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[英]What's the best practice to update Redux state in components that needs the same values?
[英]ReactJS + Redux: What's the proper and correct practice to maintain state for a form?
在ReactJS + Redux中,使用Material-UI的TextField
, http://www.material-ui.com/#/components/text-field ,我目前有一个表单,用户可以在其中填写firstName,lastName,birthMonth,birthdayDay,birthYear 。
我有以下内容,所有内容都可以使用,但似乎非常多余,尤其是对于出生日期而言,例如,对每个输入都采取措施并也对每个更改进行更新:
在组件InputComponent.js
:
updateFirstName(event) {
this.props.actions.updateFirstName(event.target.value)
}
updateLastName(event) {
this.props.actions.updateLastName(event.target.value)
}
updateBirthMonth(event) {
this.props.actions.updateBirthMonth(event.target.value)
}
updateBirthDay(event) {
this.props.actions.updateBirthDay(event.target.value)
}
updateBirthYear(event) {
this.props.actions.updateBirthYear(event.target.value)
}
<TextField
hintText="Enter First Name"
onChange={this.updateFirstName}
value={this.props.userInfo.firstName}
/>
<TextField
hintText="Enter Last Name"
onChange={this.updateLastName}
value={this.props.userInfo.lastName}
/>
<TextField
hintText="Enter Birth Month"
onChange={this.updateBirthMonth}
value={this.props.userInfo.birthMonth}
/>
<TextField
hintText="Enter Birth Day"
onChange={this.updateBirthDay}
value={this.props.userInfo.birthDay}
/>
<TextField
hintText="Enter Birth Year"
onChange={this.updateBirthYear}
value={this.props.userInfo.birthYear}
/>
然后针对我的动作:
updateFirstName(eventValue) {
return {
type: 'UPDATE_FIRST_NAME',
firstName: eventValue
}
},
updateLastName(eventValue) {
return {
type: 'UPDATE_LAST_NAME',
lastName: eventValue
}
},
updateBirthMonth(eventValue) {
return {
type: 'UPDATE_BIRTH_MONTH',
birthMonth: eventValue
}
},
updateBirthDay(eventValue) {
return {
type: 'UPDATE_BIRTH_DAY',
birthDay: eventValue
}
},
updateBirthYear(eventValue) {
return {
type: 'UPDATE_BIRTH_YEAR',
birthYear: eventValue
}
},
然后在我的减速器中, userReducer.js
:
const userReducer = function(userInfo = {}, action){
switch(action.type){
case 'UPDATE_FIRST_NAME':
return {
...userInfo,
firstName: action.firstName
}
case 'UPDATE_LAST_NAME':
return {
...userInfo,
lastName: action.lastName
}
case 'UPDATE_BIRTH_MONTH':
return {
...userInfo,
birthMonth: action.birthMonth
}
case 'UPDATE_BIRTH_DAY':
return {
...userInfo,
birthDay: action.birthDay
}
case 'UPDATE_BIRTH_YEAR':
return {
...userInfo,
birthYear: action.birthyear
}
default:
return userInfo
}
}
export default userReducer
对于ReactJS + Redux,是否有更好,更适当和有效的实践来处理某种形式的输入?
先感谢您!
预警,我对React还是很陌生,只是想提供一种思路,以至于无法添加为评论。 如果失败,我将删除答案...
您可以将所有更新功能合并到一个updateUserInfo
吗?
// Component
<TextField name="firstName" onChange={this.updateUserInfo} ... />
<TextField name="lastName" onChange={this.updateUserInfo} ... />
updateUserInfo(event) {
this.props.actions.updateUserInfo(event.target.name, event.target.value);
}
// Action
updateUserInfo(eventProperty, eventValue) {
return {
type: 'UPDATE_USER_INFO',
property: eventProperty,
value: eventValue
};
}
// Reducer
const userReducer = function(userInfo = {}, action){
switch(action.type){
case 'UPDATE_USER_INFO':
var returnObj = {
...userInfo
};
returnObj[action.property] = action.value;
return returnObj;
}
}
替代动作和减速器:
// Action
updateUserInfo(eventProperty, eventValue) {
var updatedData = {};
updatedData[eventProperty] = eventValue;
return {
type: 'UPDATE_USER_INFO',
data: updatedData
};
}
// Reducer
const userReducer = function(userInfo = {}, action){
switch(action.type){
case 'UPDATE_USER_INFO':
return {
...userInfo,
...action.data
};
}
}
我强烈建议您查看redux-form 。
您的表单将如下所示( 此处的示例 ):
import React, {Component} from 'react';
import {reduxForm} from 'redux-form';
class ContactForm extends Component {
render() {
const {fields: {firstName, lastName, email}, handleSubmit} = this.props;
return (
<form onSubmit={handleSubmit}>
<div>
<label>First Name</label>
<input type="text" placeholder="First Name" {...firstName}/>
</div>
<div>
<label>Last Name</label>
<input type="text" placeholder="Last Name" {...lastName}/>
</div>
<div>
<label>Email</label>
<input type="email" placeholder="Email" {...email}/>
</div>
<button type="submit">Submit</button>
</form>
);
}
}
ContactForm = reduxForm({ // <----- THIS IS THE IMPORTANT PART!
form: 'contact', // a unique name for this form
fields: ['firstName', 'lastName', 'email'] // all the fields in your form
})(ContactForm);
export default ContactForm;
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