Trouble with asynchronous events in angular

The code I have loops through 10 items in an array, makes a request for each item, then pushes the returned data to an array. Everything runs fine until the $q.all line.

details.getDetails = function(idSet, pageNum) {
  var page = idSet[pageNum],
      mainDeferred = $q.defer(),
      promises = [],
      combinedItems = [];

  for(var i=0; i<page.length; i++){
    var deferred = $q.defer();
    ngGPlacesAPI.placeDetails({placeId: page[i][i]})
      .then(function(data){
        combinedItems.push(data);
        console.log(combinedItems); /// This shows the objects being pushed into the array
        deferred.resolve();
      });

    promises.push(deferred.promise);
  }

  console.log(promises); /// This shows the 10 promises

  $q.all(promises).then(function() { /// Nothing after this line runs
    console.log('test', mainDeferred.promise); /// This logs nothing
    mainDeferred.resolve(combinedItems);
  });
  return mainDeferred.promise;
};