Ember data: save loses belongsTo relationship

Question

I have the following problem:

A form with a select field for selecting the category of a post. Let's say the post has category 100. In Ember inspector, this is shown as follows:

category: <App.Category:ember708:100>

When I save the post (via Ember Data 1.0.0 beta 2), the category suddenly changes to:

category: 100

And the value is no longer selected in the select list. It is cleared.

Code to save:

    post.save().then(
            function () {
              alert("Save OK");
            }
    )

Any idea in which direction I need to search ... If I transition to another page and then go back to the edit screen, the values are all correct. The data is thus still correct in the model ...

Amar Palsapure Amar Palsapure · Accepted Answer · 2013-09-11T10:58:39

Get the latest canary build, this will fix the belongsTo issue, but for hasMany I tried modifying the code of ember-data, and it worked so far,

Changed the line no 167 to

if (relationshipType === 'manyToNone' 
 || relationshipType === 'manyToMany' 
 || relationshipType === 'manyToOne')

Update

Better solution is override serializeHasMany method in your serializer.

Thanks to @wycats (as per discussion on github #1273)

Something like

Deific.AppacitiveRESTSerializer = DS.RESTSerializer.extend({
    //primary key is '__id' in appacitive, overriding default behaviour
    primaryKey: '__id',

    serializeHasMany: function(record, json, relationship) {
        var key = relationship.key;

        var relationshipType = DS.RelationshipChange.determineRelationshipType(record.constructor, relationship);

        if (relationshipType === 'manyToNone' || relationshipType === 'manyToMany' || relationshipType === 'manyToOne') {
            json[key] = record.get(key).mapBy('id');
        // TODO support for polymorphic manyToNone and manyToMany relationships
        }
    }
});

Deific.Store = DS.Store.extend({
    revision: 12,
    adapter: DS.RESTAdapter.extend({
        namespace: 'service',
        defaultSerializer: 'Deific/appacitiveREST'
    }),
});

For time being this can be used. Hope this helps.

Ember data: save loses belongsTo relationship

3 Answers