Can't save object with hasMany property using FixtureAdapter

Question

I am unable to save parent records in a hasMany/belongsTo relationship. When I save the record, it forgets who its children are.

The objects are defined like so:

        // We're using ember-data...
        MF.Store = DS.Store.extend({
            adapter: DS.FixtureAdapter
        });

        // Two objects, a parent...
        MF.Parent = DS.Model.extend({
            name: DS.attr(),
            childs: DS.hasMany('child')
        });
        MF.Parent.FIXTURES = []; // ...with fixtures

        // ...and a child
        MF.Child = DS.Model.extend({
            name: DS.attr(),
            parent: DS.belongsTo('parent')
        });
        MF.Child.FIXTURES = [];

I have tried the following order of operations with the same end results in each.

Set Child's Parent. Save the Child. Save the Parent
Set Child's Parent. Save the Parent.
Add Child to Parent. Save Parent.
Add Child to Parent. Save Child. Save Parent.

There's a live demo you can see here on GitHub.

I'm seeing the same issue; pretty much the same setup. I'm hoping this works when using the REST adapter, but at the moment, I am just changing the relationship and via set and this automatically updates my UI without calling save. — steakchaser

stuporglue stuporglue · Accepted Answer · 2014-02-27T18:11:22

Looks like this is a known bug: http://discuss.emberjs.com/t/ember-data-fixture-adapter-saving-record-loses-has-many-relationships/2821

Here's the fix they suggest. It appears to be working.

MF.jsonSerializer = DS.JSONSerializer.extend({
    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] = Ember.get(record, key).mapBy('id');
            // TODO support for polymorphic manyToNone and manyToMany
            // relationships
        }
    }
});

Then I just specify the serializer for the models I need it in:

MF.ParentSerializer = MF.jsonSerializer;
MF.Childerializer = MF.jsonSerializer;

Can't save object with hasMany property using FixtureAdapter

1 Answers