javascript - 类型错误 : Cannot read property 'dispatch' of null

Question

在尝试将我的 firestore 连接到 reducer 后，我刚刚收到此错误，因为我注意到 cnt 从我的 firestore 获取任何数据，所以问题出在 index.js 文件，因为它发生在我在 v2 到 v3 之间进行迁移之后，并且当错误开始时，如果你能帮我找出问题，请

import React from 'react';
import ReactDOM from 'react-dom';
import './index.css';
import App from './App';
import * as serviceWorker from './serviceWorker';
import {createStore, applyMiddleware, compose } from 'redux'
import rootreducer from './store/reducers/rootreducer'
import { Provider } from 'react-redux'
import thunk from 'redux-thunk'
import { createFirestoreInstance, getFirestore, reduxFirestore } from 'redux-firestore'
import { ReactReduxFirebaseProvider, getFirebase} from 'react-redux-firebase'
import fbconfig from './config/fbconfig'
import firebase from 'firebase/app'
const store = createStore(
  rootreducer,
  compose(
      applyMiddleware(thunk.withExtraArgument({ getFirestore, getFirebase })),
      reduxFirestore(firebase, fbconfig)
  )
);

const rrfProps = {
  firebase,
  config: fbconfig,
  dispatch: store.dispatch,
  createFirestoreInstance
};

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

serviceWorker.unregister();

这是我的 仪表板.js 导出时添加撰写时发生错误

export default compose(
    connect(mapStateToProps),
    firestoreConnect([
        {collection: 'projects'}
    ])
)(Dashboard)

Answer 1

我刚刚在 的帮助下修复了它Kevin Moe Myint Myat 通过把 <App/>里面ReactReduxFirebaseProvider如下所示

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

serviceWorker.unregister();