Javascript Angular 2/Angular 4-无法读取在newZoneAwarePromise上定义的authService的属性
我已经创建了authService,在其中我创建了一个功能,用于检查电子邮件是否已经注册。虽然employee validation我调用此函数禁止电子邮件,但它给出了一个错误:无法读取在newZoneAwarePromise中定义的authService的属性 这是我的密码:Javascript Angular 2/Angular 4-无法读取在newZoneAwarePromise上定义的authService的属性,javascript,angular,angular-promise,angular-observable,Javascript,Angular,Angular Promise,Angular Observable,我已经创建了authService,在其中我创建了一个功能,用于检查电子邮件是否已经注册。虽然employee validation我调用此函数禁止电子邮件,但它给出了一个错误:无法读取在newZoneAwarePromise中定义的authService的属性 这是我的密码: import { Component, OnInit } from '@angular/core'; import { NgForm, FormGroup, FormControl, Validators } from
import { Component, OnInit } from '@angular/core';
import { NgForm, FormGroup, FormControl, Validators } from '@angular/forms';
import { Observable } from 'rxjs/Observable';
import 'rxjs/add/operator/map';
import 'rxjs/add/operator/toPromise';
import 'rxjs/Rx';
import { AuthService } from '../auth/auth.service';
@Component({
selector: 'app-employee',
templateUrl: './employee.component.html',
styleUrls: ['./employee.component.css']
})
export class EmployeeComponent implements OnInit {
genders = ['male', 'female'];
departments = ['IT', 'Account', 'HR', 'Sales'];
employeeForm: FormGroup;
employerData = {};
constructor(private authService: AuthService) { }
ngOnInit() {
this.employeeForm = new FormGroup({
'name': new FormControl(null, [Validators.required]),
'email': new FormControl(
null,
[Validators.required, Validators.email],
this.forbiddenEmails
),
'password': new FormControl(null, [Validators.required]),
'gender': new FormControl('male'),
'department': new FormControl(null, [Validators.required])
});
}
registerEmployee(form: NgForm) {
console.log(form);
this.employerData = {
name: form.value.name,
email: form.value.email,
password: form.value.password,
gender: form.value.gender,
department: form.value.department
};
this.authService
.registerEmployee(this.employerData)
.then(
result => {
console.log(result);
if (result.employee_registered === true) {
console.log('successful');
this.employeeForm.reset();
// this.router.navigate(['/employee_listing']);
}else {
console.log('failed');
}
}
)
.catch(error => console.log(error));
}
forbiddenEmails(control: FormControl): Promise<any> | Observable<any> {
const promise = new Promise<any>((resolve, reject) => {
this.authService
.employeeAlreadyRegistered(control.value)
.then(
result => {
console.log(result);
if (result.email_registered === true) {
resolve(null);
}else {
resolve({'emailIsForbidden': true});
}
}
)
.catch(error => console.log(error));
/*setTimeout(() => {
if (control.value === 'test@test.com') {
resolve({'emailIsForbidden': true});
} else {
resolve(null);
}
}, 1500);*/
});
return promise;
}
}
从'@angular/core'导入{Component,OnInit};
从'@angular/forms'导入{NgForm,FormGroup,FormControl,Validators};
从“rxjs/Observable”导入{Observable};
导入'rxjs/add/operator/map';
导入“rxjs/add/operator/toPromise”;
进口“rxjs/Rx”;
从“../auth/auth.service”导入{AuthService};
@组成部分({
选择器:“应用程序员工”,
templateUrl:“./employee.component.html”,
样式URL:['./employee.component.css']
})
导出类EmployeeComponent实现OnInit{
性别=[‘男性’、‘女性’];
部门=[“IT”、“会计”、“人力资源”、“销售”];
员工形式:FormGroup;
employerData={};
构造函数(私有authService:authService){}
恩戈尼尼特(){
this.employeeForm=新表单组({
“名称”:新FormControl(null,[Validators.required]),
“电子邮件”:新表单控件(
无效的
[Validators.required,Validators.email],
这是禁止的电子邮件
),
“密码”:新FormControl(null,[Validators.required]),
“性别”:新FormControl(“男性”),
“部门”:新FormControl(null,[Validators.required])
});
}
注册雇员(表格:NgForm){
控制台日志(表格);
this.employerData={
名称:form.value.name,
电子邮件:form.value.email,
密码:form.value.password,
性别:形式、价值、性别,
部门:form.value.department
};
这是authService
.registerEmployee(此.employerData)
.那么(
结果=>{
控制台日志(结果);
if(result.employee_registed===true){
console.log('successful');
这个.employeeForm.reset();
//this.router.navigate(['/employee_listing']);
}否则{
console.log('failed');
}
}
)
.catch(错误=>console.log(错误));
}
禁止电子邮件(控制:FormControl):承诺|可观察{
持续承诺=新承诺((解决、拒绝)=>{
这是authService
.EmployeeReadyRegistered(control.value)
