在angular6中动态创建formarray

Question

我正在尝试在json中循环并形成一个反应式表单组。

我的设置如下所示

createForm (data) {
    let fgs: FormGroup[] = data.map(d => {
      let fg = new FormGroup({
        domainname: new FormControl(d.domainname, Validators.required),
        projectid: new FormControl(d.projectid, Validators.required),
        projectname: new FormControl(d.projectname, Validators.required),
      });
      return fg;
    });
    let forecastArray = new FormArray(fgs);
    this.forecastForm = this.fb.group({
         allForecast: forecastArray
    });        
}

get forecastsData(): FormArray { 
    return this.forecastForm.get('allForecast') as FormArray; 
  }

我有一个Primeng数据表，正在集成上述结构。

<form [formGroup]="forecastForm">
<div formArrayName="forecastsData">
<p-dataTable [value]="forecastForm.get('allForecast').value" [editable]="true" #dt [rows]="15" [paginator]="true" (onEdit)="onEdit($event)"
(onEditComplete)="onEditComplete($event)">
  <p-column field="id" hidden="hidden"></p-column>
  <p-column field="domainname" header="Domain" sortable="true" [filter]="true" filterMatchMode="contains" [editable]="true">   
     <ng-template let-col let-row="rowData" pTemplate="body">
        {{row.domainname}}
     </ng-template>
     <ng-template let-col let-row="rowData" let-rowIndex="rowIndex" pTemplate="editor"> 
          <div [formGroupName]="rowIndex">
          <input type="text" [(ngModel)]="row.domainname" style="width:100%"
          [ngClass]="{'error': !row.domainname}"  
          (change)="domainChangeEvt($event.target.value, row)"
          [formControlName]="domainname" > 
        </div>  
     </ng-template> 
  </p-column>
  <p-column field="projectid" header="Project ID" sortable="true" [filter]="true" filterMatchMode="contains" [editable]="true">
   <ng-template let-col let-row="rowData" pTemplate="body">
      {{row.projectid}}
   </ng-template>
   <ng-template let-col let-row="rowData" pTemplate="editor" let-rowIndex="rowIndex"> 
      <div [formGroupName]="rowIndex">
      <select [(ngModel)]="row.projectid"  style="width:100%"  (change)="setProject($event.target.value,row)"  [formControlName]="projectid">
          <option *ngFor="let proj of projectList" [value]="proj.projectCode">{{proj.projectCode}}</option>
      </select>
    </div>
   </ng-template>
  </p-column>    
  <p-column field="projectname" header="Project Name" sortable="true" [filter]="true" filterMatchMode="contains" [editable]="false">
   <ng-template let-col let-row="rowData" pTemplate="body">
      {{row.projectname}}
   </ng-template>
   <ng-template let-col let-row="rowData" pTemplate="editor" let-rowIndex="rowIndex">   
        <div [formGroupName]="rowIndex">
      <input type="text" [(ngModel)]="row.projectname" style="width:100%"
      [ngClass]="{'error': !row.projectname}" [formControlName]="projectname">   
       </div> 
   </ng-template>
  </p-column>  
</p-dataTable>
</div>
</form>

但是在控制台中我总是会出错

任何人都可以指出我在这里做错了什么吗？