Angular formArray 中的 formGroup,formGroup 无效,但 `formArray.valid` 为真

Angular formGroup inside formArray, formGroup is invalid, but `formArray.valid` is true

这是我的主要代码:

get emailFormArray() {
  return this.formGroup.get("emails") as FormArray;
}

public ngOnInit() {
  this.formGroup = this.formBuilder.group({
    emails: this.formBuilder.array([]),
  });
  this.addEmailFormGroup();
}

public addEmailFormGroup() {
  this.emailFormArray.controls.push(
    this.formBuilder.group({
      email: ['', Validators.email],
    }),
  );
}

在我的模板中

{{ formGroup.valid }}
{{ emailFormArray.valid }}
<ng-container *ngFor="let email of emailFormArray.controls">
  {{ email.valid }}
  {{ email.get('email').valid }}
</ng-container>

当我输入无效的电子邮件时,模板中的结果是true true false false,为什么formGroupemailFormArray是有效的?谢谢!

找到原因了。 我应该使用 this.emailFormArray.push 而不是 this.emailFormArray.controls.push

我在从数据库加载数据和更新数据时遇到了同样的问题,它没有保留验证规则。我设置direct value to form control as

的问题
loadSlideItemFromDB(slideShowItem): FormArray {
    const formArray = new FormArray([]);
    slideShowItem.forEach(item => {
      formArray.push(this.fb.group({
        id: item.Id,
        slideShowId: item.SlideShowId,
        pageType: item.PageType,
        linkUrl: item.LinkUrl,
        pageTitle: item.PageTitle
      }))
    });

    return formArray;
  }

重构代码后,我先创建带有验证规则的表单数组,然后 patchValue 为它创建。

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loadSlideItemFromDB(slideShowItem): FormArray {
    const formArray = new FormArray([]);
    slideShowItem.forEach(item => {
      let group = this.fb.group({
        id: [''],
        slideShowId: [''],      
        pageType: ['1', Validators.required],
        linkUrl: ['', Validators.required],
        pageTitle: ['']
      })
      group.patchValue({
        id: item.Id,
        slideShowId: item.SlideShowId,
        pageType: item.PageType,
        linkUrl: item.LinkUrl,
        pageTitle: item.PageTitle
      });
      formArray.push(group);
    });

    return formArray;
  }