angularjs auto reload when backend change

angularjs rest frontend backend

42,173

Solution 1

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 2

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.

42,173

Author by

user3486836

Updated on October 22, 2020

Comments

user3486836 over 3 years

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

SolessChong over 7 years

You should use $interval as in @Kelvin's answer. Timeout just execute once.
Aditya Parmar over 6 years

we can use $interval, But how to stop it?
Jared Chu over 5 years

it's actually working as an interval, to stop it you just need to use a flag to stop calling the timeout function.
Pavan Jadda over 5 years

I used $interval, it's pretty good. Make sure to include decent interval time to prevent too much load on backend