ERROR 错误:找不到带有路径的控件
[英] ERROR Error: Cannot find control with path
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问题描述
我是 Angular 的新手,并试图从以下位置扩展示例代码:Angular 4 Form FormArray 添加按钮添加或删除表单输入行
如果在下拉列表中选择了某个选项,则该选项的新选项应该是可表达的.我到了这一点没有问题,但是为那些低层选项"实现 formControlName 标签给我一个错误:
<块引用>
ContentComponent.html:56 ERROR 错误:找不到带有路径的控件:'inhalt ->0 ->optionsKey'(…)
.html 中的确切行是:(input formControlName="optionsKey")
我在其他线程中查找了这些错误(Angular 2 Form "找不到路径控制") 或 (Angular 2 Reactive Forms:找不到带有路径的控件)或(错误:找不到带有路径的控件:'x' angular 2),但他们的问题是基于在没有 FormBuilder 的情况下创建 ReactiveForm-Components.我使用 Formbuilder 创建了所有的 ReactiveForm 组件,您将在我的代码中看到.
我可能错过了什么或做错了吗?
content.html
<h3 class="page-header">Formular-Abschnitt hinzufügen</h3><按钮类型=按钮"(click)="addNewFormControl()";class=btn btn-primary">Neues Formularelement</button><br><form [formGroup]="formContent"><div><label>Bezeichnung des Abschnittes</label><input formControlName="absatz">
<div formArrayName="吸入"><!--在模板中我们迭代这个formarray,这只是formarray的路径,它是:invoiceForm.controls.itemRows.controls'invoiceForm' 是完整的表单对象,'controls' 是表单对象的内容,'itemRows' 是表单中的(表单)数组,'controls' 是表单数组的内容.--><div *ngFor="let itemrow of formContent.controls.inhalt.controls;让我=索引"[formGroupName]=i"><h4>公式元素#{{ i + 1 }}</h4><div class="form-group"><label>元素名称</label><input formControlName="label";class =表单控件">
<div class="form-group"><label>元素键</label><input formControlName="key";class =表单控件">
<div class="form-group"><label>Element-zwingend notwendig?</label><输入类型=复选框"formControlName=必填";class =表单控件">
<div class="form-group"><label>元素位置</label><input formControlName="订单";class =表单控件">
<div class="form-group"><label>Element-Art</label><select formControlName="controlType";class =表单控件"><option>InputField</option><option>复选框</option><option>单选按钮</option><option>下拉菜单</option><option>Beschreibungstext</option></选择><div [ngSwitch]=formContent.value.inhalt[i].controlType"><div *ngSwitchCase="'复选框'"><h3>可选定义:</h3><按钮(点击)=addFormControlOptions()">Neue Option hinzufügen</button><div *ngFor="let test of itemrow.controls.options.controls;让 x = 索引">{{test.controls.optionsKey.value}}<div><label >键:</label><input formControlName="optionsKey";>
<div><label>值:</label><输入>
<按钮(点击)=deleteFormControlOptions(x)">选项输入</button>
<div *ngSwitchCase="''"><p>loolololo</p>
<div *ngSwitchDefault=""><p>默认</p>
<button *ngIf="formContent.controls.inhalt.controls.length >1"(click)="deleteFormControl(i)";class="btn btn-danger"> 删除按钮按钮>
</表单><!--<pre>{{formContent.value |json}}</pre>--><按钮类型=提交"(click)=saveData()">Formular-Abschnitt Speichern</button>
content.ts
import { Component, OnInit } from '@angular/core';从 '@angular/forms' 导入 {Form、FormArray、FormBuilder、FormGroup};从 'util' 导入 {isBoolean, isNumber};@成分({选择器:'应用程序内容',templateUrl: './content.component.html',styleUrls: ['./content.component.css']})导出类 ContentComponent 实现 OnInit {公共表单内容:FormGroup;absatz;构造函数(私有_fb:FormBuilder){}ngOnInit() {this.formContent = this._fb.group({absatz: '',吸入:this._fb.array([this.initFormElements()])});}initFormElements() {返回 this._fb.group({标签: '',钥匙: '',顺序:isNumber(),控制类型:'',需要:isBoolean(),选项:this._fb.array([this.initFormElementOptions()])});}initFormElementOptions() {返回 this._fb.group({选项键:'',选项值:''});}addNewFormControl() {const control = <FormArray>this.formContent.controls['inhalt'];control.push(this.initFormElements());}deleteFormControl(索引:数字){const control = <FormArray>this.formContent.controls['inhalt'];control.removeAt(index);}保存数据() {返回 this.formContent.value;}addFormControlOptions() {//const control = <FormArray>this.formContent.controls['inhalt'].controls[0].options;//control.push(this.initFormElementOptions());}deleteFormControlOptions(index: number) {const control = <FormArray>this.formContent.controls['inhalt'].value[0].options;control.removeAt(index);}}
Plunker:https://embed.plnkr.co/LIcp9vpGDCAWH9qZacQT/
提前致谢!
更新:我需要添加一个 formArrayName="options"到我的 SwitchCase 和一个 formGroupName=x"(我使用了 ngFor 的索引 x)作为 ngFor-Div.
