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angular - 在angular2中访问嵌套数组对象时出现问题

问题描述

我如何访问下面给出的数组结构。如果我正在尝试这个，*ngFor="let item of bookedItems[0]" 我认为它只允许我访问数组 [0]数据。那么array[1], array[2]....array[n]呢？我怎么得到它们？

  [Array(2)]
      0: Array(2)
        0: {id: 2, name: "Calark", price: 375, …}
        1: {id: 5, name: "Eternis", price: 450, …}
        length: 2
      __proto__: Array(0)
      length: 1
      __proto__: Array(0)

内部组件

export class BookingComponent implements OnInit {
  bookedItems = [];
  constructor(private bookingService:BookingService) { }

  ngOnInit(){
    this.bookedData();
    console.log(this.bookedItems);
  }

  bookedData(){
    this.bookedItems = this.bookingService.getBookedItem();
  }
}

内模板 

<h3>Your Bookings:</h3>
<div *ngIf="bookedItems.length > 0; else plainText">
  <div class="cart-item" *ngFor="let item of bookedItems[0]">
<div class="flip-card">
  <div class="flip-card-inner">
          <div class="flip-card-front">
            <img [src]="item.imagePath" alt="{{item.name}}" class="img-responsive" style="max-height: 305px" width="293px">
          </div>


          <div class="flip-card-back">
            <small>
                  <p>Name: {{item.name}}</p>
                  <p>Size: {{item.size}}</p>
                  <p>Price: {{item.price}}</p>
                  <p>City: {{item.city}}</p>
                  <p>Address: {{item.address}}</p>
            </small>
          </div>

     </div>
     </div><hr/>
  </div>
</div>


<ng-template #plainText>
  <p>You haven't booked any item. please book to get your booking details!!!</p>
</ng-template>

标签： angulartypescript

解决方案

我认为你在这里肯定需要一个双循环，除非你有一个嵌套数组的事实是一个错误。如果不是，您可能应该使用像这样的“ng-container”指令=>

<h3>Your Bookings:</h3>
<div *ngIf="bookedItems.length > 0; else plainText">
  <ng-container *ngFor="let bookedItem of bookedItems">
    <div class="cart-item" *ngFor="let item of bookedItem">
      <div class="flip-card">
        <div class="flip-card-inner">
          <div class="flip-card-front">
            <img [src]="item.imagePath" alt="{{item.name}}" class="img-responsive" style="max-height: 305px"
                 width="293px">
          </div>
          <div class="flip-card-back">
            <small>
              <p>Name: {{item.name}}</p>
              <p>Size: {{item.size}}</p>
              <p>Price: {{item.price}}</p>
              <p>City: {{item.city}}</p>
              <p>Address: {{item.address}}</p>
            </small>
          </div>
        </div>
      </div>
      <hr/>
    </div>
  </ng-container>
</div>


<ng-template #plainText>
  <p>You haven't booked any item. please book to get your booking details!!!</p>
</ng-template>

我希望它对你有所帮助。

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