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我有一个表，我需要在其中呈现数据库值，然后在用户更改后我需要提交该表单。这是演示

我需要申请，如果状态为“已消除”或“缺席”，则需要禁用排名下拉菜单，排名将为空/0。

我能够呈现详细信息并尝试更改状态以禁用排名，但它不起作用。

请帮助和指导。谢谢。

TS

import { Component } from '@angular/core';
import {
  AbstractControl,
  FormArray,
  FormBuilder,
  FormControl,
  FormGroup,
  Validators,
} from '@angular/forms';
import { merge } from 'rxjs';
import { takeWhile, tap } from 'rxjs/operators';

@Component({
  selector: 'my-app',
  templateUrl: './app.component.html',
  styleUrls: ['./app.component.css'],
})
export class AppComponent {
  name = 'Angular';
  myForm!: FormGroup;
  rankArray = [];
  rankStatusArray: any = [
    { id: 'participated', name: 'Participated' },
    { id: 'eliminated', name: 'Eliminated' },
    { id: 'absent', name: 'Absent' },
  ];
  checklist = [
    {
      id: 13,
      rank: 3,
      horse_id: 86,
      horse_name: 'test232 fdfgdg',
      life_number: null,
      country: 'Afghanistan',
      result_status: 'participated',
      comment: 'my comment',
    },
    {
      id: 12,
      rank: null,
      horse_id: 87,
      horse_name: 'test horse',
      life_number: '234234',
      country: 'Algeria',
      result_status: null,
      comment: null,
    },
    {
      id: 11,
      rank: null,
      horse_id: 88,
      horse_name: 'tesdfs',
      life_number: null,
      country: 'Afghanistan',
      result_status: null,
      comment: null,
    },
    {
      id: 10,
      rank: null,
      horse_id: 94,
      horse_name: 'nam horse',
      life_number: 'fh345',
      country: 'India',
      result_status: null,
      comment: null,
    },
  ];

  constructor(private fb: FormBuilder) {
    this.myForm = this.fb.group({
      checklist: this.fb.array([]),
    });
    this.populate();
  }

  ngOnInit(): void {
    this.rankArray = Array(4)
      .fill(1)
      .map((x, i) => i + 1);
  }

  get formChecklist() {
    return this.myForm.get('checklist') as FormArray;
  }

  populate() {
    this.checklist.forEach((x) => {
      this.formChecklist.push(
        this.fb.group({
          participantId: x.id,
          rankStatus: x.result_status,
          rank: x.rank,
          comment: x.comment,
          horse_name: x.horse_name,
          country: x.country,
          life_number: x.life_number,
        })
      );
    });
  }

  onChange(event) {
    console.log(event);
    if (event == 'eliminated' || event == 'absent') {
      this.myForm.controls['rank'].disable();
    } else {
      this.myForm.controls['rank'].enable();
    }
  }

  onSubmit() {
    console.log(this.myForm.value);
  }
}

HTML

<div class="table-responsive competition_wrapper">
  <form [formGroup]="myForm" (ngSubmit)="onSubmit()">
    <table
      class="
        bordered
        border-top-0
        table
        dark
        shadow_none
        w-100
        mb-3
        competition_result_table
      "
    >
      <thead>
        <tr>
          <th width="150" colspan="6">Competition Name</th>
        </tr>
      </thead>
      <tbody formArrayName="checklist">
        <tr class="table_sub_heading">
          <td>Status</td>
          <td>Rank</td>
          <td>Participant Name</td>
          <td>Country</td>
          <td>Life Number</td>
          <td>Comment</td>
        </tr>
        <tr
          *ngFor="let item of formChecklist.controls; let i = index"
          [formGroupName]="i"
        >
          <td>
            <div class="select_wrapper form-group mb-0">
              <select
                class="form-control"
                formControlName="rankStatus"
                (ngModelChange)="onChange($event)"
              >
                <option [ngValue]="null">Select</option>
                <option
                  *ngFor="let status of rankStatusArray"
                  [ngValue]="status.id"
                >
                  {{ status.name }}
                </option>
              </select>
            </div>
          </td>
          <td>
            <div class="select_wrapper form-group mb-0">
              <select class="form-control" formControlName="rank">
                <option value="null">Select</option>
                <option *ngFor="let rankno of rankArray" [value]="rankno">
                  {{ rankno }}
                </option>
              </select>
            </div>
          </td>
          <td>{{ item.get('horse_name').value }}</td>
          <td>
            {{ item.get('country').value }}
          </td>
          <td>
            {{ item.get('life_number').value }}
          </td>
          <td>
            <div class="form-group mb-0">
              <textarea
                type="text"
                class="form-control"
                formControlName="comment"
              ></textarea>
            </div>
          </td>
        </tr>
      </tbody>
    </table>
    <button class="btn">Add Result</button>
  </form>
</div>

<pre>{{ myForm.value | json }}</pre>
4

1 回答 1

0

你列举了很多点，因为这不是一个免费的代码提供程序应用程序，我不会解决所有问题，至少，直到你尝试做某事。

话虽如此，我创建了一个演示来解决我看到您尝试但无法完成的第一个问题。您无法禁用排名字段，因为：

  • 首先，您在onchange函数中传递的事件不是您想要的。您需要事件的价值，即使如此，您也需要提取对您很重要的信息，即 id。
  • 其次，您试图禁用/启用不存在的东西。控制台给了你关于它的错误。this.myForm.controls['rank']未定义。

关于步骤n.4，您可能需要收听排名表单控件并从下一个竞争对手的排名下拉列表中隐藏所选选项。希望这能给您解决问题的提示。

于 2021-12-16T11:12:04.097 回答