Reactjs 使用Redux时,操作必须是普通对象
我犯了一个错误,就像 动作必须是普通对象。将自定义中间件用于异步操作 使用react redux时。我正在开发一个具有登录功能的应用程序。这是我的密码 组件Reactjs 使用Redux时,操作必须是普通对象,reactjs,redux,react-redux,Reactjs,Redux,React Redux,我犯了一个错误,就像 动作必须是普通对象。将自定义中间件用于异步操作 使用react redux时。我正在开发一个具有登录功能的应用程序。这是我的密码 组件 import React, { Component } from 'react'; import PropTypes from 'prop-types'; import {connect} from 'react-redux'; import {bindActionCreators} from 'redux'; import Paper f
import React, { Component } from 'react';
import PropTypes from 'prop-types';
import {connect} from 'react-redux';
import {bindActionCreators} from 'redux';
import Paper from 'material-ui/Paper';
import TextField from 'material-ui/TextField';
import RaisedButton from 'material-ui/RaisedButton';
import * as AuthActions from '../../actions/AuthAction';
import {blueGrey50,lightBlue500} from 'material-ui/styles/colors';
const style = {
height: 350,
width: 370,
marginLeft: 80,
marginRight: 380,
marginTop: 80,
marginBottom: 50,
textAlign: 'center',
display: 'inline-block',
backgroundColor: blueGrey50,
paddingTop: 20,
};
const style1 = {
color: lightBlue500
};
const style2 = {
margin: 12,
};
class Login extends Component {
constructor(props) {
super(props);
this.state = {
email: '',
password: ''
};
}
singin=()=>{
console.log('signing in');
this.props.SigninActions.signIn({email:this.state.email,password:this.state.password});
this.setState({email: '',password: '',loading:true});
console.log('done sending to actions');
}
render() {
return (
<div style={{backgroundImage: "url(" + "https://addmeskype.files.wordpress.com/2015/09/d62cb-teenagers-offlinle-online.jpg" + ")",
width:1301, height:654}}>
<Paper style={style} zDepth={2}>
<h1 style={style1}><center>Sign In</center></h1>
<TextField hintText="Email" floatingLabelText="Email" onChange={e=>{this.setState({email:e.target.value})}}/>
<TextField hintText="Password" floatingLabelText="Password" type="password" onChange={p=>{this.setState({password:p.target.value})}}/>
<br/><br/>
<RaisedButton label="Sign In" primary={true} style={style2} onTouchTap={this.singin}/>
</Paper>
{
(this.props.isError)? <span>Email or Password combination is wrong!</span> : <div>No errors</div>
}
</div>
);
}
}
Login.PropTypes = {
isError: PropTypes.bool,
SigninActions: PropTypes.object
}
const mapStateToProps = (state,ownProps) => {
return {
isError: state.isError
}
}
const mapDispatchToProps = (dispatch) => {
return {
SigninActions:bindActionCreators(AuthActions,dispatch)
};
}
export default connect(mapStateToProps,mapDispatchToProps)(Login);
减速器
import { SIGN_UP_REQUEST, SIGN_IN_REQUEST} from '../constants/user';
const initialState = {
loading: false,
isError: false
};
export default function User(state = initialState, action) {
switch (action.type) {
case SIGN_UP_REQUEST:
return Object.assign({},state,{isError:action.data.isError});
case SIGN_IN_REQUEST:
return Object.assign({},state,{isError:action.data.isError});
default:
return state;
}
}
import { combineReducers } from 'redux';
import ChatReducer from './ChatReducer';
import UserReducer from './UserReducer';
export default combineReducers({
chat: ChatReducer,
user: UserReducer
})
Rootreducer
import { SIGN_UP_REQUEST, SIGN_IN_REQUEST} from '../constants/user';
const initialState = {
loading: false,
isError: false
};
export default function User(state = initialState, action) {
switch (action.type) {
case SIGN_UP_REQUEST:
return Object.assign({},state,{isError:action.data.isError});
case SIGN_IN_REQUEST:
return Object.assign({},state,{isError:action.data.isError});
default:
return state;
}
}
import { combineReducers } from 'redux';
import ChatReducer from './ChatReducer';
import UserReducer from './UserReducer';
export default combineReducers({
chat: ChatReducer,
user: UserReducer
})
商店
import { createStore, applyMiddleware } from 'redux';
import thunk from 'redux-thunk';
import RootReducer from '../reducers/RootReducer';
export default() => {
return createStore(RootReducer,
window.__REDUX_DEVTOOLS_EXTENSION__ && window.__REDUX_DEVTOOLS_EXTENSION__());
}
浏览器将错误显示为
如何克服这个问题?。我对redux很陌生。香草redux只处理简单的对象操作,例如
{type:SOME_ACTION,…parameters}
同步返回
您需要研究如何使用中间件,比如您是否希望从动作创建者(或者,在本例中,处理异步动作)返回承诺或除普通对象以外的任何东西
见此:
编辑:
export const getUserDetails = (email) => {
axios.put('http://localhost:3030/user', user) .then((data) => {
return {
type: UPDATE_USER_DETAILS,
user:data.data
};
});
});
问题有两个方面:
第一名:
export const getUserDetails = (email) => {
axios.put('http://localhost:3030/user', user) .then((data) => {
return {
type: UPDATE_USER_DETAILS,
user:data.data
};
});
});
您返回的是承诺内的操作(axios.put
),但您没有返回承诺-javascript无法按照您的预期工作<代码>返回,在这种情况下,仅限于最近的父范围;在这种情况下,承诺机构。根据您当前拥有的内容,getUserDetails
操作创建者的返回类型是undefined
// this is still technically *wrong*, see below
export const getUserDetails = (email) => {
// notice the return on the next line
return axios.put('http://localhost:3030/user', user) .then((data) => {
return {
type: UPDATE_USER_DETAILS,
user:data.data
};
});
});
返回一个仍然不能真正解决问题的承诺
秒:
在使用redux thunk时,您可以将操作包装在一个函数中,如
export const getUserDetails = (email) => {
return (dispatch) => {
return axios.put('http://localhost:3030/user', user) .then((data) => {
// this is where the action is fired
dispatch({
type: UPDATE_USER_DETAILS,
user:data.data
});
// if you want to access the result of this API call, you can return here
// the returned promise will resolve to whatever you return here
return data;
});
}
});
当您绑定action creator时,它将“展开”creator,同时保留方法签名-您可以像平常一样使用它
this.props.getUserDetails("email@domain.com").then((data) => {
// optional resolved promise
})
我使用了redux thunk,但我仍然得到相同的错误。我是否需要分派操作中的函数?我正在使用bindActionCreators。不过,您需要从您的操作返回thunk
。我会更新我的评论。我只是注意到你是从一个承诺的内部尝试,而没有实际返回承诺…我现在很困惑。你能用一些代码解释一下吗。我已经尝试了所有的方法,但是我不知道如何解决这个问题。谢谢,它成功了,我不得不使用redux的“撰写”,因为我使用的是一些中间件,而不是redux thunk