React Redux 工具包不发送 Async Thunk答案

【问题标题】：React Redux Toolkit Doesn't Dispatch Async ThunkReact Redux 工具包不发送 Async Thunk
【发布时间】：2022-12-21 13:02:30
【问题描述】：

我正在使用 Redux/Toolkit，我想使用 Async Thunk 进行身份验证过程。但是当我尝试分派该函数时它会返回一个错误。

在这种情况下我该怎么办？这是我第一次使用 Async Thunk，所以我不知道如何面对这个问题。

顺便说一下，我正在使用 Typescript。所以，我认为这个问题主要是关于 Typescript 的。

userSlice.tsx 文件：

import {createSlice, createAsyncThunk} from "@reduxjs/toolkit"
import {InterfaceUserSlice} from "../typescript/interfaceUserSlice"
import axios from "../axios"

export const UserLogin = createAsyncThunk("/users/authentication", async (user:{email:string,password:string}) => {
  try{
    const res = await axios.post("/users/authentication", user)
    ...
  } catch(err){
    ...
  }
})

const initialState:InterfaceUserSlice = {
  ...
}

const userSlice = createSlice({
  name: "user",
  initialState,
  reducers: {},
  extraReducers: (builder) => {}
})

export default userSlice.reducer

import React, {useState} from "react"
import { useDispatch } from "react-redux"
import { UserLogin } from "../redux/userSlice"

const Login = () => {

  const dispatch = useDispatch()

  const [email, setEmail] = useState<string>("")
  const [password, setPassword] = useState<string>("")
  
  function LoginRequest(){
    dispatch(UserLogin({email,password})) //This is the point that I have the error which says: "Argument of type 'AsyncThunkAction<void, { email: string; password: string; }, AsyncThunkConfig>' is not assignable to parameter of type 'AnyAction'."
  }
  
  return (
    ...
  )
}

export default Login

【问题讨论】：

标签： javascript reactjs typescript redux-toolkit redux-thunk

【解决方案1】：

尝试将参数的类型传递给createAsyncThunk：

type ReturnedType = any // The type of the return of the thunk
type ThunkArg = { email:string, password:string } 

export const UserLogin = createAsyncThunk<ReturnedType, ThunkArg>("/users/authentication", async (user) => {
  try{
    const res = await axios.post("/users/authentication", user)
    ...
  } catch(err){
    ...
  }
})

【讨论】：

问题转向了这个：“'AsyncThunkAction<any, { email: string; password: string; }, AsyncThunkConfig>' 类型的参数不可分配给 'AnyAction' 类型的参数。”所以，它一直在继续......

【解决方案2】：

如果你使用 TypeScript，你总是应该在 genric 中为你的 asyncThunk 设置返回类型和参数

export const UserLogin = createAsyncThunk<return type, arguments>("/users/authentication", async (user) => {
  try{
    const res = await axios.post("/users/authentication", user)
    ...
  } catch(err){
    ...
  }
})

而且你还应该创建自定义钩子 useDispatch 和 useSelector

import { useSelector, useDispatch, TypedUseSelectorHook } from "react-redux";

import type { RootState, AppDispatch } from "../redux/store";

export const useAppDispatch = () => useDispatch<AppDispatch>();

export const useAppSelector: TypedUseSelectorHook<RootState> = useSelector;

主减速器文件应该有这样的样子：

import { configureStore } from "@reduxjs/toolkit";

import userleSlice from "./slice/userSlice";

export const store = configureStore({
  reducer: {
    user: userSlice,
  },
});

export type RootState = ReturnType<typeof store.getState>;
export type AppDispatch = typeof store.dispatch;

【讨论】：