Axios Post Form with Reactjs
Axios Post Form with Reactjs
提问于 2018-05-31 14:28:15
所以我有这个Axios的post方法，如果我提交这个，它说
未捕获(承诺中)错误:位于createError (createError.js:16) at XMLHttpRequest.handleError (xhr.js:87)的网络错误
如果我使用这个方法：
axios.post('http://localhost:5000/users', ({userid: this.state.userid})它起作用了。但是如果我在axios post中添加2个或更多的arg，它会再次出错：
axios.post('http://localhost:5000/users', ({userid: this.state.userid}, {fullname: this.state.fullname} ))这是我的完整代码。正如你所看到的，我尝试了不同的代码组合，只有当我只传递1个arg时，它才有效。
import React from 'react';
import axios from 'axios';
// import { Form } from 'antd';
// import { List, Card, Form } from 'antd';
export default class FormUser extends React.Component {
// constructor(props) {
// super(props)
// this.state = {
state = {
userid: '',
fullname: '',
usergroup:'',
emailid: '',
mobile: '',
title: '',
};
handleChange = event => {
this.setState({ userid: event.target.value });
this.setState({ fullname: event.target.value });
this.setState({ usergroup: event.target.value });
this.setState({ emailid: event.target.value });
this.setState({ mobile: event.target.value });
this.setState({ title: event.target.value });
}
handleSubmit = event => {
event.preventDefault();
// const userform = {userid: this.state.userid};
// const fullnameForm = {fullname: this.state.fullname};
// const usergroupForm = {usergroup: this.state.usergroup};
// const emailidForm = {emailid: this.state.emailid};
// const mobileForm = {mobile: this.state.mobile};
// const titleForm = {title: this.state.title};
axios.post('http://localhost:5000/users', ({userid: this.state.userid}, {fullname: this.state.fullname} ))
// { {userid: this.state.userid}, {fullname: this.state.fullname} , usergroup: this.state.usergroup, emailid: this.state.emailid, mobile: this.state.mobile, title: this.state.title })
// { userform, fullnameForm, usergroupForm, emailidForm, mobileForm, titleForm })
.then(res => {
console.log(res);
console.log(res.data);
})
}
render() {
return (
<form onSubmit={this.handleSubmit}>
<label>User Project ID: <input type="text" name="userid" onChange={this.handleChange}/></label><br/>
<label>Full Name: <input type="text" name="fullname" onChange={this.handleChange}/></label><br/>
<label>User Group: <input type="text" name="usergroup" onChange={this.handleChange}/></label><br/>
<label>Email: <input type="text" name="emailid" onChange={this.handleChange}/></label><br/>
<label>Mobile: <input type="text" name="mobile" onChange={this.handleChange}/></label><br/>
<label>Title: <input type="text" name="title" onChange={this.handleChange}/></label>
<button type="submit">Add</button>
</form>
)
}
}AXIOS在Express上的帖子
app.post('/users', function (req, res) {
var postData = req.body;
// postData.created_at = new Date();
connection.query("INSERT INTO users SET ?", postData, function (error, results, fields) {
if (error) throw error;
console.log(results.insertId);
res.end(JSON.stringify(results));
});
});回答 3
Stack Overflow用户
回答已采纳
发布于 2019-03-25 00:59:49
每个州的eventHandler。有没有办法让我做得更好？是的，它可以像这样工作。
import React, { Component } from 'react';
class UserForm extends Component {
constructor() {
super();
this.state = {
fname: '',
lname: '',
email: '',
};
}
onChange = (e) => {
/*
Because we named the inputs to match their
corresponding values in state, it's
super easy to update the state
*/
this.setState({ [e.target.name]: e.target.value });
}
render() {
const { fname, lname, email } = this.state;
return (
<form>
<input
type="text"
name="fname"
value={fname}
onChange={this.onChange}
/>
<input
type="text"
name="lname"
value={lname}
onChange={this.onChange}
/>
<input
type="text"
name="email"
value={email}
onChange={this.onChange}
/>
</form>
);
}
}关于表单的提交，您的axios帖子的工作原理如下
onSubmit = (e) => {
e.preventDefault();
// get our form data out of state
const { fname, lname, email } = this.state;
axios.post('/', { fname, lname, email })
.then((result) => {
//access the results here....
});
}Stack Overflow用户
发布于 2018-05-31 14:31:51
axios.post(url[, data[, config]])的第三个参数是Axios配置对象，您无意中传入了该对象
axios.post('http://localhost:5000/users', ({userid: this.state.userid}, {fullname: this.state.fullname} ))因此，请求配置错误，无法正常工作。
相反，所有要POST的数据都应该在单个data对象中。
axios.post('http://localhost:5000/users', {
userid: this.state.userid,
fullname: this.state.fullname,
})Stack Overflow用户
发布于 2018-05-31 18:25:07
显然，我必须为每个州添加eventhandler。有没有办法让我做得更好？
import React from 'react';
import axios from 'axios';
import { Form } from 'antd';
// import { List, Card, Form } from 'antd';
const FormItem = Form.Item;
export default class FormUser extends React.Component {
// constructor(props) {
// super(props)
// this.state = {
state = {
userid: '',
fullname: '',
usergroup: '',
emailid: '',
mobile: '',
title: '',
};
handleUserIDChange = event => {this.setState({ userid: event.target.value })}
handleFullNameChange = event => {this.setState({ fullname: event.target.value })}
handleUserGroupChange = event => {this.setState({ usergroup: event.target.value })}
handleEmailIDChange = event => {this.setState({ emailid: event.target.value })}
handleMobileChange = event => {this.setState({ mobile: event.target.value })}
handleTitleChange = event => {this.setState({ title: event.target.value })}
handleSubmit = event => {
event.preventDefault();
// const userform = {userid: this.state.userid};
// const fullnameForm = {fullname: this.state.fullname};
// const usergroupForm = {usergroup: this.state.usergroup};
// const emailidForm = {emailid: this.state.emailid};
// const mobileForm = {mobile: this.state.mobile};
// const titleForm = {title: this.state.title};
axios.post('http://localhost:5000/users',
{ userid: this.state.userid, fullname: this.state.fullname, usergroup: this.state.usergroup, emailid: this.state.emailid, mobile: this.state.mobile, title: this.state.title },)
.then(res => {
console.log(res);
console.log(res.data);
})
}
render() {
return (
// const formItemLayout = {
// labelCol: {
// xs: { span: 24 },
// sm: { span: 8 },
// },
// wrapperCol: {
// xs: { span: 24 },
// sm: { span: 16},
// },
// };
<Form onSubmit={this.handleSubmit}>
<FormItem>
<label>User Project ID: <input type="text" name="this.state.userid" onChange={this.handleUserIDChange} /></label>
</FormItem>
<FormItem>
<label>Full Name: <input type="text" name="this.state.fullname" onChange={this.handleFullNameChange} /></label><br />
</FormItem>
<FormItem>
<label>User Group: <input type="text" name="this.state.usergroup" onChange={this.handleUserGroupChange} /></label><br />
</FormItem>
<FormItem>
<label>Email: <input type="text" name="this.state.emailid" onChange={this.handleEmailIDChange} /></label>
</FormItem>
<FormItem>
<label>Mobile: <input type="text" name="this.state.mobile" onChange={this.handleMobileChange} /></label>
</FormItem>
<FormItem>
<label>Title: <input type="text" name="this.state.title" onChange={this.handleTitleChange} /></label>
</FormItem>
<button type="submit">Add</button>
</Form>
)
}
}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/50617966
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