Javascript 如何在角度上将可观测值与阵列匹配

代码如下：

//this is the code that I tried it return undefined
this.server$.subscribe(param => {
      console.log(param);
      const sample = param.find(x => x === data.server);
      console.log(sample);
    });

return this.fb.group({
  server: [data && data['server'] || '', [Validators.required, Validators.email]],
});

此.server$

的数据可观察到：

[{
code: "S1"
createdBy: "admin"
id: "1cUMlNRSamZHD"
name: "Server1"
status: "ACTIVE"
timeCreated: "2019-09-13 17:02:33"
timeUpdated: "2019-09-19 14:38:41"
},{
code: "S2"
createdBy: "admin"
id: "w1lPuzJ8iJQp"
name: "Server2"
status: "ACTIVE"
timeCreated: "2019-08-30 15:24:44"
timeUpdated: "2019-12-10 16:54:17"
},{
code: "S3"
createdBy: "admin"
id: "HIEkQKjpM54V"
name: "Server3"
status: "ACTIVE"
timeCreated: "2019-08-05 11:00:59"
timeUpdated: "2019-08-05 11:00:59"
},{
code: "S4"
createdBy: "admin"
id: "1foD7MVZRwYzr"
name: "Server4"
status: "ACTIVE"
timeCreated: "2019-08-30 21:06:23"
timeUpdated: "2019-12-10 16:54:22"
}]

例如，单击要更新的数据。 然后是

data.server的值

    server :[{
    id: 1foD7MVZRwYzr,
    code: S4,
    name: Server4
    },{
    id: HIEkQKjpM54V,
    code: S3,
    name: Server3
    }]

我想要的是

当它单击有两个服务器或1个服务器的项目时

它应该在可观察的范围内找到它

它将显示在
nz选择多个

<nz-select formControlName="server" name="server" nzPlaceHolder="Select server(s)" [nzMode]="'multiple'" nzAllowClear>
              <nz-option *ngFor="let server of (server$ | async)" [nzLabel]="server.name" [nzValue]="server"></nz-option>
            </nz-select>

我尝试了这个方法，但它没有显示在
nz select
上。您需要声明一个存储响应的变量：

打字稿：

fooData;

this.server$.subscribe(param => {
  console.log(param);
  this.fooData = param.find(x => x === data.server);
  console.log(this.fooData);
});

HTML:

HTML:

您需要声明一个存储响应的变量：

打字稿：

fooData;

this.server$.subscribe(param => {
  console.log(param);
  this.fooData = param.find(x => x === data.server);
  console.log(this.fooData);
});

HTML:

HTML:


您应该阅读订阅服务器的文档，并尝试使用此
const server=this.server$.value.filter（param=>data.server.find（x=>x.id==param.id））但它不会显示在
nz select
上，您认为const的范围是什么？这样的声明永远不会出现在binding@Panda
数据['server']
意味着什么？我没有看到
数据
变量？@KurtHamilton数据['server']
server=[{id:1foD7MVZRwYzr，code:S4，name:Server4}，{id:HIEkQKjpM54V，code:S3，name:Server3}]
您应该阅读订阅的文档，然后尝试使用此
const server=this.server$.value.filter（param=>data.server.find（x=>x.id==param.id））但它不会显示在
nz select
上，您认为const的范围是什么？这样的声明永远不会出现在binding@Panda
数据['server']
意味着什么？我没有看到
数据
变量？@KurtHamilton数据['server']<代码>服务器=[{id:1foD7MVZRwYzr，代码：S4，名称：Server4}，{id:HIEkQKjpM54V，代码：S3，名称：Server3}]
<nz-select 
    formControlName="server" name="server" 
    nzPlaceHolder="Select server(s)" [nzMode]="'multiple'" nzAllowClear>
    <nz-option 
        *ngFor="let server of fooData" 
        [nzLabel]="server.name" [nzValue]="server">
    </nz-option>
</nz-select>

server$

ngOnInit() {
    this.server$ = this.someApMethod.getAll();
}

<nz-select formControlName="server" name="server" 
    nzPlaceHolder="Select server(s)" [nzMode]="'multiple'" nzAllowClear>
    <nz-option *ngFor="let server of (server$ | async)" [nzLabel]="server.name" 
        [nzValue]="server">
    </nz-option>
</nz-select>