要么将根组件包装在 <Provider> 中，要么显式传递“store"作为“Connect(CharacterList)"的道具 [英] Either wrap the root component in a <Provider>, or explicitly pass "store" as a prop to "Connect(CharacterList)

问题描述

我正在尝试测试我的 Reactsupersquadapp"并收到以下错误.

未捕获的错误:无法在Connect(CharacterList)"的上下文或道具中找到store".要么将根组件包装在 a 中，要么将store"作为道具显式传递给Connect(CharacterList)".

characterlist.js

import React, { Component } from 'react';从'react-redux'导入{连接}；类 CharacterList 扩展组件 {使成为() {console.log('this.props', this.props);返回 (<div><h4>字符</h4>

)}}函数 mapStateToProps(state) {返回 {字符:state.characters}}导出默认连接(mapStateToProps，null)(CharacterList)；

app.js

import React, {Component} from 'react';从 './CharacterList' 导入 CharacterList；类 App 扩展组件 {使成为() {返回 (<div><h2>超级小队</h2><角色列表/>

)}}导出默认应用程序；

index.js

从'react'导入React；从 'react-dom' 导入 ReactDOM；从'./Components/App'导入应用程序；从'redux'导入{createStore}；从'react-redux'导入{提供者}；从'./reducers'导入rootReducers；import { addCharacterById } from './actions';const store = createStore(rootReducers);console.log(store.getState());store.subscribe(() => console.log('store',store.getState()))store.dispatch(addCharacterById(3));ReactDOM.render(<提供者><应用程序/></提供者>,document.getElementById('root'))

character.js(在reducers文件夹中)

import characters_json from '../Data/characters.json';从 '../actions' 导入 { ADD_CHARACTER };功能字符(状态 = characters_json，动作){开关(动作.类型){案例ADD_CHARACTER:let characters = state.filter(item => item.id !== action.id);返回字符；默认:返回状态；}}导出默认字符；

heroes.js(reducers 文件夹)

import { ADD_CHARACTER } from '../actions';从'./helper'导入{createCharacter}；功能英雄(状态= []，动作){开关(动作.类型){案例ADD_CHARACTER:让英雄 = [...state, createCharacter(action.id)];英雄归来；默认:返回状态；}}导出默认英雄；

helper.js(reducers 文件夹)

import characters_json from '../Data/characters.json';导出函数 createCharacter(id) {让 character = characters_json.find(c => c.id === id);返回字符；}

index.js(reducers 文件夹)

import { combineReducers } from 'redux';从'./characters_reducer'导入字符；从'./heroes_reducer'导入英雄；const rootReducer = combineReducers({人物，英雄})导出默认的 rootReducer；

index.js(动作文件夹)

export const ADD_CHARACTER = 'ADD_CHARACTER';导出函数 addCharacterById(id) {常量动作 = {类型:ADD_CHARACTER，ID}返回动作；}

组件出现上述错误:

在 Connect(CharacterList) 中(在 App.js:9)

在 div 中(在 App.js:7 处)

在应用程序中(在 index.js:19)

在提供者中(在 index.js:18)

请帮帮我...?

解决方案

必须将 store 实例传递给 Provider...

ReactDOM.render(<提供者商店={商店}><应用程序/></提供者>, document.getElementById('root'))

I am trying to test my React "supersquadapp" and getting the following error.

Uncaught Error: Could not find "store" in either the context or props of "Connect(CharacterList)". Either wrap the root component in a , or explicitly pass "store" as a prop to "Connect(CharacterList)".

characterlist.js

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

class CharacterList extends Component {
    render() {
        console.log('this.props', this.props);
        return (
            <div>
                <h4>characters</h4>
            </div>
        )
    }

}
function mapStateToProps(state) {
    return {
        characters: state.characters
    }
}

export default connect(mapStateToProps, null)(CharacterList);

app.js

import React, {Component} from 'react';
import CharacterList from './CharacterList';

class App extends Component {
    render() {
        return (
            <div>
                <h2>SUPER SQUAD</h2>
                <CharacterList />
            </div>
        )
    }
} 
export default App;

index.js

import React from 'react';
import ReactDOM from 'react-dom';
import App from './Components/App';

import { createStore } from 'redux';
import { Provider } from 'react-redux';

import rootReducers from './reducers';
import { addCharacterById } from './actions';


const store = createStore(rootReducers);
console.log(store.getState());
store.subscribe(() => console.log('store',store.getState()))
store.dispatch(addCharacterById(3));

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

character.js(in reducers folder)

import characters_json from '../Data/characters.json';
import { ADD_CHARACTER } from '../actions';

function characters(state = characters_json, action) {
    switch(action.type) {
        case ADD_CHARACTER:
        let characters = state.filter(item => item.id !== action.id);
        return characters;
        default:
            return state;
    }
}
export default characters;

heroes.js(reducers folder)

import { ADD_CHARACTER } from '../actions';
import {createCharacter} from './helper';

function heroes(state = [], action) {
    switch(action.type) {
        case ADD_CHARACTER:
        let heroes = [...state, createCharacter(action.id)];
        return heroes;
        default:
        return state;
    }
}
export default heroes;

helper.js(reducers folder)

import characters_json from '../Data/characters.json';

export function createCharacter(id) {
    let character = characters_json.find(c => c.id === id);
    return character;
}

index.js(reducers folder)

import { combineReducers } from 'redux';
import characters from './characters_reducer';
import heroes from './heroes_reducer';


const rootReducer = combineReducers({
    characters,
    heroes
})
export default rootReducer;

index.js(action folder)

export const ADD_CHARACTER = 'ADD_CHARACTER';

export function addCharacterById(id) {
    const action = {
        type:ADD_CHARACTER,
        id
    }
    return action;
}

The above error occurred in the component:

in Connect(CharacterList) (at App.js:9)

in div (at App.js:7)

in App (at index.js:19)

in Provider (at index.js:18)

please help me...?

解决方案

You must pass the store instance to Provider...

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

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