AngularJS wait for $http response

Question

I need to wait until I have a response from the $http get request. Here is my code:

var app = angular.module('prova', ['ui.bootstrap']);

app.controller('MainCtrl', function($scope, $http) {

$scope.currentPage = 1;
$scope.itemsPerPage = 5;
$scope.maxSize = 5;
$scope.tickets = [];

$http({method: 'GET', url: 'getNews.json'}).
success(function(data, status, headers, config) {

    $scope.tickets = data;
}).
error(function(data, status, headers, config) {
    // called asynchronously if an error occurs
    // or server returns response with an error status.
});

for (var i = 0; i < 78; i++) {
    $scope.tickets.push('ticket ' + i);
}
$scope.noOfPages = $scope.tickets.length / $scope.itemsPerPage;

$scope.$watch('currentPage', function() {
    var begin = ($scope.currentPage - 1) * $scope.itemsPerPage;
    var end = begin + $scope.itemsPerPage;

    $scope.paged = {
        tickets: $scope.tickets.slice(begin, end)
    }
   });
});

View:

<!DOCTYPE html>
<html ng-app="plunker">

<head>
    <meta charset="utf-8" />
    <title>AngularJS Plunker</title>
    <link data-require="[email protected]" data-semver="3.0.3" rel="stylesheet" href="http://netdna.bootstrapcdn.com/bootstrap/3.0.3/css/bootstrap.min.css" />
    <script data-require="angular.js@*" data-semver="1.2.12" src="http://code.angularjs.org/1.2.12/angular.js"></script>
    <script data-require="[email protected]" src="http://angular-ui.github.io/bootstrap/ui-bootstrap-tpls-0.11.0.min.js"></script>
    <script data-require="jquery@*" data-semver="2.0.3" src="http://code.jquery.com/jquery-2.0.3.min.js"></script>
    <script data-require="[email protected]" data-semver="3.0.2" src="http://netdna.bootstrapcdn.com/bootstrap/3.0.2/js/bootstrap.min.js"></script>
    <script src="app.js"></script>
</head>

<body ng-controller="MainCtrl">

    <div>{{noOfPages}} &nbsp; {{currentPage}} &nbsp; {{maxSize}}
        <pagination ng-model="currentPage" total-items="tickets.length" items-per-page="5"></pagination>
    </div>
    <div class="alert alert-info" ng-repeat="tic in paged.tickets">
        {{tic}}
    </div>

</body>

</html>

Are you using ng-repeat in your view? If you are, it will automatically handle populate when $scope.tickets receives the data. To make your pagination work, use a filter instead. Then you don't need the additional watch. Check my answer here. — jme11
– jme11, Commented Jul 16, 2015 at 10:05
@jme11 thanks for the answer..I'll check it out, in the meantime I edited my question with my view.. — FabioEnne
– FabioEnne, Commented Jul 16, 2015 at 10:11
@jme11 anyway the problem is that in some way I have to whait for the response from the AJAX call.. — FabioEnne
– FabioEnne, Commented Jul 16, 2015 at 10:12
as @RoshanMathews said in his answer, just put the code that need to wait for the response in the .success function of you $http call. — Okazari
– Okazari, Commented Jul 16, 2015 at 10:15

Roshan Mathews · Accepted Answer · 2015-07-16 10:32:13Z

1

Angular's $http will return a promise, you can add your code to the success method. To reuse the example from the $http documentation:

// Simple GET request example :
$http.get('/someUrl').
  success(function(data, status, headers, config) {
    // this callback will be called asynchronously
    // when the response is available
  }).
  error(function(data, status, headers, config) {
    // called asynchronously if an error occurs
    // or server returns response with an error status.
  });

EDIT:

Looks like the following code:

for (var i = 0; i < 78; i++) {
    $scope.tickets.push('ticket ' + i);
}
$scope.noOfPages = $scope.tickets.length / $scope.itemsPerPage;

$scope.$watch('currentPage', function() {
    var begin = ($scope.currentPage - 1) * $scope.itemsPerPage;
    var end = begin + $scope.itemsPerPage;

    $scope.paged = {
        tickets: $scope.tickets.slice(begin, end)
    }
});

should be moved into the .success block. Hope that helps.

edited Jul 16, 2015 at 10:32

answered Jul 16, 2015 at 10:14

Roshan Mathews

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1 Comment

FabioEnne Over a year ago

it doesn't work..this code is the same as mine and it doesn't wait for a response..

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