend({
  cityName: DS.attr('string'),  
  country: DS.belongsTo('country')
});

and I can't tell from your question, but the json should be an array of ids for place.

If you're using the ActiveModelSerializer then you can set the embedded to always, which is how you're trying to return it. You're data is causing some hiccups, in that it sees countryCode as country_code, but you can override some functions to fix up this validation, or you can fix up your json to match the expected data.

App.ApplicationAdapter= DS.ActiveModelAdapter;

App.ApplicationSerializer = DS.ActiveModelSerializer.extend(DS.EmbeddedRecordsMixin, {
  attrs: {
    places: {embedded: 'always'}
  },
  normalizeAttributes: function(type, hash) {
   //your attributes shouldn't be normalized
  }
});

Lost.Country = DS.Model.extend({
  countryCode: DS.attr('string'),
  countryName: DS.attr('string'),
  places: DS.hasMany('place')
});

http://emberjs.jsbin.com/OxIDiVU/342/edit

ember hasMany and plurals

1 Answers