Angular:找不到不同的支持对象 '[object Object]'

Question

我正在关注 this tutorial .在从 api.github 获取用户列表的过程中出现错误:

Cannot find a differ supporting object '[object Object]'

我认为它与

有关

 <ul>
 <li *ngFor = "#user of users">
 {{user | json}}
 </li>
 </ul>

在我的代码中，因为在它之前没有任何错误，我不确定数据是否来自 get 请求，只是点击没有给出任何错误，这是我目前的代码

@Component({
selector: 'router',
pipes : [],

template: `
<div>
<form [ngFormModel] = "searchform">
      <input type = 'text' [ngFormControl]= 'input1'/>
</form>
     <button (click) = "getusers()">Submit</button>
</div>
<div>
<ul>
    <li *ngFor = "#user of users">
    {{user | json}}
    </li>
</ul>
</div>
<router-outlet></router-outlet>
`,
directives: [FORM_DIRECTIVES]
})
export class router {
searchform: ControlGroup;
users: Array<Object>[];
input1: AbstractControl;

constructor(public http: Http, fb: FormBuilder) {
    this.searchform = fb.group({
        'input1': ['']
    })
    this.input1 = this.searchform.controls['input1']
}
getusers() {
    this.http.get(`https://api.github.com/
search/users?q=${this.input1.value}`)
        .map(response => response.json())
        .subscribe(
        data => this.users = data,
        error => console.log(error)
        )
}
}
bootstrap(router, [HTTP_PROVIDERS])

Answer 1

我认为您在响应负载中收到的对象不是数组。也许您要迭代的数组包含在一个属性中。您应该检查接收到的数据的结构...

你可以尝试这样的事情:

getusers() {
  this.http.get(`https://api.github.com/search/users?q=${this.input1.value}`)
    .map(response => response.json().items) // <------
    .subscribe(
      data => this.users = data,
      error => console.log(error)
    );
}

编辑

根据 Github 文档 (developer.github.com/v3/search/#search-users)，响应格式为:

{
  "total_count": 12,
  "incomplete_results": false,
  "items": [
    {
      "login": "mojombo",
      "id": 1,
      (...)
      "type": "User",
      "score": 105.47857
    }
  ]
}

因此用户列表包含在 items 字段中，您应该使用它:

getusers() {
  this.http.get(`https://api.github.com/search/users?q=${this.input1.value}`)
    .map(response => response.json().items) // <------
    .subscribe(
      data => this.users = data,
      error => console.log(error)
    );
}