第二次动作调度在 RxJS 和 Angular 6 中不起作用

Action dispatch the second time doesn't effect in RxJS and Angular 6

我有一个管理登录的@Effect。步骤如下:

一切正常。这是auth.effects.ts的代码:

@Injectable()
export class AuthEffects {
    constructor(private store: Store<fromApp.AppState>, private actions$: Actions, private router: Router, private authService: AuthService, private route: ActivatedRoute, private toastr: ToastrService) {
    }
    tokenObj: { token: string };
    @Effect()
    authLogin$ = this.actions$
        .ofType(AuthActions.DO_LOGIN)
        .pipe(map((action: AuthActions.DoLogin) => {
            return action.payload;
        })
            , switchMap((authData: { email: string, password: string }) => {
                return from(this.authService.login(authData.email, authData.password));
            })
            , map(tokenObj => this.tokenObj = tokenObj) 
            , withLatestFrom(this.store.select(('core')))
            , take(1)
            , map(([action, storeState]) => {
                if (storeState.redirectUrl) {
                    this.router.navigate([storeState.redirectUrl]);
                } else {
                    this.router.navigate(['/']);
                }
            })
            , mergeMap(() => {
                return [
                    {
                        type: AuthActions.LOGIN 
                    },
                    {
                        type: AuthActions.SET_TOKEN,
                        payload: this.tokenObj.token
                    },
                    {
                        type: ProfileActions.DECODE_TOKEN,
                        payload: this.tokenObj.token
                    },
                    {
                        type: CoreActions.REMOVE_REDIRECT_URL
                    }
                ];
            })
            , catchError((err, caught) => {
                this.toastr.error(err.message);
                // Quindi, alla fine, torniamo l'Observable di errore, affinché si possa ri-provare l'operazione
                return caught;
            })
        );
}

这是login.component.ts里面的函数:

 onLogin(form: NgForm) {
    const email = form.value.email;
    const password = form.value.password;
    this.store.dispatch(new AuthActions.DoLogin({ email: email, password: password }));
  }

这是header.component.ts中触发注销的函数:

onLogout() {
    this.store.dispatch(new AuthActions.Logout());
    this.store.dispatch(new ProfileActions.CancelLoggedUser());
    this.router.navigate(['/login']);
}

问题 是:如果我注销,我再次输入电子邮件和密码,然后按登录,但没有任何反应。特别是,打开 Ngrx DevTools,我看到 DO_LOGIN 已调度(具有表单的 属性 值)但未调用服务器。事件如果我在效果中放置一个断点,它不会触发。为什么?

这是所有操作的屏幕:登录--->主页--->注销--->第二次登录:

问题来自取消订阅可观察到的效果的take(1)

一个ngrx effect是一个单例,一旦退订就永远不会再订阅。