Restangular adapter to expand compound documents from jsonapi.org

config.js

// This variation just injects the extracted data right into the relationships and also stores things in
// ._meta and ._included instead of just .included

// it (like restangular) requires either lodash or underscorejs

.config(function(RestangularProvider) {
    // add a response interceptor
    RestangularProvider.addResponseInterceptor(function(data, operation, what, url, response, deferred) {
		var extractedData = data.data;

		function _apply(elem, fct) {
			if ( elem === undefined ) { return; }
			if ( elem.type !== undefined ) {
				fct(elem);
			} else {
				_.forEach(elem, function(el) {
					_apply(el, fct);
				});
			}
		}

		// TODO: restangularize all the included stuff (would have to be moved outside of provider to work)
		
		// replace relationships with included data
		_apply(data.data, function(elem) {
			_apply(elem.relationships, function(rel) {
				var include_obj = _.find(data.included, function(included) {
					return ( ( included.type == rel.type ) &&  ( included.id == rel.id ) );
				});
				if ( include_obj ) {
					_.merge(rel,include_obj);
				}
			});
		});
		// save a copy of included and metadata
		extractedData._meta = data.meta;
		extractedData._included = data.included;
		return extractedData;
    });
});

usage.js

//simply call the relationship object and bam!
seller.relationships.user.data.attributes.name

// Note that the relationships are not restangularized properly because it is in the provider above.