DS.RESTSerializer#serializeIntoHash()

You can use this method to customize the root keys serialized into the JSON. The hash property should be modified by reference (possibly using something like _.extend) By default the REST Serializer sends the modelName of a model, which is a camelized version of the name.

For example, your server may expect underscored root objects.

import DS from 'ember-data';

export default DS.RESTSerializer.extend({
  serializeIntoHash: function(data, type, record, options) {
    var root = Ember.String.decamelize(type.modelName);
    data[root] = this.serialize(record, options);
  }
});