我正在通过API显示数据(数据以分页显示),API是在Loopback中构建的。我想对项目进行排序。例如,如果用户单击Table head属性,则它将按asc和desc排序数据。我是新来的ReactJS,没有太多的知识来实现这种逻辑,请有人帮我弄清楚。谢谢
代码
class Example extends React.Component {
constructor(props) {
super(props);
this.state = {
Item: 5,
skip: 0
}
this.handleClick = this.handleClick.bind(this);
}
urlParams() {
return `http://localhost:3001/meetups?filter[limit]=${(this.state.Item)}&&filter[skip]=${this.state.skip}`
}
handleClick() {
this.setState({skip: this.state.skip + 1})
}
render() {
return (
<div>
<a href={this.urlParams()}>Example link</a>
<pre>{this.urlParams()}</pre>
<button onClick={this.handleClick}>Change link</button>
</div>
)
}
}
ReactDOM.render(<Example/>, document.querySelector('div#my-example' ))
答案 0 :(得分:1)
让我们假设您已获取数据,现在状态如下:
state ={
data : [13,15,21,1,2]
}
现在服务器上的工作已经完成,您不必每次用户单击排序时都获取新数据,现在只需添加一个函数来处理用户单击,假设用户点击{{ 1}}命令,您的处理程序应如下所示:
asc
答案 1 :(得分:1)
semantic-ui-react 已支持排序功能。
检查此示例: https://react.semantic-ui.com/collections/table/#variations-sortable
import _ from 'lodash'
import React, { Component } from 'react'
import { Table } from 'semantic-ui-react'
const tableData = [
{ name: 'John', age: 15, gender: 'Male' },
{ name: 'Amber', age: 40, gender: 'Female' },
{ name: 'Leslie', age: 25, gender: 'Female' },
{ name: 'Ben', age: 70, gender: 'Male' },
]
export default class TableExampleSortable extends Component {
state = {
column: null,
data: tableData,
direction: null,
}
handleSort = clickedColumn => () => {
const { column, data, direction } = this.state
if (column !== clickedColumn) {
this.setState({
column: clickedColumn,
data: _.sortBy(data, [clickedColumn]),
direction: 'ascending',
})
return
}
this.setState({
data: data.reverse(),
direction: direction === 'ascending' ? 'descending' : 'ascending',
})
}
render() {
const { column, data, direction } = this.state
return (
<Table sortable celled fixed>
<Table.Header>
<Table.Row>
<Table.HeaderCell
sorted={column === 'name' ? direction : null}
onClick={this.handleSort('name')}
>
Name
</Table.HeaderCell>
<Table.HeaderCell
sorted={column === 'age' ? direction : null}
onClick={this.handleSort('age')}
>
Age
</Table.HeaderCell>
<Table.HeaderCell
sorted={column === 'gender' ? direction : null}
onClick={this.handleSort('gender')}
>
Gender
</Table.HeaderCell>
</Table.Row>
</Table.Header>
<Table.Body>
{_.map(data, ({ age, gender, name }) => (
<Table.Row key={name}>
<Table.Cell>{name}</Table.Cell>
<Table.Cell>{age}</Table.Cell>
<Table.Cell>{gender}</Table.Cell>
</Table.Row>
))}
</Table.Body>
</Table>
)
}
}
答案 2 :(得分:0)
要实现此行为,必须对回送使用“订单过滤器”:https://loopback.io/doc/en/lb3/Order-filter.html
因此,“ id”字段上的过滤器应如下所示:
过滤器:{“ where”:{},“ order”:[“ id ASC”],“ limit”:15,“ skip”:0}
过滤器:{“ where”:{},“ order”:[“ id DESC”],“ limit”:15,“ skip”:0}