问题
I am trying to implement product list table.
What i have done is as under,
import React, { Component } from 'react';
import { Row, Col, Card, CardBody } from 'reactstrap';
import { withRouter, Link } from 'react-router-dom';
import { activateAuthLayout, onLoad } from '../../../store/actions';
import { connect } from 'react-redux';
import Settingmenu from '../Subpages/Settingmenu';
//images
import default_image from '../../../images/users/user-1.jpg';
const ListProducts = props => {
if (props.is_loading === true)
return (
<tr>
<td colSpan="7">Loading....</td>
</tr>
);
return (
props.products.map(product => {
return <TableRow
key={product.id}
product={product}
is_checked={props.is_checked}
handleIndividualCheck={props.handleIndividualCheck}
/>
})
);
}
class TableRow extends Component {
constructor(props) {
super(props);
this.state = {}
}
render() {
console.log(this.props);
let quantities = this.props.product.variants.map(a => a.inventory_quantity),
total_count = quantities.reduce((a, b) => a + b, 0) + ' in stock ';
return (
<tr>
<td>
<input
type="checkbox"
checked={this.props.is_checked}
onChange={this.props.handleIndividualCheck}
/>
</td>
<td><div className="media mb-4">
<img className="d-flex align-self-start rounded mr-3" src={this.props.product.image ? this.props.product.image.src : default_image} alt="Veltrix" height="64" />
<div className="media-body">
<p style={{ fontWeight: '600', fontSize: 'small' }} className="product-list-title text-justify">{this.props.product.title}</p>
</div>
</div></td>
<td style={{ textAlign: "center" }}>{total_count}</td>
<td><span className="badge badge-soft-primary badge-pill"><i className="mdi mdi-checkbox-blank-circle mr-1"></i>{this.props.product.product_type || 'n/a'}</span></td>
<td>
{this.props.product.vendor}
</td>
</tr>
)
}
}
class ProductLists extends Component {
constructor(props) {
super(props);
this.state = {};
}
render() {
console.log(this.props)
return (
<table className="table project-table">
<thead>
<tr>
<th style={{ width: '3px' }}><input onClick={this.props.handleSelectCheckbox} type="checkbox" /></th>
<th style={{ width: '30%' }} scope="col">Products</th>
<th style={{ textAlign: 'center' }} scope="col">Inventory</th>
<th style={{ width: '15p%' }} scope="col">type</th>
<th scope="col">Vendor</th>
</tr>
</thead>
<tbody>
<ListProducts
products={this.props.products}
is_loading={this.props.is_loading}
is_checked={this.props.is_checked}
handleIndividualCheck={this.props.handleIndividualCheck}
/>
</tbody>
</table>
);
}
}
class EcommerceProductEdit extends Component {
constructor(props) {
super(props);
this.state = { checked: false }
}
componentDidMount() {
this.props.activateAuthLayout();
if (this.props.user !== null && this.props.user.shop_id)
this.props.onLoad({
payload: this.props.user
});
}
handleSelectCheckbox = event => {
this.setState({ checked: !this.state.checked });
};
handleIndividualCheck = event => {
console.log(event);
}
render() {
return (
<React.Fragment>
<div className="content">
<div className="container-fluid">
<div className="page-title-box">
<Row className="align-items-center">
<Col sm="6">
<h4 className="page-title">Products </h4>
<ol className="breadcrumb">
<li className="breadcrumb-item"><Link to="#"><i className="mdi mdi-home-outline"></i></Link></li>
<li className="breadcrumb-item active">Products</li>
</ol>
</Col>
<Col sm="6">
<div className="float-right d-none d-md-block">
<Settingmenu />
</div>
</Col>
</Row>
</div>
<Row>
<Col xl="3" md="6">
<Card className="bg-pattern">
<CardBody>
<div className="float-right">
<i className="dripicons-archive text-primary h4 ml-3"></i>
</div>
<h5 className="font-20 mt-0 pt-1">24</h5>
<p className="text-muted mb-0">Total Projects</p>
</CardBody>
</Card>
</Col>
<Col xl="3" md="6">
<Card className="bg-pattern">
<CardBody>
<div className="float-right">
<i className="dripicons-trophy text-primary h4 ml-3"></i>
</div>
<h5 className="font-20 mt-0 pt-1">18</h5>
<p className="text-muted mb-0">Completed Projects</p>
</CardBody>
</Card>
</Col>
<Col xl="3" md="6">
<Card className="bg-pattern">
<CardBody>
<div className="float-right">
<i className="dripicons-hourglass text-primary h4 ml-3"></i>
</div>
<h5 className="font-20 mt-0 pt-1">06</h5>
<p className="text-muted mb-0">Pending Projects</p>
