angularjs auto reload when backend change

Problem

I need in my app to auto refresh when the back-end changes. I added a button to reload the GET to my back-end but I don't wish do that. This is my code

<body data-ng-app="myPr">
  <div ng-controller="TodosController">
    <div ng-repeat="todo in todos">
      <p>{{todo.title}} ...... {{todo.is_completed}}</p>
    </div>
    <button ng-click="reload()">Reload</button>
  </div>
</body>

my app.js

var myPr = angular.module('myPr',[]);

myPr.controller("TodosController", function ($scope,$http){

  $scope.reload = function () {
    $http.get('http://localhost:3000/api/todos').
        success(function (data) {
          $scope.todos = data.todos;
      });
  };
  $scope.reload();
});

Thanks

Problem courtesy of: user3486836

Solution

You could just reload your data at regular intervals. Otherwise you'd need to setup something like socket.io or Pusher and push notifications to the browser when the server updates.

var myPr = angular.module('myPr',[]);

myPr.controller("TodosController", function ($scope,$http,$timeout){

  $scope.reload = function () {
    $http.get('http://localhost:3000/api/todos').
        success(function (data) {
          $scope.todos = data.todos;
      });

    $timeout(function(){
      $scope.reload();
    },30000)
  };
  $scope.reload();
});
Solution courtesy of: David Boskovic

Discussion

You can use $interval(fuctionToRepeat, intervalInMillisecond) as documented here.

var myPr = angular.module('myPr',[]);

myPr.controller("TodosController", function ($scope,$http){

    $scope.reload = function () {
        $http.get('http://localhost:3000/api/todos').
            success(function (data) {
                $scope.todos = data.todos;
            });
    };
    $scope.reload();
    $interval($scope.reload, 5000);
});

Note: Intervals created by this service must be explicitly destroyed when you are finished with them. In particular they are not automatically destroyed when a controller's scope or a directive's element are destroyed. You should take this into consideration and make sure to always cancel the interval at the appropriate moment.

Discussion courtesy of: Kelvin Lai

This recipe can be found in it's original form on Stack Over Flow.