Angular.js factory: Handle $http asynchronously

February 20, 2015

The problem:

When I was using $http service to get data from a remote API, my code below was not able to return data back to the controller.

myApp.factory(‘myFactory’, function($http){ var data = { anArray:[] };

$http.get(‘/api’).success(function(data) { data.anArray.push(data); });

return data; });

This is because the return data is already executed before the $http get request finish pushing data into the array.

My solution:

In order to handle data asynchronously, the controller needs to tell the service what to do when the data is received later:

myApp.factory(‘myFactory’, function($http){ return { getData: function(){ return $http.get(‘/api’); } }; });

myApp.controller(‘MyController’, [‘$scope’, ‘myFactory’, function($scope, myFactory) { $scope.data = [];

var handleSuccess = function(data, status){ $scope.data = data; };

myFactory.getData().success(handleSuccess); }

Let me know if you have any questions ☺

Originally published at victorleungtw.com on December 27, 2014.


Written by Victor Leung who is a keen traveller to see every country in the world, passionate about cutting edge technologies. Follow me on Twitter