Jquery Deferred object issue when chaining .then

Question

I'm having an issue with my returned data for the chained then being the 1st deferred data. The first example works:

api.getData().done(function(data){
  api.getData2().done(
    function(data2){
      $.log('success', data2);
    });
  });

But the second example SHOULD work, having data2 for the second .then(), but for some reason its the same as data1.

api.getData().then(function(data1){
  return api.getData2();
}).then(
function(data2){
  $.log('success', data2);
});

Any suggestions?

Can you post the code for api.getData2? If I remember correctly, api.getData2 has to return a promise object for this to work correctly, and it also has to resolve the deferred object at some point. I've had this problem before myself. — user677526
– user677526, Commented Nov 20, 2012 at 16:48

adeneo · Accepted Answer · 2012-11-20 16:47:37Z

1

$.when will accept two asynchronous functions that returns a promise and execute the .then() function when both are done :

$.when( api.getData(), api.getData2() ).done(function(data, data2) {
    $.log('success', data2);
});

If for some reason (like needing the data) you need to perform getData() before getData2(), there really is no need for .then(), as your first example seems valid enough for that?

answered Nov 20, 2012 at 16:47

adeneo

319k29 gold badges410 silver badges392 bronze badges

Sign up to request clarification or add additional context in comments.

Comments

Lucas · Accepted Answer · 2012-11-20 17:04:15Z

1

So After some research JQuery Deferred.Pipe I found out I can't chain .then, but instead need to use pipe like below (.pipe() is chainable):

api.getData().pipe(function(data1){
  return api.getData2();
}).then(
function(data2){
  $.log('success', data2);
});

answered Nov 20, 2012 at 17:04

Lucas

3,4814 gold badges30 silver badges35 bronze badges

1 Comment

Lucas Over a year ago

additionally you can finish your chain with a .then (equivalent to both .done and .fail)

Collectives™ on Stack Overflow

Jquery Deferred object issue when chaining .then

2 Answers 2

Comments

1 Comment

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

Comments

1 Comment

Your Answer

Sign up or log in

Post as a guest

Related