Angular NgRx-选择有效的AppState

我在我的NgRx应用程序中有一个效果，它需要将一个动作作为“副作用”与该效果应该发送的主要最终动作一起发送。但是这个“副作用操作”取决于我需要从AppState中选择的状态键

我担心我的实现方式是不正确的，因为当AppState键更改时，总是调度副作用操作。我知道使用NgRx选择器会创建一个可观察的流，但我不知道正确的实现方法是什么

以下是我的效果：

createNewTask$ = createEffect(() => this.actions$.pipe(
  ofType(fromAgendaActions.createNewTask),
  concatMap(action => this.agendaService.createNewTask(action.payload)
    .pipe(
      tap(() => {
        this.store.select(selectCurrentDate).subscribe(currentDate => {
          if(moment(action.payload.followUpDate).isBefore(moment().startOf('date'))) {
            this.store.dispatch(fromAgendaActions.getOverdueTasks());
          }
          if(moment(currentDate).startOf('date').isSame(moment(action.payload.followUpDate))) {
            this.store.dispatch(fromAgendaActions.getTasks({ payload: { date: moment(currentDate).format('DD-MM-YYYY') }}));
          }
            });
      }),
      map(() => fromAgendaActions.createNewTaskSuccess()),
      catchError(() => of({ type: fromAgendaActions.AgendaActionsTypes.CreateNewTaskFail, error: 'error' }))
    )
)));

---

尚未尝试，但以下操作应该可以：

createNewTask$ = createEffect(() =>
  this.actions$.pipe(
    ofType(fromAgendaActions.createNewTask),
    withLatestFrom(this.store.select(selectCurrentDate)),
    concatMap(([action, currentDate]) =>
      this.agendaService.createNewTask(action.payload).pipe(
        concatMap(() => {
          const actions = [];
          if (
            moment(action.payload.followUpDate).isBefore(
              moment().startOf('date')
            )
          ) {
            actions.push(fromAgendaActions.getOverdueTasks());
          }

          if (
            moment(currentDate)
              .startOf('date')
              .isSame(moment(action.payload.followUpDate))
          ) {
            actions.push(
              fromAgendaActions.getTasks({
                payload: { date: moment(currentDate).format('DD-MM-YYYY') },
              })
            );
          }

          actions.push(fromAgendaActions.createNewTaskSuccess());

          return from(actions).map(a => of(a));
        }),
        catchError(() =>
          of({
            type: fromAgendaActions.AgendaActionsTypes.CreateNewTaskFail,
            error: 'error',
          })
        )
      )
    )
  )
);

---

很高兴听到这个消息：）