在角度6

时间:2018-09-16 16:19:10

标签: javascript angular

我正在从数组中删除数据并尝试更新视图,但是它不起作用。

  async deleteProduct(e) {
    try {
      const data = await this.rest.get(environment.apiUrl + `/api/seller/products/delete/?id=${e.target.id}`);
      data['success'] ? this.products = (this.products.filter(e => e != (data['products'].id))) : this.data.error(data['message']);
    } catch (error) {
      this.data.error(error['message']);
    }
  }

HTML:

<section id="myProducts">
  <div class="container p-5">
    <app-message></app-message>
    <div *ngIf="!products" class="m-auto">
      <h1 class="text-center display-3 mt-5">
        <i class="fa fa-spinner fa-spin"></i>
      </h1>
    </div>
    <h3 *ngIf="products && !products.length" class="display-2 text-center mt-5">My Products is Empty</h3>
    <div *ngIf="products && products.length" class="row">
      <div class="col">
        <h4 class="display-4">My Products</h4>
        <div class="row">
          <div class="offset-10 col-2 d-none d-md-block">
            <p>
              <small class="text-muted">Price</small>
            </p>
          </div>
        </div>
        <hr class="mt-0">
        <div *ngFor="let product of products" class="product">
          <div class="row">
            <div class="col-4 col-md-2">
              <a routerLink="/product/{{ product.id }}">
                <img src="{{ product.image }}" alt="image" class="img-fluid img-thumbnail">
              </a>
            </div>
            <div class="col-5 col-md-8">
              <h5>
                <a routerLink="/product/{{ product.id }}">{{ product.title }}</a>
                <p class="m-0">
                  <small class="text-muted">{{ product.category.name }}</small>
                </p>
              </h5>
            </div>
            <div class="col-2">
              <h6 class="font-weight-bold text-danger" >{{ product.price | currency : 'INR' }}</h6>
            </div>
            <div class="col-2">
              <button type="button" class="btn btn-info" id="{{product.id}}" (click)="editProduct($event)" [disabled]="btnDisabled">Edit</button>
            </div>
            <div class="col-2">
              <button type="button" class="btn btn-info" id="{{product.id}}" (click)="deleteProduct($event)" [disabled]="btnDisabled">Delete</button>
            </div>
          </div>
          <hr>
        </div>
      </div>
    </div>
  </div>
</section>

从数组中删除项目后,我试图像这样更新对象:

this.products = (this.products.filter(e => e != (data['products'].id)))

2 个答案:

答案 0 :(得分:0)

似乎您的视图无法检查products数组的更改。

所以我想说手动触发它:

注入ChangeDetectorRef以手动触发更改检测。

constructor(private cd: ChangeDetectorRef){....}

然后在您的方法中调用this.cd.detectChanges()

async deleteProduct(e) {
    ...
    data['success'] ? this.products = (this.products.filter(e => e != (data['products'].id))) : this.data.error(data['message']);
    this.cd.detectChanges();
    ...
}

答案 1 :(得分:0)

您正在将e与!= e ['products']。id .. 这不是真的。 我认为您应该检查在您的“ e”中保存ID的变量

这意味着

e.id!= ...或类似的东西。

我希望它能正常工作。