angularjs - Breeze rejectChanges() doesn't return a promise? -

with following code:

function cancelchanges() {     if (datacontext.manager.haschanges()) {         return datacontext.manager.rejectchanges();     } else {         console.log("no changes save");     } } 

if call this:

         cancelchanges()                 .then(function () {                     console.log("changes cancelled");                 }) 

i "object has no method 'then'". if use savechanges, works. problem else statement not returning i'll error .then , .fail calls... how can fixed use promises?

you can create promise of own using $q service in angular.

 function cancelchanges() {     var deferred = $q.defer();     if (datacontext.manager.haschanges()) {         datacontext.manager.rejectchanges();         deferred.resolve("changes cancelled");     } else {         deferred.reject("no changes save");     }     return deferred.promise;  }      cancelchanges()             .then(function (result) {                 console.log(result);             })