如何在angular2的表单数组中显示嵌套数组数据?

How can display nested array data in form array in angular2?

我已经在 angular2 项目中实现了 FormGroup 来呈现表单,并且我已经使用 formArray 来获取嵌套数组数据

form.component.html

<div class="col-md-12" formArrayName="social_profiles">
  <div *ngFor="let social of resumeForm.controls.social_profiles.controls; let i=index" class="panel panel-default m-t-10">
    <div class="panel-heading" style="min-height: 30px;">
      <span class="glyphicon glyphicon-remove pull-right" *ngIf="resumeForm.controls.social_profiles.controls.length > 1" (click)="removeSocialProfiles(i)"></span>
    </div>
    <div class="panel-body" [formGroupName]="i">
      <social-profile [group]="resumeForm.controls.social_profiles.controls[i]"></social-profile>
    </div>
  </div>
</div>

form.component.ts

export class FormComponent implements OnInit {
    public resumeForm: FormGroup;

    constructor(private formBuilder: FormBuilder) {}

    ngOnInit() {
        this.resumeForm = this.formBuilder.group({
            name: ['', Validators.required],
            label: ['',],
            email: [''],
            phone: [''],  
            social_profiles: this.formBuilder.array([])
        });

        this.addSocialProfiles();
    }

    initSocialProfiles() {
        return this.formBuilder.group({
            network: [''],
            url: ['']
        });
    }

    addSocialProfiles() {
        const control = <FormArray>this.resumeForm.controls['social_profiles'];
        const addrCtrl = this.initSocialProfiles();        
        control.push(addrCtrl);      
    }

    removeSocialProfiles(i: number) {
        const control = <FormArray>this.resumeForm.controls['social_profiles'];
        control.removeAt(i);
    }
}

其中 social-profile 是数组的子形式

社交-profile.component.html

<div [formGroup]="socialForm">
    <div class="col-md-6">
        <input type="text" class="form-control" placeholder="Enter Network" formControlName="network">
    </div>
    <div class="col-md-6">
        <input type="text" class="form-control" placeholder="Enter Network URL" formControlName="url">
    </div>
</div>

社交-profile.component.ts

export class SocialProfileComponent {
    @Input('group')
    public socialForm: FormGroup;
}

从服务回调中获取JSON

{
    "basics_info": {
        "name": "Joh Doe",
        "label": "Programmer",
        "Social_profiles": [{
            "network": "Twitter",
            "url": "https://www.twitter.com/kumarrishikesh12"
        }, {
            "network": "Facebook",
            "url": "https://www.facebook.com/kumarrishikesh12"
        }]
    }
}

添加数据表格工作完美但我如何在页面初始化编辑时以表格形式显示 json 的现有嵌套数组(从 api 获取)?喜欢下图

这里假设您已经从 object basics_info 中提取了内容,即:

并将 JSON 分配给变量 data,这样您就可以得到 data 的内容:

{
    "name": "Joh Doe",
    "label": "Programmer",
    "Social_profiles": [{
        "network": "Twitter",
        "url": "https://www.twitter.com/kumarrishikesh12"
    }, {
        "network": "Facebook",
        "url": "https://www.facebook.com/kumarrishikesh12"
    }]
}

然后让我们修补这些值。您可以在收到数据后收到 JSON(或构建表单)后修补这些值。在这里,我在构建表单后修补值。

下面我想澄清一下,在 patchValues 中调用另一个方法,它实际上设置了值。

patchValues() {
  const control = <FormArray>this.resumeForm.controls['social_profiles'];
  this.data.Social_profiles.forEach(x => { // iterate the array
     control.push(this.patch(x.network, x.url)) // push values
  });
}

patch(network, url) {
  return this.fb.group({
    network: [network],
    url: [url]
  });
}

child 应该可以捕捉到这些变化。这是给你的演示,变量不同,因为我使用了现有的表格。但是道理完全一样。

Plunker