Develop Reference

AngularJS Initialize provider data

I have code:
angular.module('admin', [])
.provider('users', function () {
this.users = 'default';
this.$get = function () {
var that = this;
return {
getUsers: function () {
return that.users;
}
}
};
})
.run(function (users, $http) {
users.users = $http('url'); // and others
})
.controller('test', function ($scope, users) {
$scope.users = users.getUsers();
});
I would like to intitalize data in .run() method (I can't use .config() method because it doesn't let to pass any services like $http). I found .run() method, but this code doesn't work... Data aren't saved in provider. Official documentation says:
"Execute this function after injector creation. Useful for application initialization."
I think it's best way to initialize data.

You may want to use an Angular Factory/Service for this kind of need. That is what I do. And pass that into the application. That service will be your singleton or source of truth about the dat.
angular.module('myData.services', [])
.factory('myData', ['$rootScope', '$http' , function($rootScope,$http) {
var factory = {
myData : {}
};
$http('/api/call', function(apiData) {
factory.myData = apiData;
});
return factory;
}]);
You could then use this in your controllers:
angular.module('myApp.controllers', [])
.controller('myCtrl', ['myData', '$scope', function(myData, $scope){
$scope.users = myData;
}]);
Check out the documentation on services: https://docs.angularjs.org/guide/services

Second attempt
angular.module('admin', [])
.factory('users', function ($http) {
var users = {};
var data = [];
$http.get('database.php')
.then(function (response) {
data = response.data;
});
users.getData = function () {
return data;
};
return users;
})
.controller('test', function ($scope, users) {
console.log(users.getData());
});
I would like to have data private. Empty Array returned, reponse comes with all data.

Provider configuration can be doable inside config block only, you can't do that inside run block
Though I don't find a reason to load users object while configuring app. I'd say that you should use either service/factory for this.
Code
angular.module('admin', [])
.service('users', function($http, $q) {
var users = [];
//make an get call to fetch users
function getUsers() {
return $http.get('database.php')
.then(function(response) {
data = response.data;
});
}
//will make a call if users aren't there
this.getData = function() {
// Handled below two conditions
// 1. If users aren't fetched the do an Ajax
// 2. If last ajax doesn't return a data then DO it again..
if (users.length > 0)
return $q.resolve(data); //do return data using dummy promise
return getUsers();
};
return users;
})
.controller('test', function($scope, users) {
users.getData().then(function(data){
console.log(data);
});
});

How to use a service with Http request in Angular JS

I'm using AngularJS to build my web application, I've been always using controllers to make HTTP request, which makes things easier and clear for me.
But for a better code structure, and better execution for my application, I wanted to use services instead of controllers to use the web service.
I tried to make :
var app = angular.module('ofcservices', []);
app.factory('news', ['$http', function ($http) {
var news={};
news.getnews= function () {
return $http.get('http://int.footballclub.orange.com/ofc/news?offset=0&limit=5');
};
return news;
}]);
and the code of the controller :
.controller('news', function($scope, ofcservices) {
$scope.news = ofcservices.getnews();
})
Everything seems to be right ?

ofcservices.getnews() is a promise You need manage with the function sucess and error
ofcservices.getnews().
success(function(data) {
$scope.news=data
}).
error(function(data, status, headers, config) {
//show a error
});
As weel change app.factory('news' to app.factory('newsFactory' and call it in controller('news', function($scope, newsFactory) {
You can get more data about promise in the angular documentation

The concept is more or less right, but you should use the callback functions to handle the $http response correctly.
But your controller and service have the same name news, which is BAD :-) and you need to inject the newsService and not the module name.
.controller('newsController', function($scope, newsService) {
newsService.getnews().then(
function(newsData) {
$scope.newsData = newsData
},
function optionalErrorhandler() {});
})

angular
.module('MyApp', [])
.controller('MyController', MyController)
.factory('MyService', MyService);
MyController.$inject = ['$scope','MyService'];
MyService.$inject = ['$http'];
function MyService($http){
var service = {
var myServiceFunction : function(){
$http({
// your http request on success return the data.
}).success(function(data)){
return data;
});
}
};
return service;
}
function MyController($scope, MyService){
MyService.myServiceFunction(); //Call service from the controller.
}

AngularJS App: Load data from JSON once and use it in several controllers

I'm working on a mobile app using AngularJS as a framework, currently I have a structure similar to this:
app.config(['$routeProvider', function($routeProvider) {
$routeProvider
.when('/', {
templateUrl : 'pages/home.html',
controller : 'homeCtrl'
})
.when('/one', {
templateUrl : 'pages/one.html',
controller : 'oneCtrl'
})
.when('/two', {
templateUrl : 'pages/two.html',
controller : 'twoCtrl'
});
}]);
app.controller('homeCtrl', ['$scope', function($scope) {
}]);
app.controller('oneCtrl', ['$scope', function($scope) {
}]);
app.controller('twoCtrl', ['$scope', function($scope) {
}]);
And then I'm displaying the content with an ng-view:
<div class="ng-view></div>
Things are working well but I need to load data from a JSON file to populate all the content of the app. What I want is to make and an AJAX call only once and then pass the data through all my different controllers. In my first attempt, I thought to create a Service with an $http.get() inside of it and include that in every controller, but it does not work because it makes a different ajax request everytime I inject and use the service. Since I'm new using angular I'm wondering what is the best way or the more "angular way" to achieve this without messing it up.
Edit: I'm adding the code of the service, which is just a simple $http.get request:
app.service('Data', ['$http', function($http) {
this.get = function() {
$http.get('data.json')
.success(function(result) {
return result;
})
}
});

