Redux store does not have a valid reducer (combineReducer error)-CodePudding

First of all The directory structure is as follows

├─redux
│  │  store.js
│  │
│  └─slices
│          userSlice.js

store.js

import { configureStore, combineReducers } from "@reduxjs/toolkit";
import userSlice from "./slices/userSlice";

const rootReducer = combineReducers({
  userSlice,
});

const store = configureStore({
  reducer: rootReducer,
});

export default store;

userSlice.js

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

const initialState = {
  loginState: false,
  accessToken: "",
  userId: "",
};

const userSlice = createSlice({
  name: "userReducer",
  initialState,
  reducers: {
    setLogin: (state, action) => {
      state.loginState = true;
      state.accessToken = action.payload;
    },
  },
});

export const { setLogin } = userSlice.actions;
export default userSlice;

Each code is as follows

I need a few more reducers, so I used a combineReducer and, I connected the reducer through configureStore, but the following error continues to occur

Store does not have a valid reducer. Make sure the argument passed to combineReducers is an object whose values are reducers.

I don't know which one is the problem.

CodePudding user response：

Because you are passing a slice to the combineReducers(...). And slice !== reducer.

In your userSlice.js, you may want to change the last line to:

// export default userSlice;
export default userSlice.reducer;

You can take a look at the docs: https://redux-toolkit.js.org/api/createSlice

The generated reducer function is suitable for passing to the Redux combineReducers function as a "slice reducer".