</CardBody>
</Card>
</Col>
<Col xl="3" md="6">
<Card>
<CardBody>
<form>
<div className="form-group mb-0">
<label>Search</label>
<div className="input-group mb-0">
<input type="text" className="form-control" placeholder="Search..." aria-describedby="project-search-addon" />
<div className="input-group-append">
<button className="btn btn-danger" type="button" id="project-search-addon"><i className="mdi mdi-magnify search-icon font-12"></i></button>
</div>
</div>
</div>
</form>
</CardBody>
</Card>
</Col>
</Row>
<Row>
<Col lg="12">
<Card>
<CardBody>
<div className="table-responsive project-list">
<ProductLists
{...this.props}
handleIndividualCheck={this.handleIndividualCheck}
is_checked={this.state.checked}
handleSelectCheckbox={this.handleSelectCheckbox}
/>
</div>
<div className="pt-3">
<ul className="pagination justify-content-end mb-0">
<li className="page-item disabled">
<Link className="page-link" to="#" tabIndex="-1" aria-disabled="true">Previous</Link>
</li>
<li className="page-item"><Link className="page-link" to="#">1</Link></li>
<li className="page-item active"><Link className="page-link" to="#">2</Link></li>
<li className="page-item"><Link className="page-link" to="#">3</Link></li>
<li className="page-item">
<Link className="page-link" to="#">Next</Link>
</li>
</ul>
</div>
</CardBody>
</Card>
</Col>
</Row>
</div>
</div>
</React.Fragment>
);
}
}
const mapStatetoProps = state => {
const { user, is_logged_in } = state.Common;
const { products, is_loading } = state.Products;
return { user, is_logged_in, products, is_loading };
}
export default withRouter(connect(mapStatetoProps, { activateAuthLayout, onLoad })(EcommerceProductEdit));
I need to now when user check unchecked some of the lists to perform operation. How do I do that ? Do it make the array of checked / unchecked items after the are checked/unchecked, or is there other way that i can do with this.props.products object lists ?
Any kin d of suggestion are highly appreciated.
Also In EcommerceProductEdit component did mount after performing
this.props.onLoad({
payload: this.props.user
});
why i am not being able to get this.props.product in constructor but only in render ? Thanks
回答1:
Your idea to keep an array of checked items is close, though I'd suggest using a map so you have O(1) constant time lookups of checked item status.
Gist
Keep a map of checked item id's, the onChange passes the input id and checked value, and the id is used to retrieve the checked value.
Changes to Manage Checked State
Update handleIndividualCheck to destructure checked and input id from the event and update the checked state.
class EcommerceProductEdit extends Component {
constructor(props) {
super(props);
this.state = {
checked: {}, // <-- Object to store id's as keys and checked status as values
};
}
...
handleIndividualCheck = event => {
const { checked, id } = event.target;
this.setState(prevState => ({
checked: {
...prevState.checked,
[id]: checked
},
}));
}
render() {
return (
...
<ProductLists
{...this.props}
handleIndividualCheck={this.handleIndividualCheck}
is_checked={this.state.checked}
handleSelectCheckbox={this.handleSelectCheckbox}
/>
...
);
}
}
Update ListProducts to check the is_checked prop by product id
const ListProducts = props => {
...
return (
props.products.map(product => {
return <TableRow
key={product.id}
product={product}
is_checked={props.is_checked[product.id]} // <-- is_checked now checked value from checked map!
handleIndividualCheck={props.handleIndividualCheck}
/>
)
);
}
Update TableRow input to name the input with the product id
<input
type="checkbox"
id={propduct.id} // <-- Pass product id to input id for event
checked={this.props.is_checked}
onChange={this.props.handleIndividualCheck}
/>
Change to Handle Performing Operation on Unchecked Item
I need to now when user check unchecked some of the lists to perform operation. How do I do that?
You can check if an input was unchecked right in the handler and perform operation.
handleIndividualCheck = event => {
const { checked, id } = event.target;
this.setState(prevState => ({
checked: {
...prevState.checked,
[id]: checked
},
}));
if (!checked) {
// perform operation on product by id
}
}
来源：https://stackoverflow.com/questions/62643684/implementing-check-boxes-in-react