解决方案
你需要告诉你的控件进入数组组
<label >键:</label><input formControlName="optionsKey" >
I'm new to Angular and tried to extend the example code from: Angular 4 Form FormArray Add a Button to add or delete a form input row
If a certain option was picked in a dropdown, new options for that option should be expressable. I got to this point without problems, but implementing the formControlName Tags for those 'lower-tier-options' are throwing me an error:
ContentComponent.html:56 ERROR Error: Cannot find control with path: 'inhalt -> 0 -> optionsKey'(…)
the exact line in the .html is: (input formControlName="optionsKey" )
I looked for those errors in other threads(Angular 2 Form "Cannot find control with path") or (Angular 2 Reactive Forms: Cannot find control with path) or (Error: Cannot find control with path: 'x ' angular 2), but their problems are based on creating ReactiveForm-Components without the FormBuilder. I created all my ReactiveForm-Components with the Formbuilder, which you will see in my code.
Did I maybe miss something or am doing it the wrong way?
content.html
<h3 class="page-header">Formular-Abschnitt hinzufügen</h3>
<button type="button" (click)="addNewFormControl()" class="btn btn-primary">Neues Formularelement</button><br>
<form [formGroup]="formContent">
<div>
<label>Bezeichnung des Abschnittes</label>
<input formControlName="absatz">
</div>
<div formArrayName="inhalt">
<!--
In the template we are iterating this formarray,
and that is just the path to the formarray, which is:
invoiceForm.controls.itemRows.controls
'invoiceForm' being the complete form object, 'controls' being the content of the form object,
'itemRows' being the (form)array in the form, 'controls' being the content of the formarray.
-->
<div *ngFor="let itemrow of formContent.controls.inhalt.controls; let i=index" [formGroupName]="i">
<h4>Formular-Element #{{ i + 1 }}</h4>
<div class="form-group">
<label>Element-Name</label>
<input formControlName="label" class="form-control">
</div>
<div class="form-group">
<label>Element-Key</label>
<input formControlName="key" class="form-control">
</div>
<div class="form-group">
<label>Element-zwingend notwendig?</label>
<input type="checkbox" formControlName="required" class="form-control">
</div>
<div class="form-group">
<label>Element-Position</label>
<input formControlName="order" class="form-control">
</div>
<div class="form-group">
<label>Element-Art</label>
<select formControlName="controlType" class="form-control">
<option>InputField</option>
<option>Checkbox</option>
<option>Radiobutton</option>
<option>Dropdown</option>
<option>Beschreibungstext</option>
</select>
<div [ngSwitch]="formContent.value.inhalt[i].controlType">
<div *ngSwitchCase="'Checkbox'">
<h3>Optionen definieren:</h3>
<button (click)="addFormControlOptions()">Neue Option hinzufügen</button>
<div *ngFor="let test of itemrow.controls.options.controls; let x = index" >
{{test.controls.optionsKey.value}}
<div>
<label >Key: </label>
<input formControlName="optionsKey" >
</div>
<div>
<label>Value: </label>
<input>
</div>
<button (click)="deleteFormControlOptions(x)">Option entfernen</button>
</div>
</div>
<div *ngSwitchCase="''">
<p>lololololo</p>
</div>
<div *ngSwitchDefault="">
<p>DEFAULT</p>
</div>
</div>
</div>
<button *ngIf="formContent.controls.inhalt.controls.length > 1" (click)="deleteFormControl(i)"
class="btn btn-danger">Delete Button
</button>
</div>
</div>
</form>
<!--<pre>{{formContent.value | json}}</pre>-->
<button type="submit" (click)="saveData()">Formular-Abschnitt speichern</button>
content.ts
import { Component, OnInit } from '@angular/core';
import {Form, FormArray, FormBuilder, FormGroup} from '@angular/forms';
import {isBoolean, isNumber} from 'util';
@Component({
selector: 'app-content',
templateUrl: './content.component.html',
styleUrls: ['./content.component.css']
})
export class ContentComponent implements OnInit {
public formContent: FormGroup;
absatz;
constructor(private _fb: FormBuilder) { }
ngOnInit() {
this.formContent = this._fb.group({
absatz: '',
inhalt: this._fb.array([this.initFormElements()])
});
}
initFormElements() {
return this._fb.group({
label: '',
key: '',
order: isNumber(),
controlType: '',
required: isBoolean(),
options: this._fb.array([this.initFormElementOptions()])
});
}
initFormElementOptions() {
return this._fb.group({
optionsKey: '',
optionsValue: ''}
);
}
addNewFormControl() {
const control = <FormArray>this.formContent.controls['inhalt'];
control.push(this.initFormElements());
}
deleteFormControl(index: number) {
const control = <FormArray>this.formContent.controls['inhalt'];
control.removeAt(index);
}
saveData() {
return this.formContent.value;
}
addFormControlOptions() {
// const control = <FormArray>this.formContent.controls['inhalt'].controls[0].options;
// control.push(this.initFormElementOptions());
}
deleteFormControlOptions(index: number) {
const control = <FormArray>this.formContent.controls['inhalt'].value[0].options;
control.removeAt(index);
}
}
Plunker:
https://embed.plnkr.co/LIcp9vpGDCAWH9qZacQT/
Thanks in advance!
Update:
I needed to add a formArrayName="options" to my SwitchCase and a formGroupName="x"(where I used the index x of the ngFor) for the ngFor-Div.
解决方案
you need tell your control is into array group
<div formArrayName="options">
<label >Key: </label>
<input formControlName="optionsKey" >
</div>
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