对 ngrx 影响的操作类型不匹配

Type mismatch on action on ngrx effect

我用这 3 个动作创建了一个动作文件:

export const showLoading = createAction(`[application] Show warning notification`);
export const hideLoading = createAction(`[application] Show error notification`);
export const showHttpResponseError = createAction(`[application] Show success notification`, props<{ error: HttpErrorResponse, nextAction: Action }>());

export type Actions = ReturnType<
typeof showLoading |
typeof hideLoading |
typeof showHttpResponseError
>;

然后我创建了一个这样的效果文件:

@Injectable()
export class ApplicationEffects
{
    constructor(private actions$: Actions, private dialogsService: DialogsService, public notificationsService: NotificationService, private router: Router) { }

    @Effect() public erroHandler$ = this.actions$
        .pipe(
            ofType(ApplicationActions.showHttpResponseError.type),
            switchMap(action => {
                    const emptyAction = { type: 'noop' };
                    const error = HttpErrorHandler.handle(action.error);

                    if (error.redirectTo != null) {
                        this.router.navigate([error.redirectTo]);
                        return of(emptyAction);
                    }

                    if (action.error.status === 400) {
                        this.notificationsService.notifyWarning('AVISO', error.messages);
                    }
                    else {
                        this.dialogsService.errorDialog('ERRO', error.messages[0]);
                    }

                    return action.nextAction ? of(action.nextAction) : of(emptyAction);
                },
            ));
}

但出于某种原因,VS Code 智能感知无法识别 switchMap 中的操作类型,它表示其类型为 never:

我错过了什么吗?或者我怎么能强制执行它的类型,因为动作是使用 ngrx 动作创建者创建的,我没有明确的类型。

为了将来参考,如果有人遇到同样的问题,解决方案是键入注入的 actions$ 变量:

private actions$: Actions<ApplicationActions.Actions>

然后智能感知工作,你不需要在 switchMap

中强制执行类型

为了完整性,有多种方式:

1) ofType 运算符的类型

ofType<AddAction>(CounterActions.AddAction)

2) 键入注入的操作,就像您已经回答的那样(从 NgRx 7 开始)

constructor(private actions$: Actions<CounterActions.Actions>

3) createEffectcreateAction 结合使用(从 NgRx 8 开始)

foo$ = createEffect(() => this.actions$.pipe(
    ofType(addAction),
    ...
);