使用嵌套ngFor的Angular 2 [英] Angular 2 using nested ngFor

问题描述

使用以下代码时出现此错误:

I get this error when using the below code:

找不到类型为对象"的其他支持对象"[对象对象]".

Cannot find a differ supporting object '[object Object]' of type 'object'.

做嵌套的ngFor时，有什么方法可以解决此问题?

Is there any way to workaround this problem when doing nested ngFor ?

import { Component,OnInit } from '@angular/core';

@Component({
  selector: 'my-app',
  template: `
    <div id="results">
      <div *ngFor="let mem of members">
        {{mem.id}}
        <div class="card-container">
          <div *ngFor="let case of mem.cases">
            {{case.id}}
          </div>
        </div>
      </div>
    </div>
    `,
})

export class AppComponent implements OnInit {
  public members = { "members": [ 
    { "name" : "Ana", "id" : "001", 
      "cases" : [
        {"id" : "992", "casenumber" : "882"},
        {"id" : "242", "casenumber" : "344"},
      ]} , 
    { "name" : "Ina", "id" : "002", 
      "cases" : [
        {"id" : "532", "casenumber" : "234"},
        {"id" : "734", "casenumber" : "346"},
      ]} ,
    { "name" : "Ora", "id" : "003", 
      "cases" : [
        {"id" : "235", "casenumber" : "974"},
        {"id" : "458", "casenumber" : "125"},
      ]}
    ] 
  }
  ngOnInit(){
    console.log(this.members);
  }
}

推荐答案

您的顶级迭代是错误的，您要迭代的数组位于members.members内部，因此应该是:

Your top level iteration is wrong, the array you want to iterate is inside members.members, so it should be:

  <div *ngFor="let mem of members.members"> // here
    {{mem.id}}
    <div class="card-container">
      <div *ngFor="let case of mem.cases">
        {{case.id}}
      </div>
    </div>
  </div>

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