Initialize the promise once, and return a reference to it:
No need to initialize another promise. $http returns one.
Just tack a .then() call on your promise to modify the result
angular.module('app', [])
.service('service', function($http){
this.promise = null;
function makeRequest() {
return $http.get('http://jsonplaceholder.typicode.com/posts/1')
.then(function(resp){
return resp.data;
});
}
this.getPromise = function(update){
if (update || !this.promise) {
this.promise = makeRequest();
}
return this.promise;
}
})
Codepen example
Edit: you may consider using $http cache instead. It can achieve the same results. From the docs:
If multiple identical requests are made using the same cache, which is not yet populated, one request will be made to the server and remaining requests will return the same response.

Try this to get JSON Data from a GET Link:
(function (app) {
'use strict';
app.factory('myService', MyService);
MyService.$inject = ['$q', '$http'];
function MyService($q, $http) {
var data;
var service = {
getData: getData
};
return service;
//////////////////////////////////////
function getData(refresh) {
if (refresh || !data) {
return $http.get('your_source').then(function(data){
this.data = data;
return data;
})
}
else {
var deferrer = $q.defer();
deferrer.resolve(data);
return deferrer.promise;
}
}
}
}(angular.module('app')));
Now you can add this dependency in your controller file and use:
myService.getData().then(function(data){
//use data here
}, function(err){
//Handle error here
});

Angularjs cacheFactory : id is already taken

I am using the $cacheFactory to store a language JSON file for the app, and i run a factory method every new route like this:
index.js
$routeProvider
.when('/',{
'templateUrl':'views/home/index.html',
'controller':'Home',
'resolve': {
'onEnter': function ($rootScope, langFactory) {
return langFactory.getLangFile($rootScope.lang.appLang);
}
}
})
.when('/auth/login',{
'templateUrl':'views/auth/login.html',
'controller':'AuthLogin',
'resolve': {
'onEnter': function ($rootScope, langFactory) {
return langFactory.getLangFile($rootScope.lang.appLang);
}
}
})
factories.js
.factory('langFactory', ['$rootScope', '$window', '$http', '$cacheFactory', '$q', function ($rootScope, $window, $http, $cacheFactory, $q) {
var getLangFile = function (langCode) {
var deferred = $q.defer()
, cache = $cacheFactory('langCache');
if (!!!cache.get('cache' + $rootScope.lang.appLang)) {
$http.get(langCode + '-langFile-to-be-REMOVED.json').success(function (response) {
cache.put('cache' + $rootScope.lang.appLang, response);
deferred.resolve();
}).error(function (err) {
$window.console.error('Unable to retrieve app language: ' + err);
deferred.reject(err);
});
} else {
deferred.resolve();
}
return deferred.promise;
};
return {
'getLangFile':getLangFile
};
}])
On first page load it works , then if i browse, without refreshing, to auth/login i get a console error:
[$cacheFactory:iid] CacheId 'langCache' is already taken!
Seems like (since i call the factory method on every route) it cant use the same id !?
I actually dont know what to do to fix this, any help appriciated, thanks.

This is what worked for me:
cache = $cacheFactory.get('langCache') || $cacheFactory('langCache');

Ok thanks to a guy on IRC i fixed this problem, i just had to change this:
var getLangFile = function (langCode) {
var deferred = $q.defer()
, cache = $cacheFactory('langCache');
to
var cache = $cacheFactory('langCache')
, getLangFile = function (langCode) {
var deferred = $q.defer();

AngularJS service only running the first time controller is used

I have the following controller that uses a service Customers to return customers. The problem is that its only executing the service the first time the controller is run. Looking at my server I see its only performing the get request the FIRST time the controller used(loading that view) if I change views and say add a customer and come back to the view that list customers its not updated because there was not another get request from the service.
.controller('searchCTRL', ['$scope', '$http', 'Customers', function($scope, $http, Customers) {
$scope.customers = Customers;
$scope.deleteCustomer = function(id) {
$http.delete('/api/customer/' + id)
.success(function(data) {
$scope.customers.data = data;
})
.error(function(data) {
console.log('Error: ' + data);
});
};
}])
and
.factory('Customers', function($http){
var Customers = {};
$http.get('/api/customer')
.success(function(data) {
Customers.data = data;
})
.error(function(data){
console.log('error: ' + data);
});
return Customers;
});
if I stay on the view and reload the page it gets the data like it should but any subsequent visits to the page no longer execute the get. Any help would be appreciated.

Angular .factory is a singleton so it will always only run once. Also, the $http call is async so you should be using promise in order to get the data to your controller. Try the following:
.factory('Customers', function($http, $q){
return function () {
var d = $q.defer();
$http.get('/api/customer')
.success(function(data) {
d.resolve(data);
})
.error(function(data){
console.log('error: ' + data);
d.reject(data);
});
return d.promise;
};
});
and in your controller:
.controller('searchCTRL', ['$scope', '$http', 'Customers', function($scope, $http, Customers) {
Customers().then(function (data) {
$scope.customers = data;
});
...
As $http returns a promise, you can further simply your .factory by doing:
.factory('Customers', function($http){
return function () {
return $http.get('/api/customer');
};
})
For more detail, see documentation for $http.