我正在制作一个简单的应用程序,用户可以在其中找到电影(使用OMDB API)。所以我做到了。但是当我输入一部不存在的电影时,我有一个未定义的地图错误。这是合乎逻辑的,因为不存在带有此类数据的数组。如何进行验证以将错误通知用户。
搜索功能
const [state, setState] = useState({
s: '',
response: [],
selected: {}
});
const apiURL = 'http://www.omdbapi.com/?apikey=73f30b51'
const searchFilm = e => {
if(e.key === 'Enter'){
axios(apiURL + "&s=" + state.s).then(({data}) => {
let response = data.Search;
setState(prevState => {
return {...prevState, response: []},
{...prevState, response: response}
})
})
}
}
过滤器(地图错误)
const Result = ({response,openCurrentMovie}) => {
return(
<div className="results">
{response.map(result => (
<Movie key={result.imdbID} result={result} openCurrentMovie={openCurrentMovie}/>
))}
</div>
)
}
答案 0 :(得分:0)
如果response = data.Search;
未定义,则可以设置错误状态,并使用它向用户呈现消息。
const [error, setError] = useState(null); // use error value to render a component to show error
const searchFilm = e => {
if(e.key === 'Enter'){
axios(apiURL + "&s=" + state.s).then(({data}) => {
let response = data.Search;
if(!response){
setError(true) // setting the error as true. You can give some specific message as well
}
setState(prevState => {
return {...prevState, response: response}
})
})
}
}
答案 1 :(得分:0)
只需检查渲染功能中response
中是否有东西:
const Result = ({response,openCurrentMovie}) => {
if (!response) return <div>Sorry bro, no movie found</div>
return(
...