[英]Updating redux state by a local state of checkbox items
stackoverflow 中有类似的问题,但我没有找到我想要的东西。 我有一个供体DonationForm,它是一个连接到 redux state 的 class 组件。 该组件的目的是收集有关想要捐赠电子产品的人的信息。 此时,我想将这些项目保存在一个数组中(将来可能使用 object)。 我的 redux state 保存捐赠者信息,减速器如下所示:
import {CHANGE_INPUT_FIELD} from '../utils/constants';
const initialStateInputs = {
// update the state
donorFields: {
name: '',
phone: '',
area: '',
yeshuv: '',
address: ''
// dateOfOffer: ''
},
donationFields: {
// donorID: '',
// vulonteerID: '',
type: [],
quantity: 1,
status: 'NOT_HANDLED',
comments: ''
// lastDateHandled: ''
}
// }, items: [ //need to add quantity
// {id: 1, name: "LAPTOP", isChecked: false, label: 'מחשב'},
// {id: 2, name: "HEADPHONES", isChecked: false, label: 'אוזניות'},
// {id: 3, name: "OTHER", isChecked: false, label: 'אחר'},
// ]
}
export const donorDonationInputsReducer = ( state = initialStateInputs, action={} ) => {
switch(action.type) {
case CHANGE_INPUT_FIELD:
return Object.assign( {}, state,
{
donorFields : {...state.donorFields,...action.payload},
donationFields: {...state.donationFields,...action.payload},
// items : {...state.items,...action.payload},
// isChecked: action.payload
})
default:
return state;
}
}
如您所见,这些项目现在已被评论,我正在本地 state 中管理项目的 state,并且该组合的外观如下:
import React, {Component} from 'react';
import { connect } from 'react-redux';
import { setInputField } from '../actions/formAction';
import CheckBox from '../components/CheckBox/CheckBox';
import FormInput from '../components/FormInput/FormInput';
import {selectAreasOptions_2} from '../utils/constants';
import "./form.css";
const mapStateToProps = (state) => {
return {
donorFields: state.donorDonationInputsReducer.donorFields,
donationFields: state.donorDonationInputsReducer.donationFields
}
}
const mapDispatchToProps = dispatch => {
return {
onInputChange: event => {
const {name, value} = event.target;
dispatch(setInputField( { [name]:value} ) )
}
}
}
class donorDonationForm extends Component {
constructor() {
super();
this.state = {
items: [
{id: 1, name: "LAPTOP", isChecked: false, label: 'מחשב'},
{id: 2, name: "HEADPHONES", isChecked: false, label: 'אוזניות'},
{id: 3, name: "OTHER", isChecked: false, label: 'אחר'},
]
,
type: []
}
}
handleCheckChieldElement = (event) => {
let {items, type} = this.state;
let arr = [];
items.forEach(item => {
if (item.name === event.target.value) {
item.isChecked = event.target.checked;
// console.log(`item.name :${item.name }`);
// console.log(`event.target.value :${event.target.value}`);
// console.log(`event.target.checked :${event.target.checked}`);
}
})
items.map(item => item.isChecked ? arr.push(item.name) : null)
this.setState({items: [...items], type: [...arr]});
}
onButtonSubmit = (event) => {
console.log(this.props.donorFields);
event.preventDefault();
fetch('http://localhost:8000/api/donor', {
method: 'post',
headers: {
'Accept': 'application/json',
'Content-Type': 'application/json'
},
body: JSON.stringify({
...this.props.donorFields
})
})
.then(response => response.json())
.then(resp => console.log(resp))
.catch( err => console.log(err) )
}
// componentDidUpdate(prevProps, prevState) {
// const {items, type} = this.state;
// // const type = [];
// if (prevState.items !== items) {
// console.log('items state has changed');
// items.map (item => item.isChecked ?
// this.setState({type: [...type,item.name]}) : null)
// // if (item.isChecked) { type.push(item.name) } ;
// console.log(type);
// }
// }
render() {
console.log(this.state.items);
console.log(this.state.type);
const { onInputChange } = this.props;
return (
<div>
<h1 className="pt4"> פרטי תורם</h1>
<form className=" black-80 pt2" >
<section className=" grid-container">
<FormInput
id="name"
name="name"
type="text"
onInputChange={onInputChange}
label="שם "
required
/>
<FormInput
id="phone"
name="phone"
type="tel"
onInputChange={onInputChange}
label="מספר טלפון "
required
/>
<FormInput
id="address"
name="address"
type="text"
onInputChange={onInputChange}
label="כתובת "
required
/>
<FormInput
id="yeshuv"
name="yeshuv"
type="text"
onInputChange={onInputChange}
label="עיר "
required
/>
<FormInput
id="comments"
name="comments"
onInputChange={onInputChange}
label="הערות "
required
/>
<FormInput
id="area"
name="area"
onInputChange={onInputChange}
label="איזור "
select={selectAreasOptions_2}
/>
{/* type */}
<div className="measure-narrow">
<label htmlFor="type" className="f5 b db mb2">מעוניין לתרום
<span className="normal black-60"> *</span>
</label>
{
this.state.items.map( (item, i) => {
return (
<CheckBox
key={i}
onChange={this.handleCheckChieldElement}
checked={ item.isChecked }
value= {item.name}
label = {item.label}
/>
);
})
}
</div>
</section>
<input type="submit" value="שלח"
className="b bg-light-blue pa2 hover pointer"
onClick={this.onButtonSubmit}
/>
</form>
</div>
);
}
}
export default connect(mapStateToProps, mapDispatchToProps)(donorDonationForm);
我的主要目标是类型数组 - 最终捐赠,将在提交此表单之前更新 redux state。 我尝试使用 componentDidUpdate 但没有成功。 跟踪检查项目、更新数组然后更新类型数组的最佳方法是什么,这是 redux state 中的最终捐赠? 我应该在 onButtonSubmit 方法中执行此操作吗 - 在将数据发送到服务器之前(这就是保存遍历 items 数组以搜索选中元素的方式)?
更好的方法是在onButtonSubmit
里面做让我简要解释一下任务:
inputChangeHandler
更新this.state.items
this.state.items
值onButtonSubmit
内Array of items
数组Array of items
更新应用程序级别Redux state
。注意:调度操作。 Reducer 将更新 Redux state。 以下代码将执行此操作:
// Action
export const setItems = (data) => (dispatch) => {
dispatch({type: 'SET_ITEMS', payload: data})
}
// mapDispatchToProps
const mapDispatchToProps = (dispatch) =>
bindActionCreators(
{
setItems,
...others
},
dispatch
)
// onSubmitButton
onButtonSubmit = (event) => {
console.log(this.props.donorFields);
event.preventDefault();
fetch('http://localhost:8000/api/donor', {
method: 'post',
headers: {
'Accept': 'application/json',
'Content-Type': 'application/json'
},
body: JSON.stringify({
...this.props.donorFields
})
})
.then(response => this.props.setItems(response.json())) // will update the state.
.then(resp => console.log(resp))
.catch( err => console.log(err) )
}
// Reducer
export const donorDonationInputsReducer = ( state = initialStateInputs, action={} ) => {
switch(action.type) {
case CHANGE_INPUT_FIELD:
return Object.assign( {}, state,
{
donorFields : {...state.donorFields,...action.payload},
donationFields: {...state.donationFields,...action.payload},
// items : {...state.items,...action.payload},
// isChecked: action.payload
})
case SET_ITEMS:
return {
...state,
items: action.payload
}
default:
return state;
}
}
而已。
快乐编码:)
声明:本站的技术帖子网页,遵循CC BY-SA 4.0协议,如果您需要转载,请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.