I have a service which imports Http, and when I use it in my app it throws error. "No provider for Http! Error at g injectionError". I am lazyloading the app. Also the provider was generated through cli "ionic g provider ..."
complaint-service.ts
import { Injectable } from '@angular/core';
import { Http } from '@angular/http';
import 'rxjs/add/operator/map';
@Injectable()
export class ComplaintService {
private complaints: {subject: string, description: string}[] = [];
constructor(public http: Http) {
this.http = http;
this.complaints = null;
console.log('Hello ComplaintService Provider');
}
addComplaints(complaint: {subject: string, description: string}) {
this.complaints.push(complaint);
}
getComplaints() {
return this.complaints.slice();
}
}
complaint-form.ts
import { Component } from '@angular/core';
import {Validators, FormBuilder, FormGroup } from '@angular/forms';
import { IonicPage, NavController, NavParams } from 'ionic-angular';
import {ComplaintService} from '../../providers/complaint-service';
@IonicPage()
@Component({
selector: 'page-complaint-form',
templateUrl: 'complaint-form.html',
providers: [ComplaintService]
})
export class ComplaintForm {
}
Any suggestions?
You have to register the HttpModule to your module (/app.module.ts):
import { HttpModule} from '@angular/http';
@NgModule({
imports: [
HttpModule
],
declarations: [ AppComponent ],
bootstrap: [ AppComponent ]
})
export class AppModule {
}
Add HTTP to the providers list as well. (to AppModule)
import { HTTP } from '@ionic-native/http';
And
providers: [
...,
HTTP
]
Working with Angulat5+, Ionic 3+
HttpModule is deprecated in the latest version of ionic3 and Angular5. So, you have to use HttpClientModule instead of HttpModule. Other things will be same as @devqon's answer. After that, you can use HttpClient in your service or component file.
For more info, please refer to the original document of Angular.
import {HttpClientModule} from "@angular/common/http";
@NgModule({
imports: [
HttpClientModule
],
declarations: [ AppComponent ],
bootstrap: [ AppComponent ]
})
export class AppModule {
}