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I attempting to use an angular2 http request, but I am getting the following error: [Error] EXCEPTION: No provider for ConnectionBackend! (AppComponent -> Http -> ConnectionBackend)
I have setup a barebones app which has the same problem, and am at a loss to what is causing it.
Thanks in advance
app.component.ts
import {Component} from 'angular2/core';
import {Http, Headers} from 'angular2/http';
@Component({
selector: 'app',
template: `
<button (click)="getEmployee()">Get</button>
<p>{{employee.email}}</p>
`,
providers: [Http]
})
export class AppComponent {
employee: {"email": "bob"};
http: Http;
constructor(http:Http){
this.http = http;
}
getEmployee(){
this.http.get('localhost:8080/employee-rates?id=0')
.map(response => response.json()).subscribe(result => this.employee = result);
}
}
main.ts
import {AppComponent} from './app.component';
import {bootstrap} from 'angular2/platform/browser';
import {HTTP_PROVIDERS, HTTP_BINDINGS} from 'angular2/http';
bootstrap(AppComponent, [
HTTP_PROVIDERS, HTTP_BINDINGS
]);
index.html
<html>
<head>
<base href="/">
<title>Test</title>
<meta name="viewport" content="width=device-width, initial-scale=1">
<script src="js/es6-shim/es6-shim.min.js"></script>
<script src="js/systemjs/dist/system-polyfills.js"></script>
<script src="js/angular2/bundles/angular2-polyfills.js"></script>
<script src="js/systemjs/dist/system.src.js"></script>
<script src="js/rxjs/bundles/Rx.js"></script>
<script src="js/angular2/bundles/angular2.dev.js"></script>
<script src="js/angular2/bundles/http.dev.js"></script>
<!-- 2. Configure SystemJS -->
<script>
System.config({
packages: {
app: {
format: 'register',
defaultExtension: 'js'
}
}
});
System.import('app/main')
.then(null, console.error.bind(console));
</script>
</head>
<!-- 3. Display the application -->
<body>
<div class='small-12'>
<app>Loading...</app>
</div>
</body>
</html>
747
From Angular 2 RC5 version, in your NgModule file, add:
import { HttpModule } from '@angular/http';
@NgModule({
imports: [
...
HttpModule ]
Remove HTTP_BINDINGS from your code. They are deprecated and reference HTTP_PROVIDERS, so it's like you're using providers twice.
bootstrap(AppComponent, [HTTP_PROVIDERS]);
Also you don't need providers: [Http] in your component, since you injected HTTP_PROVIDERS in bootstrap. Adding it to the component's providers will create new instance of the service.
@Component({
providers: []
})
src/main.ts
import { HTTP_PROVIDERS, ConnectionBackend } from '@angular/http';
bootstrap(AppComponent, [
HTTP_PROVIDERS,
ConnectionBackend
]);
Using [email protected] and [email protected]
2
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