Question

@Injectable()
export class ApiSearchEffects {

  @Effect()
  search$: Observable<any>
    = this.actions$
    .ofType(query.ActionTypes.QUERYSERVER)
    .debounceTime(300)
    .map((action: query.QueryServerAction) => action.payload)
    .switchMap(payload => {
      console.log(payload);
      const nextSearch$ = this.actions$.ofType(query.ActionTypes.QUERYSERVER).skip(1);

      this.searchService.getsearchresults(payload)
        .takeUntil(nextSearch$)
        .map((response) =>
          ({type: '[Search] Change', payload: response}
          ))
    });

上面的代码给出了类型＆＃39;（有效载荷：任何）=＆gt;的参数。空隙＆＃39;不能分配给＆＃39;类型的参数（值：any，index：number）=＆gt; ObservableInput＆＃39 ;. 键入＆＃39; void＆＃39;不能分配给＆＃39; ObservableInput＆＃39;。哪里可能是错误的。我在https://github.com/ngrx/effects/blob/master/docs/intro.md跟踪了ngrx特效官方介绍。

Answer 1

问题是你的switchMap应该返回一个值;它的回归无效。

试试这个

@Injectable()
export class ApiSearchEffects {

  @Effect()
  search$: Observable<any>
    = this.actions$
    .ofType(query.ActionTypes.QUERYSERVER)
    .debounceTime(300)
    .map((action: query.QueryServerAction) => action.payload)
    .switchMap(payload => {
      console.log(payload);
      const nextSearch$ = this.actions$.ofType(query.ActionTypes.QUERYSERVER).skip(1);

  return this.searchService.getsearchresults(payload)
        .takeUntil(nextSearch$)
        .map((response) =>
          ({type: '[Search] Change', payload: response}
          ))
    });

ngrx效果给出类型＆＃39; void＆＃39;不能分配类型＆＃39; ObservableInput＆＃39;

1 个答案: