ember.js – 如何克隆Ember数据记录,包括关系？

Ds.Model.reopen({
    clone: function(overrides) {
        var model = this,attrs = model.toJSON(),class_type = model.constructor;

        var root = Ember.String.decamelize(class_type.toString().split('.')[1]);

        /*
         * Need to replace the belongsTo association ( id ) with the
         * actual model instance.
         *
         * For example if belongsTo association is project,the
         * json value for project will be:  ( project: "project_id_1" )
         * and this needs to be converted to ( project: [projecTinstance] )
         */
        this.eachRelationship(function(key,relationship) {
            if (relationship.kind == 'belongsTo') {
                attrs[key] = model.get(key);
            }
        });

        /*
         * Need to dissociate the new record from the old.
         */
        delete attrs.id;

        /*
         * Apply overrides if provided.
         */
        if (Ember.typeOf(overrides) === 'object') {
            Ember.setProperties(attrs,overrides);
        }

        return this.store.createRecord(root,attrs);
    }
});