I'm having problems accessing Angular built-in services such as $http when creating a service with ES6.
For example, I'm creating a "ResultsFinder" service that will do an AJAX call and then do some stuff. The problem is that I only have access to $http on the constructor (if I pass it as an argument), but not on other methods (such as getResults).
See this code example:
Inside getResults I don't have access to $http. In order to have access I should do something that I don't feel right like this:
(() => {
'use strict';
class ResultsFinder {
constructor($http) {
this.$http = $http;
}
getResults() {
// Here I have access to this.$http
return 'ResultsFinder';
}
}
/**
* @ngdoc service
* @name itemManager.service:ResultsFinder
*
* @description
*
*/
angular
.module('itemManager')
.service('ResultsFinder', ResultsFinder);
}());
Anyone can give me some advice about the proper way to handle this?
You need to use this.$http
inside your getResults
method.
(() => {
'use strict';
class ResultsFinder {
static $inject = ['$http'];
constructor($http) {
this.$http = $http;
}
getResults() {
return this.$http.get('/foo/bar/');
}
}
/**
* @ngdoc service
* @name itemManager.service:ResultsFinder
*
* @description
*
*/
angular
.module('itemManager')
.service('ResultsFinder', ResultsFinder);
}());
As a side note, I added a static $inject
"annotation" to your class. This is a best practice if you are not using something like ngAnnotate. It also makes it easier to change out implementations by only changing the $inject
values.
If you are a ES5 developer it may help to think about how this would look in ES5
ResultsFinder.$inject = ['$http'];
var ResultsFinder = function($http) {
this.$http = $http;
}
ResultsFinder.prototype.getResults = function() {
return this.$http.get('/foo/bar/');
}
NOTE
Since you are using ES6, should probably use ES6 modules to organize your code.
You define and export your angular-module within an ES6 module:
import {module} from 'angular';
export var itemManager = module('itemManager', []);
Then import the Angular module
import {itemManager} from '../itemManager';
class ResultsFinder {
static $inject = ['$http'];
constructor($http) {
this.$http = $http;
}
getResults() {
return this.$http.get('/foo/bar/');
}
}
itemManager.service('ResultFinder', ResultFinder);