在登录时,如果电子邮件和密码为空,则会引发如下错误:
{
"errors": {
"email": "please enter valid emails",
"password": "please enter password"
}
}
在我发送的API /登录名上:
{
"email":"",
"password":""
}
我想在我的React.js前端显示此错误,所以我尝试以下代码:
import React, { Component } from 'react'
import { withStyles } from '@material-ui/styles';
import PropTypes from 'prop-types'
import AppIcon from '../images/icon.png'
//mivi stuff
import Grid from '@material-ui/core/Grid';
import Typography from '@material-ui/core/Typography';
import TextField from '@material-ui/core/TextField';
import Button from '@material-ui/core/Button';
import axios from 'axios';
class login extends Component {
constructor(){
super();
this.state ={
email:'',
password:'',
loading:false,
error: {}
}
}
handleChnage = (event) => {
this.setState({
[event.target.name]: event.target.value
})
}
handleSubmit = (event) => {
// console.log('hi');
event.preventDefault();
this.setState({
loading:true
});
const userData ={
email:this.state.email,
password:this.state.password
}
axios.post('/login', userData)
.then((res) =>{
//console.log(res.data)
this.setState({
loading:false
});
this.props.history.push('/');
})
.catch((err) =>{
this.setState({
errors:err.response.data,
loading:false
})
})
}
render() {
const {classes} = this.props;
const {error ,loading} = this.state
return (
<Grid container className={classes.form}>
<Grid item sm />
<Grid item sm >
<img src={AppIcon} alt="app cion" className={classes.image}/>
<Typography variant="h2" className={classes.pagetitle}>Login</Typography>
<form noValidate onSubmit={this.handleSubmit}>
<TextField id="email" name="email" type="email" label="Email" className={classes.textfeild}
helperText={error.email} error={error.email ? true : false} value={this.state.email} onChange={this.handleChnage} fullWidth />
<TextField id="password" name="password" type="password" label="Password" className={classes.textfeild}
helperText={error.password} error={error.password ? true : false} value={this.state.password} onChange={this.handleChnage} fullWidth />
<Button type="submit" variant="contained" color="primary" className={classes.button}>Login </Button>
</form>
</Grid>
<Grid item sm />
</Grid>
)
}
}
login.propTypes ={
classes:PropTypes.object.isRequired
}
export default withStyles(styles)(login);
当用户名和密码为空并且单击时,这些错误不会显示。我该如何解决?
因为API错误位于错误对象的内部,所以我希望这是为什么它不显示,但是我无法将其改回来,我想显示电子邮件或密码是否为空。我想在这里显示该错误:
在helperText={error.email} helperText={error.password}
一侧
答案 0 :(得分:2)
将您的.catch
块更新为
.catch((err) =>{
const { errors } = err.response.data;
this.setState({
errors,
loading:false
})
})
答案 1 :(得分:1)
您的状态为error
,而您试图将值分配给errors
,则需要将状态设置为error
。因为您使用error.email
和error.password
来显示错误。
.catch((err) =>{
this.setState({
error:err.response.data,
loading:false
})
})
更新
由于err.response.data
的原因,
错误:对象{电子邮件:“请输入有效的电子邮件”,密码:“请输入密码”}
您需要像这样从errors
访问err.response.data
,
.catch((err) =>{
this.setState({
error:err.response.data.errors,
loading:false
})
})