antonyboom antonyboom - 1 month ago 14
TypeScript Question

Property 'http' does not exist on type 'Component', Angular 2

I'm new in angular2 and typescript and already spent a half day to figure out with ng2 forms. I have finished all my routes and builded all necessary form and currently trying to understand how to post in angular2 with typescript

This my error:


ERROR in [default]
simpleapp/src/app/clients/add-client/add-client.component.ts:52:16
Property 'http' does not exist on type 'AddClientComponent'.


And I cannot find where is this problem coming from. I've imported
angular/http
in my component, I have provided header and response as oficial tutorial says but still can see this problem. What am I missing and where is my problem? thanks in advance

This is my component:

import 'rxjs/add/operator/map';

import {Component} from '@angular/core';
import {Http, Response, RequestOptions, Headers} from '@angular/http';

import {Employee} from "./model/add-client.model";

@Component({
selector: 'app-add-client',
templateUrl: 'add-client.component.html',
styleUrls: ['add-client.component.css']
})

export class AddClientComponent {

departments: Array<any>;
firstName: '';
lastName: '';
id: null;
salary: null;
phone: null;
departmentId: null;

constructor(http: Http) {
http.get('api/departments')
.map((res: Response) => res.json())
.subscribe((departments: Array<any>) => this.departments = departments);
}

model = new Employee(
this.id,
this.firstName,
this.lastName,
this.salary,
this.departmentId,
this.phone
);

submitted = false;

addEmployee = 'api/employees'

handleError = 'Post Error';

onSubmit(model) {
this.submitted = true;

let body = JSON.stringify({ model });
let headers = new Headers({ 'Content-Type': 'application/json' });
let options = new RequestOptions({ headers: headers });

return this.http.post(this.addEmployee, body, options)
.catch(this.handleError);

}
}


This is my template:

<div class="container">
<md-card class="demo-card demo-basic">
<md-card-title color="primary back-header">Employee Form</md-card-title>
<md-card-content>
<form (ngSubmit)="onSubmit(model)" #employeeForm="ngForm">
<md-toolbar for="firstName">First Name</md-toolbar>
<md-input
class="demo-full-width input-text"
type="text"
id="firstName"
required
[(ngModel)]="model.firstName"
name="firstName"
#firstName="ngModel">
</md-input>

<md-toolbar for="lastName">Last Name</md-toolbar>
<md-input
class="demo-full-width input-text"
type="text"
id="lastName"
required
[(ngModel)]="model.lastName"
name="lastName"
#lastName="ngModel">
</md-input>

<md-toolbar for="salary">Salary</md-toolbar>
<md-input
class="demo-full-width input-text"
type="number"
id="salary"
placeholder="USD"
required
[(ngModel)]="model.salary"
name="salary"
#salary="ngModel">
</md-input>

<md-toolbar for="departmentId">Department</md-toolbar>
<select class="demo-full-width option-department input-text"
id="departmentId"
required
[(ngModel)]="model.departmentId"
name="departmentId"
#departmentId="ngModel">
<option
*ngFor="let department of departments"
[value]="department.id">{{department.name}}
</option>
</select>

<md-toolbar for="phone">Phone</md-toolbar>
<md-input
class="demo-full-width input-text"
type="number"
id="phone"
placeholder="phone #"
required
[(ngModel)]="model.phone"
name="phone"
#phone="ngModel">
</md-input>

<button md-raised-button color="primary"
type="submit"
class="btn btn-default"
[disabled]="!employeeForm.form.valid">Submit
</button>
</form>
</md-card-content>
</md-card>
<md-card [hidden]="!submitted">
<md-card-title>You submitted the following:</md-card-title>
<md-list>
<md-list-item>
<label>First Name:</label> {{model.firstName}}
</md-list-item>
<md-list-item>
<label>Last Name:</label> {{model.lastName}}
</md-list-item>
<md-list-item>
<label>Salary:</label> {{model.salary}}
</md-list-item>
<md-list-item>
<label>Department:</label> {{model.departmentId}}
</md-list-item>
<md-list-item>
<label>Phone:</label> {{model.phone}}
</md-list-item>
</md-list>
</md-card>
</div>


This is my module:

import { BrowserModule } from '@angular/platform-browser';
import { NgModule } from '@angular/core';
import { FormsModule } from '@angular/forms';
import { HttpModule } from '@angular/http';


import { MaterialModule } from '@angular/material';
import {MdListModule} from '@angular/material/list';


import { AppComponent } from './app.component';
import { routing, appRoutingProviders } from './app.routing';

//==============

import { ClientsComponent } from './clients/clients.component';
import { DepartmentsComponent } from './departments/departments.component';
import { AddClientComponent } from './clients/add-client/add-client.component';
import { AddDepartmentComponent } from './departments/add-department/add-department.component';

@NgModule({

imports: [
BrowserModule,
FormsModule,
HttpModule,
routing,

MaterialModule.forRoot(),
MdListModule.forRoot()
],

declarations: [
AppComponent,
ClientsComponent,
DepartmentsComponent,
AddClientComponent,
AddDepartmentComponent
],

providers: [appRoutingProviders],

bootstrap: [AppComponent]
})
export class AppModule { }

Answer

Just add private to make your Http instance available to your entire component:

constructor(private http: Http)
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