“找不到"商店“在上下文或道具中"我在尝试简单的 react-redux 代码时遇到此错误 [英] "Could not find "store" in either the context or props" I'm getting this error while trying simple react-redux code

问题描述

这是我的书单容器

import React, {Component} from 'react';从'react-redux'导入{连接}；类 BookList 扩展组件{渲染列表(){返回 this.props.books.map((book)=>{返回(<li key={book.title}>{book.title}</li>);});}使成为(){返回(<ul>{this.renderList()})}}函数 mapStateToProps(state){返回{书籍:state.books};}导出默认连接(mapStateToProps)(BookList)；

这是我的 app.js 文件

 import React from 'react';从反应"导入{组件}；从 '../containers/book-list' 导入 BookList；导出默认类 App 扩展组件{使成为(){返回(<div><div>React 简单应用</div><书单/>

);}}

这是我在 Reducers 文件夹中的 index.js 文件

从'redux'导入{combineReducers}；从 './reducer_books' 导入 BooksReducer；const rootReducer = combineReducers({书籍:BooksReducer});导出默认的 rootReducer；

这是我的主要 index.js 文件，它在

上呈现应用程序组件

从'react'导入React；从 'react-dom' 导入 ReactDOM；从'./components/app'导入应用程序；导入'./index.css';ReactDOM.render(<应用程序/>,document.getElementById('root'));

这是我的书本减速器

导出默认函数(){返回 [{title: 'AAA1'},{title: 'BBB2'},{title: 'CCC3'},{title: 'DDD4'},]}

请告诉我我错在哪里.

解决方案

创建一个 store 并将您的组件封装在一个 Provider 中，例如

import {createStore} from 'redux';从'react-redux'导入{提供者}导入 RootReducer 表单 '/path/to/rootreducer';从反应"导入反应；从 'react-dom' 导入 ReactDOM；从'./components/app'导入应用程序；导入'./index.css';const store = createStore(RootReducer);ReactDOM.render(<提供者商店={商店}><应用程序/></提供者>,document.getElementById('root'));

This is my booklist container

import React, {Component} from 'react';
import { connect } from 'react-redux';


class BookList extends Component{
  renderList(){
    return this.props.books.map((book)=>{
      return(
        <li key={book.title}>{book.title}</li>
      );
    });
  }

  render(){
    return(
      <ul>
       {this.renderList()}
      </ul>
    )
  }
} 

function mapStateToProps(state){
  return{
    books : state.books
  };    
}

export default connect(mapStateToProps)(BookList); 

This is my app.js file

  import React from 'react';
  import { Component } from 'react';
  import BookList from '../containers/book-list';

  export default class App extends Component{
    render(){
      return(
        <div>
        <div>React simple App</div>
        <BookList/>
        </div>
      );
    }
  }

This is my index.js file in Reducers folder

import {combineReducers} from 'redux';
import BooksReducer from './reducer_books';

const rootReducer = combineReducers({
  books:BooksReducer
});

export default rootReducer;

This is my main index.js file which renders app component on

import React from 'react';
import ReactDOM from 'react-dom';
import App from './components/app';
import './index.css';

ReactDOM.render(
   <App />,
  document.getElementById('root')
);

This is my books reducer

export default function () {
  return [
    {title: 'AAA1'},
    {title: 'BBB2'},
    {title: 'CCC3'},
    {title: 'DDD4'},
  ]
}

Please tell me where I am wrong.

解决方案

Create a store and enclose your components within a Provider like

import {createStore} from 'redux';
import { Provider } from 'react-redux'
import RootReducer form '/path/to/rootreducer';
import React from 'react';
import ReactDOM from 'react-dom';
import App from './components/app';
import './index.css';
const store = createStore(RootReducer);

ReactDOM.render(
   <Provider store={store}>
       <App />
   </Provider>,
  document.getElementById('root')
);

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