如何访问 HTML 中的 formGroup 以传递给动态添加的组件 [英] How to access a formGroup in HTML to pass to a component added dynamically

问题描述

我正在使用一些配置创建一个动态表单

我正在关注 Todd Motto 的博客链接

以下是我的表格

它包含嵌套的 FormGroups所以我的配置包含许多部分.Section包含多个fieldGroup，fieldGroup可以包含多个字段

这些字段是formControl，我正在传递[组](参见ng-container)对于这个组，我想通过 formGroup.现在我只传递一个字符串

<md-tab-group><div *ngFor="让 config.sections 的部分" ><md-tab label={{section.title}} formGroupName={{section.title}}><div *ngFor="let fieldGroup of section.fieldGroups" ><div class="card-block card mb-3" formGroupName={{fieldGroup.name}}><ng-container *ngFor="让 fieldGroup.fields 的字段;"dynamicField [config]="field" [group]="fieldGroup.name"></ng-容器>

</md-tab>

</md-tab-group><按钮>提交</表单>

这是我的 component.ts

ngOnInit(): void {this.form = this.createForm();控制台日志(this.form)；}创建表单(){const group = this.fb.group({});this.config.sections.forEach(section=>group.addControl(section.title,this.addFieldGroups(section)));返回组；}addFieldGroups(section): FormGroup{const group = this.fb.group({});section.fieldGroups.forEach(fieldGroup=>group.addControl(fieldGroup.name,this.addFieldGroup(fieldGroup)));返回组；}addFieldGroup(fieldGroup): FormGroup{const group = this.fb.group({});fieldGroup.fields.forEach(field=>group.addControl(field.name, this.createControl(field)));返回组；}创建控制(配置){const { 禁用，验证，值 } = 配置；return this.fb.control({ disabled, value }, 验证);}

解决方案

嗯，我没有得到任何答案，所以这就是我所做的

在 ng-container 中的 HTML

[group]="getFormGroup(section.title,fieldGroup.name)"`

所以我正在调用一个传递字符串的函数

这就是我检索 formGroup 的方式

getFormGroup(sectionName,fieldGroupName){var section = this.myForm.controls[sectionName] as FormGroup;var fieldGroup =section.controls[fieldGroupName];返回字段组；}

I am creating a dynamic form using some configuration

i am following a blog by Todd Motto Link

Following is my form

It contains nested FormGroups so my config contain a number of section. Section contains a number of fieldGroup and fieldGroup can contain a number of fields

these fields are formControl, to this i am passing [group] (see ng-container) to this group i want to pass formGroup. Right now i am passing just a string

<form
  class="dynamic-form"
  [formGroup]="form"
  (submit)="handleSubmit($event)">

  <md-tab-group>
    <div *ngFor="let section of config.sections" >
      <md-tab label={{section.title}} formGroupName={{section.title}}>
        <div *ngFor="let fieldGroup of section.fieldGroups" >
            <div class="card-block card mb-3" formGroupName={{fieldGroup.name}}>
              <ng-container *ngFor="let field of fieldGroup.fields;" dynamicField [config]="field" [group]="fieldGroup.name">
              </ng-container>
            </div>
        </div>
      </md-tab>
    </div>
  </md-tab-group>
  <button>Submit</button>
</form>

and this is my component.ts

ngOnInit(): void {
  this.form = this.createForm();
  console.log(this.form);
}

 createForm(){
    const group = this.fb.group({});
    this.config.sections.forEach(section=>group.addControl(section.title,this.addFieldGroups(section)));
    return group;
    }



addFieldGroups(section): FormGroup{
    const group = this.fb.group({});
    section.fieldGroups.forEach(fieldGroup=>group.addControl(fieldGroup.name,this.addFieldGroup(fieldGroup)));
    return group;
  }



addFieldGroup(fieldGroup): FormGroup{
    const group = this.fb.group({});
    fieldGroup.fields.forEach(field=>group.addControl(field.name, this.createControl(field)));
    return group;
  }



createControl(config) {
    const { disabled, validation, value } = config;
    return this.fb.control({ disabled, value }, validation);
  }

解决方案

Well i didnt get any answer so this is what i have done

in HTML in ng-container

[group]="getFormGroup(section.title,fieldGroup.name)"`

so i am calling a function passing the strings

and this is how i am retrieving formGroup

getFormGroup(sectionName,fieldGroupName){
    var section = this.myForm.controls[sectionName] as FormGroup;
    var fieldGroup =section.controls[fieldGroupName];
    return fieldGroup;
  }

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