cjd-parkball/src/components/select/demo/select-users.md

> 中后台业务组件库，中后台就像公园，进入需要买门票（登录），所以以 Parkball(公园球) 命名，公园内必定捕获！作为一个组件库，提供使用方法文档，方便开发者的调用

---
category: 22
title: 搜索用户
title_en: Search and Select Users
---

 zh-CN

一个带有远程搜索，节流控制，请求时序控制，加载状态的多选示例。

 en-US

A complete multiple select sample with remote search, debounce fetch, ajax callback order flow, and loading state.

````jsx
import { Select, Spin } from 'parkball';
import debounce from 'lodash/debounce';

const Option = Select.Option;

class UserRemoteSelect extends React.Component {
  constructor(props) {
    super(props);
    this.lastFetchId = 0;
    this.fetchUser = debounce(this.fetchUser, 800);
  }

  state = {
    data: [],
    value: [],
    fetching: false,
  }

  fetchUser = (value) => {
    console.log('fetching user', value);
    this.lastFetchId += 1;
    const fetchId = this.lastFetchId;
    this.setState({ data: [], fetching: true });
    fetch('https://randomuser.me/api/?results=5')
      .then(response => response.json())
      .then((body) => {
        if (fetchId !== this.lastFetchId) { // for fetch callback order
          return;
        }
        const data = body.results.map(user => ({
          text: `${user.name.first} ${user.name.last}`,
          value: user.login.username,
        }));
        this.setState({ data, fetching: false });
      });
  }

  handleChange = (value) => {
    this.setState({
      value,
      data: [],
      fetching: false,
    });
  }

  render() {
    const { fetching, data, value } = this.state;
    return (
      <Select
        mode="multiple"
        labelInValue
        value={value}
        placeholder="Select users"
        notFoundContent={fetching ? <Spin size="small" /> : null}
        filterOption={false}
        onSearch={this.fetchUser}
        onChange={this.handleChange}
        style={{ width: '100%' }}
      >
        {data.map(d => <Option key={d.value}>{d.text}</Option>)}
      </Select>
    );
  }
}

ReactDOM.render(<UserRemoteSelect />, mountNode);
````