I'm trying to make a single $http
request to get one of my JSON files and use the data across all my controllers.
I saw on egghead.io how to share data across multiple controllers, and I've also read this StackOverflow question: "Sharing a variable between controllers in angular.js".
However, the answers there don't use the $http
module. When using $http
, the controllers don't have the data to work on, and by the time the response is received it's already too late.
I then found the method $q.defer
and this question on StackOverflow: "AngularJS share asynchronous service data between controllers"
The solution posted there works fine, BUT it has two issues:
$http
request to obtain the same data already used in another controller; and,then
function.Below you can see my code:
controllers.js
'use strict';
/* Controllers */
function appInstallerListCtrl($scope, Data) {
$scope.apps = Data;
}
function appInstallerDetailCtrl($scope, $routeParams, Data) {
$scope.appId = $routeParams.appId;
$scope.apps = Data;
console.log($scope.apps); // <-- then function
console.log(Data); // <-- then function with $vv data returned but I can't access it
for (var i in $scope.apps) // <--- no way, baby!
console.log(i);
}
app.js
var app = angular.module('appInstaller', []);
app.factory('Data', function($http, $q) {
var defer = $q.defer();
$http.get('apps.json').then(function(result) {
defer.resolve(result.data.versions.version);
});
return defer.promise;
});
app.config(['$routeProvider', function($routeProvider) {
$routeProvider.
when('/app', {templateUrl: 'partials/app-list.html', controller: appInstallerListCtrl}).
when('/app/:appId', {templateUrl: 'partials/app-detail.html', controller: appInstallerDetailCtrl}).
otherwise({redirectTo: '/app'});
}]);
What I'd like to have is that when launching the app, the $http
request will be performed and the response will be used throughout the app across all controllers.
Thanks
Since you are using a promise, to access the data returned by promise use the callback syntax
function appInstallerDetailCtrl($scope, $routeParams, Data) {
$scope.appId = $routeParams.appId;
Data.then(function(returnedData) {
$scope.apps=returnedData;
console.log($scope.apps);
for (var i in $scope.apps)
console.log(i)
});
}
Make sure this
defer.resolve(result.data.versions.version);
resolve returns array, for the above code to work. Or else see what is there in data and ajust the controller code.