Javascript 使用ReactJs映射获取的对象时出错 问题
我想从contentflow获取文章,但这是我遇到的错误Javascript 使用ReactJs映射获取的对象时出错 问题,javascript,reactjs,contentful,Javascript,Reactjs,Contentful,我想从contentflow获取文章,但这是我遇到的错误 TypeError: Cannot read property 'id' of undefined (anonymous function) E:/Project-VidM/client/src/components/Blog/index.js:21 18 | 19 | const Articles = article.map((entry) => { 20 | return( > 21 |
TypeError: Cannot read property 'id' of undefined
(anonymous function)
E:/Project-VidM/client/src/components/Blog/index.js:21
18 |
19 | const Articles = article.map((entry) => {
20 | return(
> 21 | <div className="entry" key={entry.sys.id}>
| ^ 22 | <h1>{entry.fields.title}</h1>
23 | <img src={entry.fields.featuredImage.sys} />
24 | {entry.fields.body.data}
View compiled
TypeError:无法读取未定义的属性“id”
(匿名函数)
E:/Project VidM/client/src/components/Blog/index.js:21
18 |
19 | const Articles=article.map((条目)=>{
20 |返回(
> 21 |
|^22{entry.fields.title}
23 |
24 |{entry.fields.body.data}
视图编译
这是我的代码
import React,{useState,useffect}来自“React”
将*从“contentful”导入为contentful;
常量BlogComponent=()=>{
const[article,setArticle]=useState([]);
const client=contentful.createClient({
空格:“xxxxxxxx”,
accessToken:'xxxxxxxxxxxxxxxxxxxx'
});
useffect(()=>{
client.getEntries()
。然后((res)=>{
固定物品([res.items]);
})
}, [])
const Articles=article.map((条目)=>{
返回(
{entry.fields.title}
{entry.fields.body.data}
)
})
返回(
{条款}
)
}
导出默认博客组件
当我在res.items
上执行console.log时,我得到以下输出:
如何映射特定字段?在console.log
res.items
中是一个数组,您将它放入另一个数组中
它应该是
setArticle(res.items)
而不是setArticle([res.items])
谢谢,但这样做会给我带来以下错误:```对象作为react子对象无效(找到:具有键的对象{})。如果要呈现子项集合,请改用数组。`` entry.fields.body.data中的内容是什么?看起来它是一个对象,而不是字符串或数字@SubhankarChowdhury
import React, { useState, useEffect} from 'react'
import * as contentful from 'contentful';
const BlogComponent = () => {
const [article, setArticle] = useState([]);
const client = contentful.createClient({
space: 'xxxxxxxx' ,
accessToken: 'xxxxxxxxxxxxxxxxxxxxxxxx'
});
useEffect(() => {
client.getEntries()
.then((res) => {
setArticle([res.items]);
})
}, [])
const Articles = article.map((entry) => {
return(
<div className="entry" key={entry.sys.id}>
<h1>{entry.fields.title}</h1>
<img src={entry.fields.featuredImage} />
{entry.fields.body.data}
</div>
)
})
return (
<div>
{Articles}
</div>
)
}
export default BlogComponent