ngResourceCallback.js

/***
 * How to add a callback to AngularJS $resource.
 *
 * Promises enables to add success and failure callback 
 *  after the execution of $resource method. 
 */ 
var app = angular.module("application", ['ngResource']);

app.factory('$crud', function ($resource) {
    return $resource('url', {}, {
        update: { method: 'PUT' }
    })
});

// Call 
$crud.update($scope.data)
    .$promise
    .then
    (
       // Success
       function(data)
       {
         $scope.status = "Success";
       },
       // Error
       function( error )
       {
        $scope.status = "Error";
       }
    );