angular - 在字符串 "TypeError: Cannot create property ' 上获取错误 'control' 验证程序“

Question

我收到错误:TypeError:无法在字符串“control”上创建属性“validator””

import { Component, ChangeDetectionStrategy, OnInit } from '@angular/core';
import { CommonModule } from '@angular/common';
import { BrowserModule } from '@angular/platform-browser';
import { DataStorageService, FieldConfig, ImportType } from '../../../../services/datastorage.service';
import { ReactiveFormsModule, FormGroup, FormArray, FormControl } from '@angular/forms';


import * as Papa from 'papaparse';
@Component({
  selector: 'field-analysis',
  templateUrl: './field-analysis.component.html'
})

export class FieldAnalysisComponent implements OnInit {

  fieldsGroup;

  ngOnInit() {
    this.fieldsGroup = new FormGroup({ fieldset: new FormArray([new FormControl(''), new FormControl('')]) });

  }

}

模板看起来像这样。

<h2 >Field Definition</h2>
<form formGroup="fieldsGroup" novalidate>


<input *ngFor="let control of fieldsGroup.controls['fieldset'].controls" formControl="control">
</form>

Answer 1

您将字符串 fieldsGroup 传递给 FormGroupDirective。您应该改为传递 FormGroup 实例:

[formGroup]="fieldsGroup"

FormControlDirective 也需要 FormControl 实例

[formControl]="control"