Javascript 对象作为子对象无效,请渲染子对象集合,改用数组
这个类给了我错误 错误:对象作为React子对象无效(找到:具有键的对象 {{u id,name})。如果要渲染子对象集合,请使用 而不是数组。) 这里有什么问题吗?这里我传递movies对象并遍历map方法。如果是错误的,我怎么做?我在这里看到了一些类似的问题,但没有帮助我Javascript 对象作为子对象无效,请渲染子对象集合,改用数组,javascript,reactjs,Javascript,Reactjs,这个类给了我错误 错误:对象作为React子对象无效(找到:具有键的对象 {{u id,name})。如果要渲染子对象集合,请使用 而不是数组。) 这里有什么问题吗?这里我传递movies对象并遍历map方法。如果是错误的,我怎么做?我在这里看到了一些类似的问题,但没有帮助我 import React, { Component } from 'react'; class Movies extends Component { state = { movies: [
import React, { Component } from 'react';
class Movies extends Component {
state = {
movies: [
{
_id: "5b21ca3eeb7f6fbccd471815",
title: "Terminator",
genre: { _id: "5b21ca3eeb7f6fbccd471818", name: "Action" },
numberInStock: 6,
dailyRentalRate: 2.5,
publishDate: "2018-01-03T19:04:28.809Z",
liked: false
},
{
_id: "5b21ca3eeb7f6fbccd471816",
title: "Die Hard",
genre: { _id: "5b21ca3eeb7f6fbccd471818", name: "Action" },
numberInStock: 5,
dailyRentalRate: 2.5,
liked: true
},
{
_id: "5b21ca3eeb7f6fbccd471817",
title: "Get Out",
genre: { _id: "5b21ca3eeb7f6fbccd471820", name: "Thriller" },
numberInStock: 8,
dailyRentalRate: 3.5,
liked: true
},
{
_id: "5b21ca3eeb7f6fbccd471819",
title: "Trip to Italy",
genre: { _id: "5b21ca3eeb7f6fbccd471814", name: "Comedy" },
numberInStock: 7,
dailyRentalRate: 3.5,
liked: false
},
{
_id: "5b21ca3eeb7f6fbccd47181a",
title: "Airplane",
genre: { _id: "5b21ca3eeb7f6fbccd471814", name: "Comedy" },
numberInStock: 7,
dailyRentalRate: 3.5,
liked: true
},
{
_id: "5b21ca3eeb7f6fbccd47181b",
title: "Wedding Crashers",
genre: { _id: "5b21ca3eeb7f6fbccd471814", name: "Comedy" },
numberInStock: 7,
dailyRentalRate: 3.5,
liked: false
},
{
_id: "5b21ca3eeb7f6fbccd47181e",
title: "Gone Girl",
genre: { _id: "5b21ca3eeb7f6fbccd471820", name: "Thriller" },
numberInStock: 7,
dailyRentalRate: 4.5,
liked: false
},
{
_id: "5b21ca3eeb7f6fbccd47181f",
title: "The Sixth Sense",
genre: { _id: "5b21ca3eeb7f6fbccd471820", name: "Thriller" },
numberInStock: 4,
dailyRentalRate: 3.5,
liked: true
},
{
_id: "5b21ca3eeb7f6fbccd471821",
title: "The Avengers",
genre: { _id: "5b21ca3eeb7f6fbccd471818", name: "Action" },
numberInStock: 7,
dailyRentalRate: 3.5,
liked: false
}
]
}
handleDelete = (movie) => {
console.log("movie deleted")
};
render() {
return (
<React.Fragment>
<p>Showing 9 movies in the database</p>
