![184Z]( "184Z")
本文介绍了对象作为 React 子对象无效.如果您打算渲染一组子项，请改用数组的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我正在设置一个带有 Rails 后端的 React 应用程序.我收到错误消息对象作为 React 子对象无效(找到:带有键 {id, name, info, created_at, updated_at} 的对象).如果您打算渲染子项集合，请改用数组."
这是我的数据的样子:
[{身份证":1，"name": "主页","info": "这一点信息是从 Rails 加载的API.","created_at": "2018-09-18T16:39:22.184Z","updated_at": "2018-09-18T16:39:22.184Z"}]我的代码如下:
从'react'导入React；class Home 扩展 React.Component {构造函数(道具){超级(道具)；this.state = {错误:空，isLoaded: 假，家园:[]};}componentDidMount() {fetch('http://localhost:3000/api/homes').then(res => res.json()).然后((结果) =>{this.setState({isLoaded: 真,家:结果});},//错误处理程序(错误) =>{this.setState({isLoaded: 真,错误});})}使成为() {const { error, isLoaded, home } = this.state;如果(错误){返回 (<div className="col">错误:{error.message}
);} else if (!isLoaded) {返回 (<div className="col">正在加载...
);} 别的 {返回 (<div className="col"><h1>Mi Casa</h1><p>你们都是我的房子！</p><p>东西:{homes}</p>
);}}}导出默认首页；
我做错了什么?
解决方案
您的数据 homes 是一个数组，因此您必须使用 Array.prototype.map() 使其工作.
返回(<div className="col"><h1>Mi Casa</h1><p>这是我的房子，你们都是！</p>{homes.map(home => <div>{home.name}</div>)}
);
I am setting up a React app with a Rails backend. I am getting the error "Objects are not valid as a React child (found: object with keys {id, name, info, created_at, updated_at}). If you meant to render a collection of children, use an array instead."
This is what my data looks like:
[
{
"id": 1,
"name": "Home Page",
"info": "This little bit of info is being loaded from a Rails
API.",
"created_at": "2018-09-18T16:39:22.184Z",
"updated_at": "2018-09-18T16:39:22.184Z"
}
]
My code is as follows:
import React from 'react';
class Home extends React.Component {
constructor(props) {
super(props);
this.state = {
error: null,
isLoaded: false,
homes: []
};
}
componentDidMount() {
fetch('http://localhost:3000/api/homes')
.then(res => res.json())
.then(
(result) => {
this.setState({
isLoaded: true,
homes: result
});
},
// error handler
(error) => {
this.setState({
isLoaded: true,
error
});
}
)
}
render() {
const { error, isLoaded, homes } = this.state;
if (error) {
return (
<div className="col">
Error: {error.message}
</div>
);
} else if (!isLoaded) {
return (
<div className="col">
Loading...
</div>
);
} else {
return (
<div className="col">
<h1>Mi Casa</h1>
<p>This is my house y'all!</p>
<p>Stuff: {homes}</p>
</div>
);
}
}
}
export default Home;
What am I doing wrong?
解决方案
Your data homes is an array, so you would have to iterate over the array using Array.prototype.map() for it to work.
return (
<div className="col">
<h1>Mi Casa</h1>
<p>This is my house y'all!</p>
{homes.map(home => <div>{home.name}</div>)}
</div>
);
这篇关于对象作为 React 子对象无效.如果您打算渲染一组子项，请改用数组的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！