Chain promises with AngularJS

Question

I have a service called paymentStrategy that get injected in my controller.

$scope.buy = function() {
  paymentStrategy.buy()
    .then(function(response) {
         


        

Answer 1

If you need to chain promises in Angular sequentially, you can simply return the promises from one to another:

callFirst()
.then(function(firstResult){
   return callSecond();
})
.then(function(secondResult){
   return callThird();
})
.then(function(thirdResult){
   //Finally do something with promise, or even return this
});

And if you want to return all of this as an API:

function myMethod(){
   //Return the promise of the entire chain
   return first()
           .then(function(){
               return second();
           }).promise;
}