角度材料表文本过滤 - rxjs - 合并http获取结果与过滤器主题

Question

我想应用Angular Material Text Filtering的示例使用来自http get调用的数据。

export class MyDtoDataSource extends DataSource<IMyDto> { 
     private _filterChange = new BehaviorSubject(''); 
     public get filter(): string { return this._filterChange.value; } 
     public set filter(filter: string) { this._filterChange.next(filter); } 

     constructor(private _apiService: ApiService) { 
      super() 
     } 

     connect(): Observable<IMyDto[]> { 

      const displayDataChanges = [ 
       this._apiService.getMyDtos(), 
       this._filterChange, 
      ]; 

      return Observable 
      .merge(...displayDataChanges) 
      .map((dtos: IMyDto[]) => dtos.filter(dto => dto.categories.map(i => i.name).includes(this.filter))); 
     } 

    disconnect() { 
    } 
} 

不过，我想有我地图的问题，因为我得到的运行时错误dtos.filter is not a function

Answer 1

韩国社交协会以@cartant为点我到正确的方向。

connect(): Observable<IMyDto[]> { 
    return Observable 
     .combineLatest(this._apiService.getMyDtos(), this._filterChange) 
     .map(([dtos, filter]) => dtos.filter(dto => dto.categories.map(i => i.name).includes(filter))); 
}