我正在尝试根据表单组件的状态触发适当的消息,以在表单提交时进行前端验证。
我正在进行的主要验证之一是检查电子邮件是否存在,如果存在,则应该继续看到错误消息触发。如果数据库中不存在成功消息,则应触发;当然,如果其他验证通过!
我正在使用Semantic-UI React Forms来帮助验证。
这些是我在表单组件的状态对象上设置的键和值:
this.state = {
fadeUp: 'fade up',
duration: 500,
username: '',
password: '',
usernameError: false,
passwordError: false,
formSuccess: false,
formError: false,
userNameDup: false,
}
这是我的提交处理程序,它在提交时触发:
handleSubmit(event) {
event.preventDefault();
var error = false
var { username, password, userNameDup } = this.state
var mailFormat = /^(([^<>()\[\]\\.,;:\s@"]+(\.[^<>()\[\]\\.,;:\s@"]+)*)|(".+"))@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}])|(([a-zA-Z\-0-9]+\.)+[a-zA-Z]{2,}))$/
if (!username.match(mailFormat)) {
this.setState({ usernameError: true });
error = true;
} else {
this.setState({ usernameError: false });
}
if (password.length < 8) {
this.setState({ passwordError: true });
error = true;
} else {
this.setState({ passwordError: false })
}
if (error) {
this.setState({ formSuccess: false });
return;
} else {
this.setState({ formSuccess: true });
}
window.fetch('http://localhost:8016/users/registration', {
method: 'POST',
headers: { 'Accept': 'application/json', 'Content-Type': 'application/json' },
body: JSON.stringify({ username_email: username, password: password })
})
.then(this.handleErrors)
.then(function (response) {
console.log(`response ${response}`)
return response.json()
}).then(function (data) {
console.log('User created:', data)
}).catch(function (error) {
console.log(error);
});
setTimeout(() => { this.setState({ username: '', password: '' }) })
}
handleErrors(response) {
if (!response.ok) {
if (response.status === 409) {
console.log("response.status ", response.status);
this.setState({
userNameDup: true, formError: true, formSuccess:false
});
return;
}
} else {
this.setState({
userNameDup: false, formError:false
})
}
return response;
}
这是表单视图/标记的一部分:
{console.log("formSuccess 1", formSuccess)}
<Form size='large'
onSubmit={this.handleSubmit}
error={userNameDup || formError}>
{console.log("formSuccess 2", formSuccess)}
<Segment stacked>
<Form.Input fluid icon='user'
iconPosition='left'
placeholder='E-mail address, e.g. joe@schmoe.com'
name='username'
value={username}
onBlur={this.handleBlur}
onChange={this.handleChange}
error={usernameError}
/>
<Transition visible={usernameError}
animation='scale'
duration={duration}>
<Message error content='username_Email is in incorrect format e.g. joe@schmoe.com' />
</Transition>
<Form.Input fluid icon='lock'
iconPosition='left'
placeholder='Password'
name='password'
value={password}
onBlur={this.handleBlur}
onChange={this.handleChange}
error={passwordError}
/>
<Transition visible={passwordError}
animation='scale'
duration={duration}>
<Message error content='Password needs to be greater than eight characters.' />
</Transition>
<Button color='teal'
fluid size='large'
disabled={!username || !password}>
Register
{/* {isLoggedIn ? `Register` : `Log-in`} */}
</Button>
<Transition visible={userNameDup || formError}
unmountOnHide={true}
animation='scale'
duration={duration}>
<Message
error
centered="true" header='This email exists.'
content='Please re-enter another email address.' />
</Transition>
<Transition visible={formSuccess}
unmountOnHide={true}
animation='scale'
duration={duration}>
<Message
success
header='Your user registration was successful.'
content='You may now log-in with the username you have chosen.' />
</Transition>
</Segment>
</Form>
我提供了一个,您可以看到导致问题的
formSuccess
关键跳转到一秒钟。true
但我认为我handleError
在提交时会处理这个问题?
再次处理错误:
handleErrors(response) {
if (!response.ok) {
if (response.status === 409) {
console.log("response.status ", response.status);
this.setState({
userNameDup: true, formError: true, formSuccess:false /* why doesn't it stay falsey? */
});
return;
}
} else {
this.setState({
userNameDup: false, formError:false
})
}
return response;
}
句柄提交的摘录:
window.fetch('http://localhost:8016/users/registration', {
method: 'POST',
headers: { 'Accept': 'application/json', 'Content-Type': 'application/json' },
body: JSON.stringify({ username_email: username, password: password })
})
.then(this.handleErrors) /* Shouldn't this be where it changes to false? */
.then(function (response) {
console.log(`response ${response}`)
return response.json()
}).then(function (data) {
console.log('User created:', data)
}).catch(function (error) {
console.log(error);
});
每次点击注册时,消息不应该动画吗?
请帮忙!!!谢谢!