Ionic：使用formBuilder时，ion-radio值无法工作。表单控件名称“”没有值访问器。

Question

Ionic：使用formBuilder时，ion-radio值无法工作。表单控件名称“”没有值访问器。

angularionic-frameworkangular2-formbuilder

3

我正在为移动应用程序构建一个表单。

我使用ion-radio创建了两组单选框。一组用于选择鱼的性别，另一组用于选择成功捕获后鱼的命运。但我无法让这些单选框与formBuilder一起使用。

我收到两条错误消息，分别引用CatchPage.html文件中的第113行和第114行。这两个错误消息是相同的，除了行号不同，因此我只在此处放置一个。

CatchesPage.html:113 ERROR Error: No value accessor for form control with name: 'catchSex'
    at _throwError (forms.es5.js:1830)
    at setUpControl (forms.es5.js:1740)
    at FormGroupDirective.addControl (forms.es5.js:4711)
    at FormControlName._setUpControl (forms.es5.js:5299)
    at FormControlName.ngOnChanges (forms.es5.js:5217)
    at checkAndUpdateDirectiveInline (core.es5.js:10790)
    at checkAndUpdateNodeInline (core.es5.js:12216)
    at checkAndUpdateNode (core.es5.js:12155)
    at debugCheckAndUpdateNode (core.es5.js:12858)
    at debugCheckDirectivesFn (core.es5.js:12799)

这些错误之后，我得到了什么。

ERROR Error: Uncaught (in promise): Error: No value accessor for form control with name: 'catchSex'
Error: No value accessor for form control with name: 'catchSex'
    at _throwError (forms.es5.js:1830)
    at setUpControl (forms.es5.js:1740)
    at FormGroupDirective.addControl (forms.es5.js:4711)
    at FormControlName._setUpControl (forms.es5.js:5299)
    at FormControlName.ngOnChanges (forms.es5.js:5217)
    at checkAndUpdateDirectiveInline (core.es5.js:10790)
    at checkAndUpdateNodeInline (core.es5.js:12216)
    at checkAndUpdateNode (core.es5.js:12155)
    at debugCheckAndUpdateNode (core.es5.js:12858)
    at debugCheckDirectivesFn (core.es5.js:12799)
    at _throwError (forms.es5.js:1830)
    at setUpControl (forms.es5.js:1740)
    at FormGroupDirective.addControl (forms.es5.js:4711)
    at FormControlName._setUpControl (forms.es5.js:5299)
    at FormControlName.ngOnChanges (forms.es5.js:5217)
    at checkAndUpdateDirectiveInline (core.es5.js:10790)
    at checkAndUpdateNodeInline (core.es5.js:12216)
    at checkAndUpdateNode (core.es5.js:12155)
    at debugCheckAndUpdateNode (core.es5.js:12858)
    at debugCheckDirectivesFn (core.es5.js:12799)
    at c (polyfills.js:3)
    at Object.reject (polyfills.js:3)
    at Tab.NavControllerBase._fireError (nav-controller-base.js:322)
    at Tab.NavControllerBase._failed (nav-controller-base.js:310)
    at nav-controller-base.js:365
    at t.invoke (polyfills.js:3)
    at Object.onInvoke (core.es5.js:4128)
    at t.invoke (polyfills.js:3)
    at r.run (polyfills.js:3)
    at polyfills.js:3

我对我的“catchFate”单选按钮组也收到了类似的错误消息。

来自catches.html的HTML片段。整个.html页面可以在这里查看https://pastebin.com/vKW2vp7F。

  <ion-row radio-group [(ngModel)]="catchSexSelection" [ngModelOptions]="{standalone: true}">
    <ion-item no-lines>
      <h2>Sex</h2>
    </ion-item>
    <!--FISH SEX-->
    <ion-col col-4>
      <ion-item no-lines>
        <ion-label>
          <ion-icon name="male"></ion-icon> Male</ion-label>
        <ion-radio value="male" formControlName="catchSex"></ion-radio>
      </ion-item>
    </ion-col>
    <ion-col col-4>
      <ion-item no-lines>
        <ion-label>
          <ion-icon name="female"></ion-icon> Female</ion-label>
        <ion-radio value="female" formControlName="catchSex"></ion-radio>
      </ion-item>
    </ion-col>
    <ion-col col-4>
      <ion-item no-lines>
        <ion-label>Unknown</ion-label>
        <ion-radio value="unknown" formControlName="catchSex"></ion-radio>
      </ion-item>
    </ion-col>
  </ion-row>

整个表单（包括所有字段和单选按钮选择器）都在一个 formGroup 中。

<form [formGroup]="addCatchForm" (submit)="addToDb()" novalidate>
...Entire form...    
</form>

