错误:操作必须是普通对象.使用自定义中间件执行异步操作.反应冗余错误

Question

index.js

import store from "./store";
import { createStore } from 'redux';
import reducers from './reducers';
import { Provider } from 'react-redux';

console.log('init state', store.getState());
ReactDOM.render(    
<Provider store={ store }>
<App />
</Provider>, 
document.getElementById('root')
);
registerServiceWorker();

操作.js

import * as types from "./types";
import axios from 'axios';
import { incrementProgress, decrementProgress } from "./progress";

const userLogin = username => ({
type: types.AUTH_LOGIN,
username,
});
const userLogout = () => ({
type: types.AUTH_LOGOUT,
});
const fakeLoginRequest = (username, password) => {
alert(username, password)
}
export const doLogin = username => {
alert(username)
};
export const doLogout = () => dispatch => {
dispatch(userLogout());
};

LoginForm.jsx - 哑组件

class LoginForm extends React.Component {
constructor(props) {
super(props);
this.state = {
username: '',
password: '',
};
this.handleClick = this.handleClick.bind(this);
}
fakeLogin = e => {
const { username } = this.state;
e.preventDefault();
if (!username) {
return alert("Provide a username.");
}
this.props.doLogin(username);
this.setState({ username: "" });
};
render() {
return (
<div>
<MuiThemeProvider>
<div>
<TextField
hintText="Enter your Username"
floatingLabelText="Username"
onChange = {(event,newValue) => this.setState({username:newValue})}
/>
<br/>
<TextField
type="password"
hintText="Enter your Password"
floatingLabelText="Password"
onChange = {(event,newValue) => this.setState({password:newValue})}
/>
<br/>
<RaisedButton label="Submit" primary={true} style={style} onClick={this.fakeLogin}/>
</div>
</MuiThemeProvider>
</div>
);
}
}   
export default LoginForm;

LoginPage.jsx - Wise Component

const LoginPage = ({ auth, doLogin, doLogout }) => (
<div>
<NavBar/>
<div className="row">
<div style={{display: 'flex', justifyContent: 'center'}} className="col-md-4 col-md-offset-4">
<LoginForm doLogin={doLogin} doLogout={doLogout} auth={auth} />
</div>
</div>
</div>
);
const mapStateToProps = state => ({
auth: state.auth,
});
export default connect(mapStateToProps, { doLogin, doLogout })(LoginPage);

我是 react-redux 的新手，我正在尝试创建一个识别用户当前登录状态的流程。我试图使用上面的代码是，我想确保username和password正确通过并提醒它们。

但是，我收到错误

Error: Actions must be plain objects. Use custom middleware for async actions. React-redux error.

在LoginForm.jsx的this.props.doLogin(username);。似乎也与按钮的onClick有关。我不明白，因为我调用的函数不是异步的。

我做错了什么？

Answer 1

就像错误所说的那样，你的动作创建者必须返回一个对象。

export const doLogin = username => {
console.log('READ THE DOCS. IT IS VERY HELPFUL TO READ THE DOCS.');
console.log(username);
return {
type: 'YOUR_ACTION_TYPE',
payload: { whatever: 'you', want: 'it', to: 'be' }
};
};