我正在 Angular 4 中尝试嵌套反应形式。它工作正常，但是当我尝试构建 AOT 时，它会抛出错误
“AbstractControl”类型中不存在“controls”
我用谷歌搜索并尝试了一些东西但没有运气。谁能告诉我如何解决这个问题？
<div [formGroup]="myForm">
<div formArrayName="addresses">
<div *ngFor="let address of myForm.get('addresses').controls; let i=index"
class="panel panel-default">
<span *ngIf="myForm.get('addresses').length > 1"
(click)="removeAddress(i)">Remove</span>
<div [formGroupName]="i">
<mat-form-field>
<input matInput formControlName="city" placeholder="city" value="">
</mat-form-field>
</div>
</div>
</div>
<a (click)="addAddress()" style="cursor: default"> Add +</a>
</div>
下面是打字稿代码
constructor(private _fb: FormBuilder) {
}
ngOnInit() {
this.myForm = this._fb.group({
addresses: this._fb.array([
this.initAddress(),
])
});
}
initAddress() {
return this._fb.group({
city: ['']
});
}
addAddress() {
const control = <FormArray>this.myForm.get('addresses');
control.push(this.initAddress());
}
removeAddress(i: number) {
const control = <FormArray>this.myForm.get('addresses');
control.removeAt(i);
}
根据@Günter Zöchbauer 的评论，首先我改变了
myForm.controls['addresses'] to myForm.get('addresses')在 html 和 typescript 中
然后根据@yuruzi 评论
changed myForm.get('addresses').controls to myForm.get('addresses')['controls']
现在工作正常。谢谢@gunter 和 yuruzi
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