我正尝试在页面加载时更新我的DOM。基本上它应该显示渲染用户的数据。但是当我通过记录器检查时没有发生,我发现这些值不存储在我的this.props值中。但行动被触发了,减速器已经完成了它的任务。所以我担心为什么我的mapStatToProps不是更新? 这里是我的容器文件状态在还原器减少后未更新
import User from "../components/User"
import React from "react"
import {connect} from "react-redux"
import {fetchUsers} from "../action/UserAction"
import PropTypes from 'prop-types'
const UserContainer =React.createClass ({
componentWillMount(){
console.log("componenet will mount")
this.props.dispatch(fetchUsers());
},
render(){
console.log(this.props);
return(
<User
name={this.props.users[0].name}
role={this.props.users[0].role}>
</User>
)
}
})
UserContainer.propTypes = {
users:PropTypes.arrayOf(PropTypes.shape({
name:PropTypes.string.isRequired,
role:PropTypes.string.isRequired
})).isRequired
}
const mapStateToProps= state => {
console.log("state",state)
return{
users:state.users
}
}
export default connect(
mapStateToProps
)(UserContainer)
我减速器文件
export default function reducer(state={users :[]},action){
// console.log("inside reducer")
switch(action.type){
case "FETCH_USERS":{
const newState={...state,users:action.payload}
console.log("newSrate",newState)
return newState
}
default: {
return {
...state
}
}
}
}
和我的操作文件
export function fetchUsers(){
console.log("fetch users")
return {
type:"FETCH_USERS",
payload:"[{'name':'x','roles':'developer'},{'name':'y','role':'god'}]"
}
}
我收到错误,如name is not defined for users
,因为当我检查this.props用户是空的array
你的初始状态是什么? – JoseAPL
@JoseAPL'state = {users:[]}' – robertklep
我没有定义getIntialState方法,如果你询问用户那么它显示为空数组 – LowCool