Troubleshooting AngularJS $q Promise Not Being Returned

I have encountered an issue while trying to call a service method in AngularJS. The service method is being called successfully, but it is not returning any value to the controller function that invoked it.

If anyone can offer assistance, I would greatly appreciate it. Below is my code:

  logosStreams.factory("processPaypal", ['$http', '$timeout', '$q',   '$state',function($http, $timeout, $q, $state){
  var transCall = {};
  var transcallPromise2 = $q.defer();   

  return {

    onSuccesfulPayment: function(payment) {
      console.log("payment success: " + JSON.stringify(payment, null, 4));
 transcallPromise2.resolve(payment);
    },
    onAuthorizationCallback: function(authorization) {
      console.log("authorization: " + JSON.stringify(authorization, null, 4));
      //return authorization;
    },
    createPayment: function(data) {
      // for simplicity use predefined amount
      var paymentDetails = new PayPalPaymentDetails("0", "0", "0");
      var payment = new PayPalPayment(data.amt, "USD", data.name, "Sale",
        paymentDetails);
      return payment;
    },

    buyInFutureBtn : function(e) {
        // future payment
        PayPalMobile.renderFuturePaymentUI(this.onAuthorizationCallback, this.onUserCanceled);
    },

    profileSharingBtn : function(e) {
        // profile sharing
        PayPalMobile.renderProfileSharingUI(["profile", "email", "phone","address", "futurepayments", "paypalattributes"],
         this.onAuthorizationCallback, this.onUserCanceled);
    },

    buyNowBtn : function(data) {

        // single payment
        PayPalMobile.renderSinglePaymentUI(this.createPayment(data), this.onSuccesfulPayment, this.onUserCanceled);
        return transcallPromise2.promise;

    },

    onPrepareRender: function() {

    },

    onUserCanceled: function(result) {
      console.log(result);
              transcallPromise2.reject(result);

    }

}

}])

To invoke the `buyNowBtn` method within the controller:

  processPaypal.buyNowBtn($scope.MMParams).then(function(response){
            console.log(response);
  })

Answer №1

There could be a reason why the value is not being returned, possibly due to your promise not being resolved. Make sure to call onSuccessfulPayment() in order for the promise to be resolved. It would be helpful if you could share the code snippet where onSuccessfulPayment() function is triggered.

Answer №2

Upon executing the buyNow function, you have successfully returned the promise object. Consider including the promise as a component of the overall returned object that includes all function connections.

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