.那么(
结果=>{
控制台日志(结果);
如果(result.email_registed===true){
解析(空);
}否则{
解析({'emailIsForbidden':true});
}
}
)
.catch(错误=>console.log(错误));
/*设置超时(()=>{
如果(control.value==='test@test.com') {
解析({'emailIsForbidden':true});
}否则{
解析(空);
}
}, 1500);*/
});
回报承诺;
}
}
授权服务代码:
import { Injectable } from '@angular/core';
import { Http, Response } from '@angular/http';
import { Headers, RequestOptions } from '@angular/http';
import 'rxjs/add/operator/map';
import 'rxjs/add/operator/toPromise';
import 'rxjs/Rx';
@Injectable()
export class AuthService {
url = 'http://mnc.localhost.com/api/user/';
response: object;
constructor(private http: Http) {}
signInUser(email: string, password: string): Promise<any> {
console.log('1111');
let headers = new Headers({ 'Content-Type': 'application/json' });
let options = new RequestOptions({ headers: headers });
return this.http
.post(this.url + 'signIn', { email: email, password: password }, options)
.toPromise()
.then(this.extractData)
.catch(this.handleError);
}
registerEmployee(employeeData: object): Promise<any> {
let headers = new Headers({ 'Content-Type': 'application/json' });
let options = new RequestOptions({ headers: headers });
return this.http
.post(this.url + 'registerEmployee', employeeData, options)
.toPromise()
.then(this.extractData)
.catch(this.handleError);
}
employeeAlreadyRegistered(email: string): Promise<any> {
let headers = new Headers({ 'Content-Type': 'application/json' });
let options = new RequestOptions({ headers: headers });
return this.http
.post(this.url + 'employeeAlreadyRegistered', { email: email }, options)
.toPromise()
.then(this.extractData)
.catch(this.handleError);
}
private extractData(res: Response) {
let body = res.json();
return body || {};
}
private handleError(error: any): Promise<any> {
console.error('An error occurred', error); // for demo purposes only
return Promise.reject(error.message || error);
}
}
从'@angular/core'导入{Injectable};
从'@angular/Http'导入{Http,Response};
从'@angular/http'导入{Headers,RequestOptions};
导入'rxjs/add/operator/map';
导入“rxjs/add/operator/toPromise”;
进口“rxjs/Rx”;
@可注射()
导出类身份验证服务{
url='1〕http://mnc.localhost.com/api/user/';
答复:对象;
构造函数(私有http:http){}
签名用户(电子邮件:string,密码:string):承诺{
控制台日志('1111');
let headers=新的头({'Content-Type':'application/json'});
let options=newrequestoptions({headers:headers});
返回此文件。http
.post(this.url+'signIn',{email:email,password:password},选项)
.toPromise()
.然后(此.extractData)
.接住(这个.把手错误);
}
registerEmployee(employeeData:object):承诺{
let headers=新的头({'Content-Type':'application/json'});
let options=newrequestoptions({headers:headers});
返回此文件。http
.post(this.url+'registereemployee',employeeData,选项)
.toPromise()
.然后(此.extractData)
.接住(这个.把手错误);
}
EmployeeReadyRegistered(电子邮件:string):承诺{
let headers=新的头({'Content-Type':'application/json'});
let options=newrequestoptions({headers:headers});
返回此文件。http
.post(this.url+'employeeAlreadyRegistered',{email:email},选项)
.toPromise()
.然后(此.extractData)
.接住(这个.把手错误);
}
私有数据(res:Response){
让body=res.json();
返回体| |{};
}
私有句柄错误(错误:任意):承诺{
console.error('发生错误',error);//仅用于演示目的
返回承诺。拒绝(error.message | | error);
}
}
registerEmployee函数也使用authservice,但在我添加此验证之前,它运行良好,这意味着禁止电子邮件函数中存在一些问题
我是angular js新手,无法解决此问题。在您的ngOnInit()
中更改您声明电子邮件自定义验证程序的方式:
ngOnInit() {
this.employeeForm = new FormGroup({
'name': new FormControl(null, [Validators.required]),
'email': new FormControl(
null,
[Validators.required, Validators.email],
(control: FormControl) => {
// validation email goes here
// return this.forbiddenEmails(control);
}
),
'password': new FormControl(null, [Validators.required]),
'gender': new FormControl('male'),
'department': new FormControl(null, [Validators.required])
});
}
验证器导致错误是因为此
的上下文在分配时更改为FormGroup
类:
'email': new FormControl(
null,
[Validators.required, Validators.email],
(control: FormControl) => this.forbiddenEmails
)
这就是为什么调用authService
时出现undefined
错误的原因,因为它查看的是FormGroup
类,而不是组件中的
注意:仅当用户试图提交表单或对电子邮件元素失去关注时,才检查禁止电子邮件
。把它放在验证器中是不好的,因为验证器往往要执行很多次
希望对您有所帮助您是否在@NgModule provid中添加了AuthService