在某些情况下仅重定向
在某些情况下仅重定向
提问于 2020-03-08 13:55:02
我已经实现了这样的私有路由。如果localStorage中存在令牌，则可以访问私有路由。如果没有，我们应该重定向到/404页面：
const token = localStorage.getItem('token');
const PrivateRoute = ({component, isAuthenticated, ...rest}: any) => {
const routeComponent = (props: any) => (
isAuthenticated
? React.createElement(component, props)
: <Redirect to={{pathname: '/404'}}/>
);
return <Route {...rest} render={routeComponent}/>;
};但是我也在我的LoginPage中使用重定向。
我希望如果登录失败，将显示来自ShowError()的错误消息。而不是重定向。在我添加重定向之前，这是正常工作的。如果登录成功，我应该转到/panel。但是，现在，如果登录失败，我只需转到/404。而不是显示错误消息。我怎么才能解决这个问题？
登录屏幕：
function LoginPage (){
const [state, setState] = useState({
email: '',
password: '',
});
const [submitted, setSubmitted] = useState(false);
function ShowError(){
if (!localStorage.getItem('token'))
{
console.log('Login Not Successful');
return (
<ThemeProvider theme={colortheme}>
<Typography color='primary'>
Login Unsuccessful
</Typography>
</ThemeProvider>)
}
}
function FormSubmitted(){
setSubmitted(true);
}
function RedirectionToPanel(){
if(submitted && localStorage.getItem('token')){
return <Redirect to='/panel'/>
}
}
function submitForm(LoginMutation: any) {
const { email, password } = state;
if(email && password){
LoginMutation({
variables: {
email: email,
password: password,
},
}).then(({ data }: any) => {
localStorage.setItem('token', data.loginEmail.accessToken);
})
.catch(console.log)
}
}
return (
<Mutation mutation={LoginMutation}>
{(LoginMutation: any) => (
<Container component="main" maxWidth="xs">
<CssBaseline />
<div style={{
display: 'flex',
flexDirection: 'column',
alignItems: 'center'
}}>
<Avatar>
<LockOutlinedIcon />
</Avatar>
<Typography component="h1" variant="h5">
Sign in
</Typography>
<Formik
initialValues={{ email: '', password: '' }}
onSubmit={(values, actions) => {
setTimeout(() => {
alert(JSON.stringify(values, null, 2));
actions.setSubmitting(false);
}, 1000);
}}
validationSchema={schema}
>
{props => {
const {
values: { email, password },
errors,
touched,
handleChange,
isValid,
setFieldTouched
} = props;
const change = (name: string, e: any) => {
e.persist();
handleChange(e);
setFieldTouched(name, true, false);
setState( prevState => ({ ...prevState, [name]: e.target.value }));
};
return (
<form style={{ width: '100%' }}
onSubmit={e => {e.preventDefault();
submitForm(LoginMutation);FormSubmitted();RedirectionToPanel()}}>
<TextField
variant="outlined"
margin="normal"
id="email"
fullWidth
name="email"
helperText={touched.email ? errors.email : ""}
error={touched.email && Boolean(errors.email)}
label="Email"
value={email}
onChange={change.bind(null, "email")}
/>
<TextField
variant="outlined"
margin="normal"
fullWidth
id="password"
name="password"
helperText={touched.password ? errors.password : ""}
error={touched.password && Boolean(errors.password)}
label="Password"
type="password"
value={password}
onChange={change.bind(null, "password")}
/>
{submitted && ShowError()}
<FormControlLabel
control={<Checkbox value="remember" color="primary" />}
label="Remember me"
/>
<br />
<Button className='button-center'
type="submit"
disabled={!isValid || !email || !password}
// onClick={handleOpen}
style={{
background: '#6c74cc',
borderRadius: 3,
border: 0,
color: 'white',
height: 48,
padding: '0 30px'
}}
>
Submit</Button>
<br></br>
<Grid container>
<Grid item xs>
</form>
)
}}
</Formik>
</div>
{submitted && <Redirect to='/panel'/>}
</Container>
)
}
</Mutation>
);
}
export default LoginPage;编辑：：
我也试过用这个：
if(localStorage.getItem('token')){
return <Redirect to='/panel'/>
}
});但是它给了我一个箭头上的错误：
Argument of type '() => JSX.Element | undefined' is not assignable to parameter of type 'EffectCallback'.
Type 'Element | undefined' is not assignable to type 'void | (() => void | undefined)'.
Type 'Element' is not assignable to type 'void | (() => void | undefined)'.
Type 'Element' is not assignable to type '() => void | undefined'.
Type 'Element' provides no match for the signature '(): void | undefined'.ts(2345)回答 1
Stack Overflow用户
发布于 2020-03-08 14:18:04
在容器的末尾移除这一行。
{submitted && <Redirect to='/panel'/>}因为去那里是没有意义的。此外，调整submit方法以正确执行函数。
function submitForm(LoginMutation: any) {
const { email, password } = state;
return LoginMutation({
variables: {
email,
password,
},
}).then(({ data }: any) => {
localStorage.setItem('token', data.loginEmail.accessToken);
}).catch(console.error);
}有了从submitForm方法返回的承诺，您可以执行以下操作。
onSubmit={e => {
e.preventDefault();
submitForm(LoginMutation).then((res: any) => {
RedirectionToPanel();
FormSubmitted();
});
}}页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/60588203
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