如何解决如何正确键入 fp-ts ObservableEither#fold?
我正在尝试使用 fp-ts 和 redux-observable 来构建一些处理某些 api 请求的史诗。我在使用 fp-ts-rxjs/ObservableEither#fold 时遇到问题,如果我不将操作转换为 AnyAction
类型,我会收到一个类型错误,提示这两种类型应该相同。
Type 'Observable<{ payload: { user: User<Attributes>; }; type: string; }>' is not assignable to type 'Observable<{ payload: { error: Error | null; }; type: string; }>'.
Type '{ payload: { user: User<Attributes>; }; type: string; }' is not assignable to type '{ payload: { error: Error | null; }; type: string; }'.
Types of property 'payload' are incompatible.
Property 'error' is missing in type '{ user: User<Attributes>; }' but required in type '{ error: Error | null; }'
我也尝试过使用 fp-ts-rxjs/ObservableEither#bimap,因为它期望返回两种不同的类型。但是,这会导致运行时错误,指出操作不能具有未定义的类型。我也不确定那里到底发生了什么。
LoginSlice.ts
const loginSlice = createSlice({
name: 'login',initialState,reducers: {
loginSuccess (state,action: PayloadAction<{ user: User }>) {
state.loggedIn = true;
},loginReset (state) {
state.error = null;
},loginFail (state,action: PayloadAction<{ error: Error | null } >) {
state.error = action.payload.error;
}
}
});
LoginService.ts
const loginService = (credentials: LoginInfo): OE.ObservableEither<Error,User> => {
const { username,password } = credentials;
return OE.fromTaskEither(
TE.tryCatch(
async () => await User.logIn(username,password),error => error as Error
)
);
};
LoginEpics.ts
export const loginEpic: Epic = (action$: ActionsObservable<AnyAction>) => action$.pipe(
filter(login.match),mergeMap((action) =>
loginService(action.payload.credentials).pipe(
fold(
(error) => of(loginFail({ error }) as AnyAction),(user) => of(loginSuccess({ user }) as AnyAction)
)
)
)
);
有没有办法避免将动作转换为 AnyAction
?任何见解将不胜感激。
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