React Redux：Uncaught錯誤：期望減速器是一個函數

我想在我的app.js文件中集成減速器，但我不斷收到以下錯誤： React Redux：Uncaught錯誤：期望減速器是一個功能。代碼如下所示：React Redux：Uncaught錯誤：期望減速器是一個函數

的減速/ booksReducers.js文件

"use strict" 

export function booksReducers(state={ books: [] }, action) { 
    switch (action.type) { 

    case 'POST_BOOK': 
     // let books = state.books.concat(action.payload); 
     // return {books}; 
     return { books: [...state.books, ...action.payload] } 
     break; 

    default: 
     break; 
    } 
    return state; 
}

的減速/ index.js文件

"use strict" 

import { combineReducers } from 'redux'; 

// HERE IMPORT REDUCERS TO BE COMBINED 
import { booksReducers } from './booksReducers'; 

//HERE COMBINE THE REDUCERS 
export default combineReducers({ 
    books: booksReducers 
})

主要app.js文件：

import { createStore } from 'redux'; 

import { reducers } from './reducers/index'; 

const store = createStore(reducers); 

store.subscribe(() => { 
    console.log('current state is ', store.getState()); 
}); 

store.dispatch({ 
    type: 'POST_BOOK', 
    payload: [ 
    { 
    id: 1, 
    title: 'Book Title', 
    description: 'Book Description' 
    }, 
    { 
    id: 2, 
    title: 'Second Book Title', 
    description: 'Second Book Description' 
    }, 
] 
});

我不知道，我哪裏出錯了。有誰能讓我知道這裏有什麼問題嗎？

感謝

來源

2017-05-21 Ashy Ashcsi