Question

我是新手；请忍受我。

我需要获取id的ID列表=> this.getIds（）并使用mergeMap（）为ID列表中的每个ID获得其名称=> getNames（id）。有人可以在下面检查我做错了什么（无法编译）吗？

interface Id{
            "Id": string;
            "Name": string;
}
export interface Ids extends Array<Id>{}

在myservice.ts

 getIds():Ids {
  return this.http
  .post(url1, '')
  .pipe(map(({ Ids}: Ids) => Ids.map(item => ({Id: item.Id }))));
 }
getNames():Observable<any[]> {
 return this.http
    .post(url2, '')
    .pipe(map(({ Names }: any) => Names.map(item => ({Sid: item.Id, Name: item.Name }))));
}

在mycomponent.ts中，

getIds(): void {
 this.myservice
  .getIds.pipe(
  mergeMap(id => this.getNames(id)),
  mergeMap(names => names),
  toArray()
  )
}
getNames(): void {
 this.myservice
 .getNames(ids)
 .subscribe(val => this.data = val);
}

ERROR in src/app/myservice.ts(24,5): error TS2322: Type 'Observable<any>' is not assignable to type 'Ids'.
Property 'includes' is missing in type 'Observable<any>'.
src/app/myservice.ts(26,17): error TS2459: Type 'Ids' has no property 'Ids' and no string index signature.
src/app/mycomponent.ts(128,20): error TS2339: Property 'pipe' does not exist on type '() => Ids'.
src/app/mycomponent.ts(129,35): error TS2345: Argument of type '{}' is not assignable to parameter of type 'Ids'.
Property 'includes' is missing in type '{}'. src/app/mycomponent.ts(130,19): error TS2345: Argument of type '(vulns: {}) => {}' is not assignable to parameter of type '(value: {}, index: number) => ObservableInput<{}>'.
Type '{}' is not assignable to type 'ObservableInput<{}>'.
Type '{}' is not assignable to type 'Iterable<{}>'.
Property '[Symbol.iterator]' is missing in type '{}'.

Angular中带有管道的mergeMap

0 个答案: