Ember-data: inline model deserialization
I don't really understand it here.
I have the following code:
App.Instance = DS.Model.extend({
hash: DS.attr('string'),
users: DS.hasMany('user', { embedded: 'always' })
});
App.User = DS.Model.extend({
name: DS.attr('string'),
color: DS.attr('string'),
lat: DS.attr('number'),
lng: DS.attr('number'),
instance: DS.belongsTo('instance')
});
App.InstanceSerializer = DS.RESTSerializer.extend(DS.EmbeddedRecordsMixin, {
attrs: {
users: { embedded: 'always' }
}
});
And an example is this:
var instance = {
hash: "68309966ec7fbaac",
id: "54b4518fcbe12d5160771ebe",
users: [{
color: "#9E463C",
id: "78b662bc56169a96",
lat: 36.5299487,
lng: -6.2921774,
name: "User 1"
},{
color: "#9E463C",
id: "78b662bc56169a96",
lat: 36.5299487,
lng: -6.2921774,
name: "User 2"
}]
}
But when I want store.push('instance', instance);
, I get:
Unaccepted Error: Assertion Failed: Ember Data is expecting a number or string to represent the record (s) in a relationship
users
, it encountered an object instead. If it's a polymorphic relationship, provide a keytype
. If this is a built-in link, please includeDS.EmbeddedRecordsMixin
and specify the propertyusers
in your serialization parameterizer
Where is the mistake?
Read from all of these sources, which always use a different strategy:
- http://emberjs.com/api/data/classes/DS.EmbeddedRecordsMixin.html
- How to make built-in hasMany relationships with ember data
- Ember-data Serialize / Deserialize inline records at 3rd level
Thank you so much
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As from this article: http://mozmonkey.com/2013/12/loading-json-with-embedded-records-into-ember-data-1-0-0-beta/ ember wants to disable your data somehow:
var data = {
instance: {
hash: "68309966ec7fbaac",
id: "54b4518fcbe12d5160771ebe",
users: ["78b662bc56169a96", "78b662bc56169a97"]
},
users: [{
color: "#9E463C",
id: "78b662bc56169a96",
lat: 36.5299487,
lng: -6.2921774,
name: "User 1"
},{
color: "#9E463C",
id: "78b662bc56169a96",
lat: 36.5299487,
lng: -6.2921774,
name: "User 2"
}]
}
It's easy to do here:
for (var i=0; i < data.users.length; i++) {
store.push('user', data.users[i]);
}
store.push('instance', data.instance);
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create serializable serialization inside folder. The name for serialization is the same as your model.
import DS from 'ember-data';
export default DS.RESTSerializer.extend(DS.EmbeddedRecordsMixin, {
hasEmbeddedAlwaysOption: function(attr) {
var option = this.attrsOption(attr);
if (typeof(option) === 'undefined') {
return true;
} else if (option.embedded === false) {
return false;
}
return this._super.apply(this, arguments);
},
noSerializeOptionSpecified: function(attr) {
var option = this.attrsOption(attr);
if (typeof(option) === 'undefined') {
return false;
} else if (option.embedded === false && !!option.serialize) {
return true;
}
return this._super.apply(this, arguments);
}
});
This happens when you have objects inside an object. If you don't want to create a class like this for every model that has objects within objects, copy this code into application.js inside the serializers folder.
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