0

首先,我知道(或者我想我已经读过)你永远不应该从减速器中触发动作。在我的情况下,我redux-oidc用于处理针对我的应用程序的身份验证。用户登录后,redux-oidc触发一个操作并在切片redux-oidc/USER_FOUND中设置用户的个人资料。state.oidc.user

登录后,我需要从我的数据库中查找不在 OIDC 响应中的有关用户的其他信息。目前,我正在按fetchUserPrefs预期redux-oidc.CallbackComponent.successCallback工作。

我的问题是当用户有一个活跃的会话并打开一个新的浏览器,或者手动刷新页面并再次初始化应用程序时,回调没有被命中,所以额外的用户水合作用不会发生。似乎想要做的是添加一个extraReducer监听redux-oidc/USER_FOUND动作并触发 thunk 的操作,但这会从减速器触发一个动作。

有一个更好的方法吗?

import {createAsyncThunk, createSlice} from '@reduxjs/toolkit';
import { RootState } from '../../app/store';
import {User} from "oidc-client";

export const fetchUserPrefs = createAsyncThunk('user/fetchUserPrefs', async (user: User, thunkAPI) => {
    // the call out to grab user prefs
    // this works as expected when dispatched from the CallbackComponent.successCallback
    return user;
})

function hydrateUserState(state: any, action: any) {
    // set all the state values from the action.payload
    // this works as expected
}

export interface UserState {
    loginId: string;
    firstName: string;
    lastName: string;
    email: string;
    photoUrl: string;
}

const initialState: UserState = {
    loginId: '',
    firstName: '',
    lastName: '',
    email: '',
    photoUrl: '',
};

export const userSlice = createSlice({
    name: 'user',
    initialState,
    reducers: {
    },
    extraReducers: (builder) => {
        builder
            .addCase('redux-oidc/USER_FOUND', fetchUserPrefs) // I want to do this, or something like it
            .addCase(fetchUserPrefs.fulfilled, hydrateUserState)
            .addDefaultCase((state, action) => {})
    }
});

export const selectUser = (state: RootState) => state.user;
export default userSlice.reducer;
4

1 回答 1

1

你是正确的,你不能从减速器中分派一个动作。您想监听要调度的动作并调度另一个动作作为响应。这是中间件的工作。您的中间件应如下所示:

import { USER_FOUND } from 'redux-oidc';
import { fetchUserPrefs } from "./slice";

export const oicdMiddleware = (store) => (next) => (action) => {
  // possibly dispatch an additional action
  if ( action.type === USER_FOUND ) {
    store.dispatch(fetchUserPrefs);
  }
  // let the next middleware dispatch the 'USER_FOUND' action
  return next(action);
};

您可以阅读有关自定义中间件的文档以获取更多信息。

于 2021-05-27T22:42:53.643 回答