Javascript Redux操作分派不工作
当用户提交表单时,我试图发送一个操作。假设我有一个submit按钮,它在表单上触发一个Javascript Redux操作分派不工作,javascript,reactjs,redux,redux-thunk,Javascript,Reactjs,Redux,Redux Thunk,当用户提交表单时,我试图发送一个操作。假设我有一个submit按钮,它在表单上触发一个onSubmit事件(并最终在处理表单请求时显示一个微调器图标,但此时,submit按钮只显示一个true或false值,表示是否显示微调器) LoginPage.js import React from 'react'; import { Link } from 'react-router-dom'; export class LoginPage extends React.Component { co
onSubmit
事件(并最终在处理表单请求时显示一个微调器图标,但此时,submit按钮只显示一个true
或false
值,表示是否显示微调器)
LoginPage.js
import React from 'react';
import { Link } from 'react-router-dom';
export class LoginPage extends React.Component {
constructor(props) {
super(props);
this.handleLogin = this.handleLogin.bind(this);
}
handleLogin(e) {
e.preventDefault();
let email = document.getElementById('userEmail').value;
let password = document.getElementById('userPassword').value;
this.props.loginHandler(email, password);
}
render() {
return (
<form onSubmit={ this.handleLogin }>
<input type="submit" value={ this.props.requestingLogin } />
</form>
);
}
}
export default LoginPage;
import React from 'react';
import { connect } from 'react-redux';
import LoginPage from '../../components/login/LoginPage';
import { loginUser } from '../../actions';
export class LoginPageContainer extends React.Component {
constructor(props) {
super(props);
}
render() {
return (
<LoginPage requestingLogin={ this.props.requestingLogin } loginHandler={ this.props.loginUser } />
);
}
}
const mapStateToProps = state => {
const { loginUserReducer } = state;
return {
requestingLogin: loginUserReducer.isRequestingLogin,
};
};
const mapDispatchToProps = dispatch => {
return {
loginUser: (email, password) => {
dispatch(loginUser(email, password));
}
}
};
export default connect(mapStateToProps, mapDispatchToProps)(LoginPageContainer);
减速机中的index.js/
export const REQUEST_LOGIN = 'REQUEST_LOGIN';
function requestLogin() {
return {
type: REQUEST_LOGIN,
};
};
export const loginUser = (email, password) => {
return dispatch => {
// this works because when the button is clicked,
// I can successfully console log in here.
dispatch(requestLogin); // THIS DISPATCH IS NOT WORKING
// API call here...
}
};
import { combineReducers } from 'redux';
import { REQUEST_LOGIN } from '../actions';
const initialLoginState = {
isRequestingLogin: false,
};
function loginUserReducer(state = initialLoginState, action) {
switch(action.type) {
case REQUEST_LOGIN:
return Object.assign({}, state, { isRequestingLogin: true });
default:
console.log('returned from default');
return state;
}
}
const allReducers = combineReducers({
loginUserReducer,
});
export default allReducers;
奇怪的是,我在dispatch()
内部logiuser()
之后调用的API可以工作,但是dispatch()
不能工作
我在网上看过很多教程,我的代码与我所看到的相匹配,但由于某些原因,我无法理解为什么调度操作不起作用。非常感谢您的帮助。问题在于:
const mapDispatchToProps = dispatch => {
return {
loginUser: (email, password) => {
dispatch(loginUser(email, password)); [DISPATCH ACTION]
}
}
};
因此,loginUser是一个接收电子邮件、密码和呼叫分派的函数(loginUser(电子邮件、密码))
但是loginUser(电子邮件、密码)不返回操作,而是返回函数
export const loginUser = (email, password) => {
return dispatch => {
// this works because when the button is clicked,
// I can successfully console log in here.
dispatch(requestLogin); // THIS DISPATCH IS NOT WORKING
// API call here...
}
};
因此,行[DISPATCH ACTION]
不会分派操作,而是分派函数
要使其正确,可以进行如下更改:
const mapDispatchToProps = dispatch => {
return {
loginUser: (email, password) => {
loginUser(email, password)(dispatch);
}
}
};
因此,loginUser返回一个函数,您使用dispatch作为参数调用它。但它看起来并不漂亮。如何正确地做
export const loginUser = dispatch => {
return (email, password) => {
// this works because when the button is clicked,
// I can successfully console log in here.
dispatch(requestLogin()); // THIS DISPATCH IS NOT WORKING
// API call here...
}
};
在mapDispatchToProps中:
const mapDispatchToProps = dispatch => {
return {
loginUser: loginUser(dispatch)
}
};
单击
submit
后是否重新加载页面?否,我有e.preventDefault()
在handleLogin()
方法中,我忘了把它与问题放在一起,您所要做的就是更改调度(requestLogin)代码>发送到调度(requestLogin())
并可能会将所需数据传递给action。@Panther这使它工作了!谢谢!你能创造一个答案吗?我也有同样的问题。有什么解决方案的建议吗?我试过了,但仍然不起作用,没有错误,但与以前的行为完全相同(API正在通过,但调度不起作用)是的,我忘了。它现在起作用了吗?我也有同样的问题,但不工作