将数组插入formArray

Question

我正在动态创建两个字段，一个是选择框，另一个是p芯片（就像标签一样），现在我想将所有具有选择框id的标签插入formArray中，如果我传递p-返回的数组芯片在创建字段时会跳过第一个条目，因为当时数组为空。请检查img和代码，以更好地理解它们。

component.html

 <label>
        <div *ngFor="let t of a.controls; let i = index"  class="field-heading">Attribute (e.g. Colour)
      <div [formGroup]="t" >
        <select formControlName="attribute"  class="attr-dropdown">
          <option *ngFor="let value of attribute" [ngValue]="value.id">
            {{ value.name }}
          </option>
        </select>     
      </div> 
      <div class="flex-one">
        <label>
          <div class="field-heading">Value (e.g. Red, Blue, Green)</div>

          <p-chips inputStyleClass="full-width theme-input" (onAdd)="myfunc($event)"></p-chips>
        </label>
      </div>
      </div>

      </label>

<div class="add-variantes-row">

  <a >
    <div class="add-variant-btn"> + </div>
    <div class="ml-2 pointer" (click)="addAttitubute()">Add attribute</div>
  </a>

</div>

component.ts

 ngOnInit() {
    this.dynamicForm = this.formBuilder.group({
        attributes: new FormArray([])
    });
  }
get f() { return this.dynamicForm.controls; }
get a() { return this.f.attributes as FormArray; }
myfunc(event){
  this.array.push(event.value);
  console.log(this.dynamicForm.controls.attributes);
}

addAttitubute(){

    this.attributeService.getAttributes().subscribe(response =>{
        this.attribute=response;
        this.a.push(this.formBuilder.group({
            attribute: new FormControl (""),
            value: this.formBuilder.array(this.array)
        }));
        this.array=[];
    })     
}