Resolve a promise array with Angular UI Router

Question

I'm trying to resolve a promise array to things before hitting my controller:

resolve:{
  things: function($q){
    var promises = [];
    var titles = [];
    var thingRef = ['a1', 'a2', 'a3'];
    angular.forEach(thingRefs, function(thingRef){
      promises.push($firebase(ref.child('things').child(thingRef).child('title')).then(function(title){
        titles.push(title);
      }));
    });

    $q.all(promises).then(function(){
      return titles;
    });
  }
},

What am I doing wrong here?

Halcyon · Accepted Answer · 2014-05-09 20:01:52Z

3

I think you need:

return $q.all(promises).then(function(){
  return titles;
});

Because without that outer return the inner return doesn't go anywhere.

Now resolve.things returns a promise, that when resolved, will contain an Array of titles.

With some other adjustments:

resolve:{
  things: function($q){
    var promises = [];
    var thingRef = ['a1', 'a2', 'a3'];
    angular.forEach(thingRefs, function(thingRef){
      promises.push($firebase(ref.child('things').child(thingRef).child('title')));
    });

    return $q.all(promises);
  }
}

edited May 9, 2014 at 20:01

answered May 9, 2014 at 19:56

Halcyon

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3 Comments

Halcyon Over a year ago

I made some additional adjustments. If this doesn't work can you show me the output of the promise and the result of $firebase(ref.child('things').child(thingRef).child('title'))?

Dan Kanze Over a year ago

I was being completely retarded. I forgot to inject ref. Thanks for your help! --- btw you do need the return in front of $q.all()

Halcyon Over a year ago

Yes because $q.all produce a new promise that gets resolved when all the input promises are resolved. If you don't return anything you just get undefined.

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