<table className="table table-hover">
<thead>
<tr>
<th scope="col">Title</th>
<th scope="col">Genre</th>
<th scope="col">Stock</th>
<th scope="col">Rate</th>
<th scope="col">Action</th>
</tr>
</thead>
<tbody>
{this.state.movies.map(movie => (
<tr key={movie._id}>
<th>{movie.title}</th>
<td>{movie.genre}</td>
<td>{movie.numberInStock}</td>
<td>{movie.dailyRentalRate}</td>
<td><button onClick={() =>this.handleDelete(movie)} type="button" className="btn btn-danger">Delete</button></td>
</tr>
))}
</tbody>
</table>
</React.Fragment>
);
}
}
export default Movies;
import React,{Component}来自'React';
类扩展组件{
状态={
电影:[
{
_id:“5b21ca3eeb7f6fbccd471815”,
标题:“终结者”,
体裁:{u id:“5b21ca3eeb7f6fbccd471818”,名称:“动作”},
库存数量:6,
Dailrentalrate:2.5,
出版日期:“2018-01-03T19:04:28.809Z”,
喜欢:错
},
{
_id:“5b21ca3eeb7f6fbccd471816”,
标题:“死硬”,
体裁:{u id:“5b21ca3eeb7f6fbccd471818”,名称:“动作”},
库存数量:5,
Dailrentalrate:2.5,
喜欢:真的
},
{
_id:“5b21ca3eeb7f6fbccd471817”,
标题:“滚出去”,
类型:{u id:“5b21ca3eeb7f6fbccd471820”,名称:“Thriller”},
库存数量:8,
Dailrentalrate:3.5,
喜欢:真的
},
{
_id:“5b21ca3eeb7f6fbccd471819”,
标题:“意大利之旅”,
类型:{u id:“5b21ca3eeb7f6fbccd471814”,名称:“喜剧”},
库存数量:7,
Dailrentalrate:3.5,
喜欢:错
},
{
_id:“5b21ca3eeb7f6fbccd47181a”,
标题:“飞机”,
类型:{u id:“5b21ca3eeb7f6fbccd471814”,名称:“喜剧”},
库存数量:7,
Dailrentalrate:3.5,
喜欢:真的
},
{
_id:“5b21ca3eeb7f6fbccd47181b”,
标题:“婚礼破坏者”,
类型:{u id:“5b21ca3eeb7f6fbccd471814”,名称:“喜剧”},
库存数量:7,
Dailrentalrate:3.5,
喜欢:错
},
{
_id:“5b21ca3eeb7f6fbccd47181e”,
标题:“逝去的女孩”,
类型:{u id:“5b21ca3eeb7f6fbccd471820”,名称:“Thriller”},
库存数量:7,
Dailrentalrate:4.5,
喜欢:错
},
{
_id:“5b21ca3eeb7f6fbccd47181f”,
标题:“第六感”,
类型:{u id:“5b21ca3eeb7f6fbccd471820”,名称:“Thriller”},
库存数量:4,
Dailrentalrate:3.5,
喜欢:真的
},
{
_id:“5b21ca3eeb7f6fbccd471821”,
标题:“复仇者”,
体裁:{u id:“5b21ca3eeb7f6fbccd471818”,名称:“动作”},
库存数量:7,
Dailrentalrate:3.5,
喜欢:错
}
]
}
handleDelete=(电影)=>{
console.log(“电影已删除”)
};
render(){
报税表(
在数据库中显示9部电影
标题
体裁
股票
比率
行动
{this.state.movies.map(movie=>(
{movie.title}
{电影类型}
{movie.numberInStock}
{movie.dailrentalrate}
this.handleDelete(电影)}type=“button”className=“btn btn danger”>删除
))}
);
}
}
导出默认电影;
{movie.genre}
体裁是一个客体。您无法渲染它。将其更改为
{movie.genre.name}
应该可以使用。{movie.genre}
体裁是一个客体。您无法渲染它。将其更改为
{movie.genre.name}
,应该可以使用。尝试{movie.genre.name}
。如果始终是字符串,则可以将其用作react节点。请尝试{movie.genre.name}
。如果始终是字符串,则可以将其用作react节点。
<td>{movie.genre}</td>