[英]React component cannot map and render data in an array from an API
我正在使用react,redux,axios和redux-thunk處理異步。
我有一種解決方案將變得顯而易見的感覺,但是由於某種原因,我無法映射一組用戶(從本地express / node api中檢索)並渲染每個用戶。 用戶的信息將被登錄到控制台,但是...
<p>NO USERS FOUND</p>
...組件將呈現在屏幕上。
這是我的倉庫: https : //github.com/tedjames/reduxTest
這是我的組件的外觀:
import React, { Component } from 'react';
import { connect } from 'react-redux'
import { getUsers } from '../redux/actions'
class App extends Component {
componentWillMount() {
console.log(this.props);
this.props.getUsers();
}
render() {
if (this.props.users[1]) {
this.props.users.map((user) => {
console.log("USER FOUND!");
console.log(user.email);
return <p key={user.id}>USER FOUND: {user.email}</p>
});
} else {
return <p>NO USERS FOUND</p>
}
}
}
const mapStateToProps = state => {
return {
users: state.admin.users
};
};
export default connect(mapStateToProps, { getUsers })(App);
這是我使用axios來獲取用戶的操作:
import axios from 'axios'
import { GET_USERS } from './types'
export const getUsers = () => {
return (dispatch) => {
axios.get('http://localhost:3090/users')
.then(res => {
console.log("<-- // DATA RECEIVED FROM SERVER // --> ");
console.log(res);
dispatch({ type: GET_USERS, payload: res.data })
})
.catch(({ response }) => {
console.log("// ERROR RECEIVED FROM SERVER //");
console.log(response);
});
}
};
您必須在render
內部返回數組(並將其包裝在一些標簽中):
return (
<div>{ this.props.users.map((user) => {
console.log("USER FOUND!");
console.log(user.email);
return <p key={user.id}>USER FOUND: {user.email}</p> }
</div>
);
聲明:本站的技術帖子網頁,遵循CC BY-SA 4.0協議,如果您需要轉載,請注明本站網址或者原文地址。任何問題請咨詢:yoyou2525@163.com.