从catches.ts中提取的相关部分

import { Component } from '@angular/core';
import { IonicPage, NavController, NavParams, AlertController } from 'ionic-angular';
import { FormBuilder, FormGroup, Validators } from '@angular/forms';
import { AuthProvider } from '../../providers/auth/auth';
import { ProfileProvider } from '../../providers/profile/profile';
import * as moment from 'moment';

@IonicPage(
  { name: 'CatchesPage' }
)
@Component({
  selector: 'page-catches',
  templateUrl: 'catches.html',
})
export class CatchesPage {
  addCatchForm: FormGroup;

  userProfile: any;
  userName: string;

  catchSpecies: string;
  catchSexSelection: string;
  catchWeight: number = 0;
  catchLength: number = 0;
  catchGirth: number = 0;
  catchFate: string;

  lureType: string;
  fate: boolean;

  currentDate: string = moment().format();


  constructor(public navCtrl: NavController, public navParams: NavParams, public authProvider: AuthProvider, public profileProvider: ProfileProvider, private alertCtrl: AlertController, public formBuilder: FormBuilder) {

    this.addCatchForm = formBuilder.group({
      catchCaughtBy: ['', Validators.compose([Validators.required])],
      catchDate: ['', Validators.compose([Validators.required])],
      catchLocation: ['', Validators.compose([Validators.required])],
      catchLocationDesc: [''],
      catchSpecies: [''],
      catchSexSelection: [''],
      catchWeight: [''],
      catchLength: [''],
      catchGirth: [''],
      lureModel: [''],
      lureType: [''],
      lureTechnique: [''],
      catchFate: ['']
    });

  }

Ionic / Angular 版本

Ionic Framework: 3.3.0
Ionic App Scripts: 1.3.7
Angular Core: ^4.1.2
Angular Compiler CLI: ^4.1.2
Node: 7.10.0
OS Platform: Windows 10
Navigator Platform: Win32
User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/58.0.3029.110 Safari/537.36

我不明白为什么会出现这些错误。我已经在每个选择中定义了value属性，并且每个选择都具有相同的formControlName。每个选择都在同一个radio-group中。

我的登录页面使用了formBuilder，它运行良好，但是单选框输入让我头疼。

我决定使用formBuilder，因为将来可能需要使用某种验证方式。我只想让功能正常工作并使用addToDb方法将数据发送到firebase，然后再深入进行验证。

我该怎么办？

- ex1tium

2个回答

2

首先不要同时使用“响应式表单”和“模板驱动表单”。

您还可以使用以下方法来避免错误“Error: No value accessor for form control with name: 'catchSex'”。

<ion-row radio-group ngDefaultControl formControlName="catchSex">
    <ion-item no-lines>
      <h2>Sex</h2>
    </ion-item>
    <!--FISH SEX-->
    <ion-col col-4>
      <ion-item no-lines>
        <ion-label>
          <ion-icon name="male"></ion-icon> Male</ion-label>
        <ion-radio value="male"></ion-radio>
      </ion-item>
    </ion-col>
    <ion-col col-4>
      <ion-item no-lines>
        <ion-label>
          <ion-icon name="female"></ion-icon> Female</ion-label>
        <ion-radio value="female"></ion-radio>
      </ion-item>
    </ion-col>
    <ion-col col-4>
      <ion-item no-lines>
        <ion-label>Unknown</ion-label>
        <ion-radio value="unknown"></ion-radio>
      </ion-item>
    </ion-col>
  </ion-row>

ngDefaultControl需要添加以避免该错误。

我也是用同样的方法解决了这个问题。

- Kunal Kakkad

网页内容由stack overflow 提供, 点击上面的

可以查看英文原文，
原文链接

- Sajeetharan · Accepted Answer

尝试将控件绑定到组而不是单独的对象：

<ion-row radio-group  formControlName="catchSex" [(ngModel)]="catchSexSelection" [ngModelOptions]="{standalone: true}">
    <ion-item no-lines>
      <h2>Sex</h2>
    </ion-item>
    <!--FISH SEX-->
    <ion-col col-4>
      <ion-item no-lines>
        <ion-label>
          <ion-icon name="male"></ion-icon> Male</ion-label>
        <ion-radio value="male"></ion-radio>
      </ion-item>
    </ion-col>
    <ion-col col-4>
      <ion-item no-lines>
        <ion-label>
          <ion-icon name="female"></ion-icon> Female</ion-label>
        <ion-radio value="female"></ion-radio>
      </ion-item>
    </ion-col>
    <ion-col col-4>
      <ion-item no-lines>
        <ion-label>Unknown</ion-label>
        <ion-radio value="unknown"></ion-radio>
      </ion-item>
    </ion-col>
  </ion-row>