我正在创建我的第一个Angular应用,并且在开发模式控制台中遇到以下错误:
错误错误:“找不到具有未指定名称属性的控件”
错误错误:“找不到路径为'items-> name'的控件”
错误错误:“找不到路径为'items-> height'的控件”
我已经阅读了几个SO答案(例如this,this this和this),但我无法指出我做错了什么,我对Angular的经验不足也有帮助。
这是我的组件打字稿代码:
import {Component, OnInit} from '@angular/core';
import {FormArray, FormBuilder, FormControl, FormGroup, Validators} from '@angular/forms';
@Component({
selector: 'app-pack-input',
templateUrl: './pack-input.component.html',
styleUrls: ['./pack-input.component.css']
})
export class PackInputComponent implements OnInit {
public boxForm: FormGroup;
constructor(private formBuilder: FormBuilder) { }
ngOnInit() {
this.boxForm = this.formBuilder.group({
items: this.formBuilder.array([this.createBox()])
});
}
createBox(): FormGroup {
return this.formBuilder.group({
name: ['', [Validators.required, Validators.minLength(3)]],
height: ['', [Validators.required, Validators.minLength(3)]],
width: ['', [Validators.required, Validators.minLength(3)]],
length: ['', [Validators.required, Validators.minLength(3)]],
weight: ['', [Validators.required, Validators.minLength(3)]]
});
}
get items(): FormArray {
return this.boxForm.get('items') as FormArray;
}
addItem(): void {
this.items.push(this.createBox());
}
public onSubmit(formValue: any) {
console.log(formValue);
}
}
这是我的html组件代码:
<div>
<div class="row">
<h3>Set the box size in meters</h3>
</div>
<form [formGroup]="boxForm" (ngSubmit)="onSubmit(boxForm.value)" >
<div class="row" formArrayName="items" *ngFor="let item of items.controls; let i = index;" [formGroupName]="i" style="margin-bottom: 10px">
<div class="form-group">
<div class="col-sm-5 form-group">
<label for="name">Name</label>
<input class="form-control" type="text" formControlName="name" placeholder="Name" />
</div>
<div class="col-sm-3 form-group">
<label for="name">Height</label>
<input class="form-control" type="text" formControlName="height" placeholder="Height" />
</div>
<div class="col-sm-3 form-group">
<label for="name">Width</label>
<input class="form-control" type="text" formControlName="width" placeholder="Width" />
</div>
<div class="col-sm-3 form-group">
<label for="name">Length</label>
<input class="form-control" type="text" formControlName="length" placeholder="Length"/>
</div>
<div class="col-sm-3 form-group">
<label for="name">Weight</label>
<input class="form-control" type="text" formControlName="weight" placeholder="Weight" />
</div>
<hr>
</div>
</div>
<button class="btn btn-success" type="submit" style="margin-right: 10px">Pack</button>
<button class="btn btn-primary" type="button" (click)="addItem()">New Box</button>
</form>
</div>
我在打字稿代码的formControlName="name"
和formControlName="height"
中看不到错字。我完全迷路了。
我在这里做什么错了?
答案 0 :(得分:5)
您不应在同一元素上使用FormArrayName和FormGroupName:
<div class="row" formArrayName="items" *ngFor="let item of items.controls; let i = index;">
<div class="form-group" [formGroupName]="i" >
答案 1 :(得分:1)
尝试在下一层声明您的formGroupName,像这样:
<div>
<div class="row">
<h3>Set the box size in meters</h3>
</div>
<form [formGroup]="boxForm" (ngSubmit)="onSubmit(boxForm.value)" >
<div class="row" formArrayName="items" *ngFor="let item of items.controls; let i = index;" style="margin-bottom: 10px">
<div class="form-group" [formGroupName]="i">
<div class="col-sm-5 form-group">
<label for="name">Name</label>
<input class="form-control" type="text" formControlName="name" placeholder="Name" />
</div>
<div class="col-sm-3 form-group">
<label for="name">Height</label>
<input class="form-control" type="text" formControlName="height" placeholder="Height" />
</div>
<div class="col-sm-3 form-group">
<label for="name">Width</label>
<input class="form-control" type="text" formControlName="width" placeholder="Width" />
</div>
<div class="col-sm-3 form-group">
<label for="name">Length</label>
<input class="form-control" type="text" formControlName="length" placeholder="Length"/>
</div>
<div class="col-sm-3 form-group">
<label for="name">Weight</label>
<input class="form-control" type="text" formControlName="weight" placeholder="Weight" />
</div>
<hr>
</div>
</div>
<button class="btn btn-success" type="submit" style="margin-right: 10px">Pack</button>
<button class="btn btn-primary" type="button" (click)="addItem()">New Box</button>
</form>
</div>