Redux路由器 - "未定义调度"

Question

我有一个简单的组件,当用户加载页面时调用一个动作,并且在该动作中,我试图调度另一个动作来将loggedIn商店的状态设置为true或false:

import React, { Component } from 'react'
import { Link, browserHistory } from 'react-router'
import $ from 'jquery'

class Login extends Component {

  constructor(props) {
    super(props)
  }
  componentDidMount() {
    this.props.actions.guestLoginRequest()
  }
  render() {
    return (
      <div>
        <div classNameName="container">
          <div className="row">
            We are signing you in as a guest
          </div>
        </div>
      </div>
    )
  }
}

export default Login

我可以在guestLoginRequest调用操作时获取登录信息,但是当我尝试在其中调度另一个操作时,没有任何反应:

guestLoginRequest: function(){
    var ref = new Firebase("https://penguinradio.firebaseio.com");
    ref.authAnonymously(function(error, authData) {
      if (error) {
        console.log("Login Failed!", error);
      } else {
        console.log("Authenticated successfully with payload:", authData);
        return dispatch => {
          dispatch(actions.setLoginStatus(true, authData))
          console.log("dispatched");
        };
      }
    });
  }

我Uncaught ReferenceError: dispatch is not defined删除return dispatch => { }语句时出错.在我的商店,我使用的是redux-thunk,所以我可以在内部调度:

// Store.js
import { applyMiddleware, compose, createStore } from 'redux'
import rootReducer from './reducers'
import logger from 'redux-logger'
import thunk from 'redux-thunk'

let finalCreateStore = compose(
  applyMiddleware(thunk, logger())
)(createStore)


export default function configureStore(initialState = { loggedIn: false }) {
  return finalCreateStore(rootReducer, initialState)
}

我也将调度映射到app.js中的props:

function mapStateToProps(state) {
  return state
}
function mapDispatchToProps(dispatch) {
  return {
      actions: bindActionCreators(actions, dispatch)
  }
}

export default connect(mapStateToProps, mapDispatchToProps)(App)

为了防止它有用,这里是我的client.js和reducer文件:

// client.js
import React from 'react'
import { render } from 'react-dom'
import App from '../components/App'
import configureStore from '../redux/store'
import { Provider } from 'react-redux'


let initialState = {
  loggedIn: false
}

let store = configureStore(initialState)

render(
  <Provider store={store}>
    <App />
  </Provider>,
  document.getElementById('app')
)
// Reducer.js
import { combineReducers } from 'redux'

let LoginStatusReducer = function reducer(loggedIn = false, action) {
  switch (action.type) {
    case 'UPDATE_LOGIN_STATUS':
      return loggedIn = action.boolean
    default:
      return loggedIn
  }
}
export default LoginStatusReducer

const rootReducer = combineReducers({
  loggedIn: LoginStatusReducer
})

export default rootReducer

我的调度功能不起作用的任何想法？我很困惑,因为我确实在我的商店中设置了redux-thunk,而且当我打电话时,我正在使用与文档类似的代码return dispatch => { }.有什么我想念的吗？提前感谢您的任何建议!

Answer 1

你需要你的动作来返回一个函数来利用thunk中间件,然后redux会将调度程序注入其中.您将调度程序调用与实现细节混合在一起.以下代码段修复了这两个缺陷.

guestLoginRequest: function(){
  return function (dispatch) {
    var ref = new Firebase("https://penguinradio.firebaseio.com");
    ref.authAnonymously(function(error, authData) {
      if (error) {
        console.log("Login Failed!", error);
      } else {
        console.log("Authenticated successfully with payload:", authData);
        dispatch(actions.setLoginStatus(true, authData))
        console.log("dispatched");
      }
    });
  }
}

此外,您需要在Login课堂上正确派遣您的行动.

dispatch(this.props.actions.guestLoginRequest())

您的操作调用始终通过调用完成dispatch.流程应该是这样的:

React component --> dispatch ---> API call (thunk middleware) --> dispatch ---> reducer