问在调用api之前检查ngrx效果中的存储数据时会遇到问题

EN

@Injectable()
export class AnalyticsEffects {

  @Effect({dispatch: false}) loadAnalytics = this.actions$
    .pipe(
      ofType<GetAnalyticsAction>(AnalyticsTypes.GET_ANALYTICS),
      withLatestFrom(**/* cannot make this line to work */**),
      mergeMap(
        /* api call to get analytics data from server */
        () => this.analyticsService.getAnalyticsData()
          .pipe(
            map(data => {
              console.log('the data from api is...', data);
              return new GetAnalyticsAction(data)
            }),
            catchError(error => of(console.log("error in api request of analytics....")))
          )
      )
    )

  constructor(
    private actions$: Actions,
    private analyticsService: AnalyticsService,
    private store$: Store<AnalyticsState>
  ) { }
} 

import {Action} from '@ngrx/store';
import {AnalyticsModel} from './analytics.model';
import {AnalyticsTypes} from './analytics.types';

export const GET_ANALYTICS = AnalyticsTypes.GET_ANALYTICS;

export class GetAnalyticsAction implements Action{
  readonly type = GET_ANALYTICS;
  constructor(public payload: AnalyticsModel) {
    console.log('payload sent from home is -> ', payload);
  }
}

export type Actions = GetAnalyticsAction

import {AnalyticsModel} from './analytics.model';

export interface AnalyticsState {
  readonly analyticsModel: AnalyticsModel[];
}

import {Action} from '@ngrx/store';
import {AnalyticsModel} from './analytics.model';
import * as AnalyticsAction from './../analytics/analytics.actions';

const defaultState: AnalyticsModel = {
  result: null,
}

export function reducer(state: AnalyticsModel[] = [defaultState], action: AnalyticsAction.Actions ){
  switch (action.type) {
    case AnalyticsAction.GET_ANALYTICS:
      console.log("store action type is -> ",action.type);
      console.log("store changed state is -> ",action.payload);
      return [...state, action.payload]
    default:
      return state
  }
}

  constructor(private store: Store<AnalyticsState>) {
    this.analyticsModel = store.select( state => {state.analyticsModel} );
  }

  ngOnInit() {
    this.store.dispatch(new ActionGetAnalytics.GetAnalyticsAction(this.newAnalyticsItem));
    this.newAnalyticsItem = { result: [] };
  }