loadProducts$ = createEffect(() =>
    this.actions$.pipe(
      ofType(PurchaseContractActions.loadProducts),
      switchMap(() =>

        this.fleaSrv.getPurchaseContractList().pipe(
          tap(products => console.log('purchase contracts:', products)),
          map(products => PurchaseContractActions.loadProductsSuccess({ products })),
          catchError((err: Error) =>
            of(ErrorActions.errorMessage({ errorMsg: err.message }),
              SpinnerActions.hide())
          )
        )
      )
    ))