angular - 类型 'controls'上不存在属性 'AbstractControl' Angular 4 [duplicate]

This question already has answers here:

Angular2: Property 'controls' does not exist on type 'AbstractControl'. Error when accessing .control of an object within a formarray thru an index

(4个答案)


去年关闭。




我正在Angular 4中尝试嵌套的反应形式。它工作正常，但是当我尝试构建AOT时会抛出错误



我用谷歌搜索，尝试了几件事，但没有运气。谁能告诉我如何解决此问题？

<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>

下面的 typescript 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);
}

最佳答案

基于@GünterZöchbauer的评论，首先我改变了

html和 typescript 中的myForm.controls['addresses']到myForm.get('addresses')
然后根据@yuruzi评论

将myForm.get('addresses').controls更改为myForm.get('addresses')['controls']
现在工作正常。谢谢@gunter＆yuruzi

关于angular - 类型 'controls'上不存在属性 'AbstractControl' Angular 4 [duplicate]，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/46926182/