如何将单个形式的两个部分组合成角形?

时间:2018-11-19 18:40:07

标签: javascript json angular typescript angular-reactive-forms

我正在使用角度动态形式进行角度应用程序,其中我正在通过JSON加载动态形式的数据。

JSON有两个部分,例如第1部分和第2部分

  jsonDataPart1: any = [
    {
      "elementType": "textbox",
      "class": "col-12 col-md-4 col-sm-12",
      "key": "project_name",
      "label": "Project Name",
      "type": "text",
      "value": "",
      "required": false,
      "minlength": 3,
      "maxlength": 20,
      "order": 1
    },
    {
      "elementType": "textbox",
      "class": "col-12 col-md-4 col-sm-12",
      "key": "project_desc",
      "label": "Project Description",
      "type": "text",
      "value": "",
      "required": true,
      "order": 2
    }
  ]

  jsonDataPart2: any = [
            {
          "elementType": "textbox",
          "class": "col-12 col-md-4 col-sm-12",
          "key": "property_one",
          "label": "Property One",
          "type": "text",
          "value": "",
          "required": true,
          "order": 3
        },
        {
          "elementType": "textbox",
          "class": "col-12 col-md-4 col-sm-12",
          "key": "property_two",
          "label": "Property Two",
          "type": "text",
          "value": "",
          "required": true,
          "order": 4
        },
        {
          "elementType": "radio",
          "class": "col-12 col-md-3 col-sm-12",
          "key": "property_required",
          "label": "Property Required",
          "options": [
            {
              "key": "required",
              "value": "Required"
            },
            {
              "key": "not_required",
              "value": "Not Required"
            }
          ],
          "order": 5
        },
        {
          "elementType": "checkbox",
          "class": "col-12 col-md-3 col-sm-12",
          "key": "property_check",
          "label": "Property Required",
          "order": 6
        }
  ]

我正在将JSON作为单独的部分加载,

  ngOnInit() {
    //Building form first part
    this.questions = this.service.getQuestions(this.jsonDataPart1)
    this.form = this.qcs.toFormGroup(this.questions);

        //Building form second part
    this.questionsPartTwo = this.service.getQuestions(this.jsonDataPart2)
    this.formPartTwo = this.qcs.toFormGroupPartTwo(this.questionsPartTwo);
  }

HTML看起来像

<div>
    <form (ngSubmit)="onSubmit()" [formGroup]="form">

 <h4> <b> Form Part One begins from here </b> </h4>
        <div *ngFor="let question of questions" class="form-row">
            <ng-container>
                <app-question [question]="question" [form]="form"></app-question>
            </ng-container>
        </div>

 <h4> <b> Form Part Two begins from here </b> </h4>

    <div *ngFor="let partTwo of questionsPartTwo">
                <ng-container>
                <app-question [question]="partTwo" [form]="formPartTwo"></app-question>

            </ng-container>
        </div>

        <div class="form-row">
            <button type="submit" [disabled]="!form.valid">Save</button>
    </div>
  </form> <br>

  <pre>
{{form?.value|json}}
</pre>
</div>

我需要将两者结合起来,并且需要为整个单一表格获取单一输出。

在我的真实应用程序中,我有两个json数据,分别加载并分配表单,所以请不要分解第一和第二部分json。

让我在这里停止代码,因为它可能会使您感到困惑。

这是一个有效的堆叠闪电战: https://stackblitz.com/edit/angular-x4a5b6-2rykpo

只需采取变通方法dynamic-form.component.ts and dynamic-form.component.html,您就会清楚我所做的事情。

请帮助我将拆分后的JSON加载到this.service.getQuestions并获得两个部分,并将两者都加入最终输出以提交。

如果我的方法不对,请帮我纠正它,因为我是角度和动态形式的新手。它必须是角度动态形式,并且json仅加载其中的任何内容。 >

我期望的帮助是在提交表格时将第1部分和第2部分结合起来。

请帮助我,我坚持了很长时间才出来。

2 个答案:

答案 0 :(得分:1)

您可以采取几种方式

1.-创建一个{{form1:form1的问题,form2:form2的问题}

的formJoin

在您的ngOnInit中

formJoin:FormGroup;
ngOnInit()
{
    this.questions = this.service.getQuestions(this.jsonDataPart1)
    this.form = this.qcs.toFormGroup(this.questions);

    this.questionsPartTwo = this.service.getQuestions(this.jsonDataPart2)
    this.formPartTwo = this.qcs.toFormGroup(this.questionsPartTwo);

    this.formJoin=new FormGroup({form1:this.form,form2:this.formPartTwo})
}

//In your .html 
<form (ngSubmit)="onSubmit()" [formGroup]="formJoin">

2.-在唯一的json中加入问题

this.allquestions=this.service.getQuestions(
        this.jsonDataPart1.concat(this.jsonDataPart2));
this.formJoin2=this.qcs.toFormGroup(this.allquestions);
//get the first question.key in the second form
this.questionBreak=this.jsonDataPart2[0].key;

//In your .html
<form  (ngSubmit)="onSubmit()" [formGroup]="formJoin2">

 <h4> <b> An uniq Form </b> </h4>
    <div *ngFor="let question of allquestions" class="form-row">
       <!--make a break fro the secondForm-->
       <ng-container *ngIf="question.key==questionBreak">
           <h4> <b> Form Part Two begins from here </b> </h4>
       </ng-container>
        <ng-container>
            <app-question [question]="question" [form]="formJoin2"></app-question>
        </ng-container>
    </div>
 </form>

重要说明:服务toFormGroup和toFormGroupPartTwo中不需要具有两个功能。如果看到的是相同的函数,则可以用不同的参数“馈送”该函数,但它是相同的函数。

the stackblitz中,两个选项同时存在

更新 更新代码以休息一下,

答案 1 :(得分:1)

使用顶级表单并将您的子表单包装在父表单中,并使用提供程序来使用现有表单

Parent.component.html

<form [formGroup]="form" (ngSubmit)="onClick();">
    <h1>Part1</h1>
    <div class="row" formArrayName="part1" *ngFor="let c of form['controls']['part1']['controls'];let i =index">
        <div class="col">
            <input [attr.type]="jsonDataPart1[i].type"
        class="form-control" [attr.placeholder]="jsonDataPart1[i].label"
         [formControlName]="i" >
    </div>
  </div>

  <app-part2 [part2]="jsonDataPart2">
     <h1>Part2</h1>
  </app-part2>
<br>
<button class="btn btn-primary">Save</button>
</form>

child.component.ts

import { Component, OnInit, Input } from '@angular/core';
import { FormGroup, FormControl, ControlContainer, FormGroupDirective, FormArray } from '@angular/forms';
@Component({
  selector: 'app-part2',
  templateUrl: './part2.component.html',
  styleUrls: ['./part2.component.css'],
  viewProviders: [{ provide: ControlContainer, useExisting: FormGroupDirective }]
})
export class Part2Component implements OnInit {
  @Input('part2') part2;
  part2Form;
  constructor(private parentForm: FormGroupDirective) { }

  ngOnInit() {
    this.part2Form = this.parentForm.form;
    const control = this.part2.map(d => new FormControl());
    this.part2Form.addControl('part2F', new FormGroup({
      part2: new FormArray(control)
    }))
  }
}

示例:https://stackblitz.com/edit/angular-xrrabj