Encountering the issue: "Unable to establish validator property on string 'control'"

Has anyone encountered this error message before? TypeError: Cannot create property 'validator' on string 'control'"

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('')]) });

  }

}

This is how the template has been structured:

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


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

Answer №1

String fieldsGroup was mistakenly passed to FormGroupDirective. It should be replaced with an instance of FormGroup:

[formGroup]="fieldsGroup"

Similarly, FormControlDirective requires an instance of FormControl

[formControl]="control"

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