文件树缩减器中的状态未定义

state undefined in file tree reducer

我只想 return 来自我的减速器的对象数组,但是 useSelect() return 未定义

reducer/directories/index.js:

export * from './reportDir'

reducer/directories/reportDir.js:

const reportDir = [
{
    type: 'cat',
    name: 'گزارش ها',
    childrens: [
        {
            type: 'folder',
            name: 'گزارش های اپراتور',
            childrens: [
                {type: 'file', name: 'گزارش شنود', route: '/listen', id: 1}
            ]
        },
        {
            type: 'folder',
            name: 'گزارش مالی',
            childrens: [
                {type: 'file', name: 'مالی', id: 2}
            ]
        }
    ]
}
 ]

 const reportDirReducer = (state = reportDir) => {
  return state
 }

 export default reportDirReducer

reducer/index.js:

import { combineReducers } from 'redux'
import newTabReducer from './newTabReducer' 
import fileReducer from './fileReducer'
import tableReducer from './tableReducer'
import { authentication } from './authenticationReducer';
import { alert } from './alertReducer';
import { listen } from './reportOpReducer';
import { reportDirReducer } from './directories';

export default combineReducers({
 newTabReducer, fileReducer, authentication, 
    tableReducer, alert, listen, reportDirReducer
})

这是我为我的 React 应用程序创建的一个简单目录路径,我不知道为什么我从 reportDirReducer 得到 undefined

您的 reducer/index.js 文件正在 './directories' 中寻找名称为 reportDirReducer 的命名导出。该变量不存在,因为 reducer 是默认导出,而不是命名导出。使用 export *.

时,它基本上会“丢失”

在你的reducer/directories/index.js中,改用这个:

export { default as reportDirReducer } from './reportDir';

我们从 './reportDir' 导入默认导出,这是减速器。然后我们将其重新导出为命名导出 reportDirReducer.


另一种解决方案是保持 reducer/directories/index.js 文件与现在相同,并将 reducer/directories/reportDir.js 更改为使用命名导出而不是默认导出。

export const reportDirReducer = (state = reportDir) => {
  return state;
};