我有一个Rails 5.1应用程序,通过webpacker安装了React。我有一个资源,我有一个JSON端点,但当我尝试拉这个,我在终端上收到一个错误:
我正在使用fetch("roasts.json")
的本地路径
Completed 401 Unauthorized in 7ms (ActiveRecord: 2.0ms)
或者,如果我使用完整路径fetch("https://www.gourmetcoffee.london/roasts.json")
,我在终端中没有收到任何错误,但在浏览器中收到Error: NetworkError when attempting to fetch resource.
。
我从www.reactjs.org获得了很多代码:
import React from 'react'
import ReactDOM from 'react-dom'
class AllRoasts extends React.Component {
constructor(props) {
super(props);
this.state = {
error: null,
isLoaded: false,
items: []
};
}
componentDidMount() {
fetch("roasts.json")
//.then(res => res.json())
.then(
(result) => {
this.setState({
isLoaded: true,
items: result.items
});
},
// Note: it's important to handle errors here
// instead of a catch() block so that we don't swallow
// exceptions from actual bugs in components.
(error) => {
this.setState({
isLoaded: true,
error
});
}
)
}
render() {
const { error, isLoaded, items } = this.state;
if (error) {
return <div>Error: {error.message}</div>;
} else if (!isLoaded) {
return <div>Brewing...</div>;
} else {
return (
<ul>
{items.map(item => (
<li key={id}>
{item.name}
</li>
))}
</ul>
);
}
}
}
export default AllRoasts