javascript - reactjs中的搜索功能
问题描述
import React, { PropTypes } from 'react';
import { Link, browserHistory } from 'react-router';
import * as DataConnectionAction from '../../actions/dataconnectionAction.jsx';
import DataConnectionStore from '../../store/dataconnectionstore.jsx';
class DataSource extends React.Component {
constructor(props) {
super(props);
this.state = {
datasourcelist: [],
};
this._dataconnectionStoreChange = this._dataconnectionStoreChange.bind(this);
}
componentWillMount() {
DataConnectionStore.on('change', this._dataconnectionStoreChange);
}
componentWillUnmount() {
DataConnectionStore.removeListener('change', this._dataconnectionStoreChange);
}
componentDidMount() {
DataConnectionAction._getDataSourcesList();
}
_dataconnectionStoreChange(type) {
if (type == 'DataSourcesList') {
let datasourcelist = DataConnectionStore._getDataSourceList() || {};
this.setState({ datasourcelist: datasourcelist.dataconnections });
}
}
DataSourceView(el) {
let data = {
id: el.dataConnectionName
}
}
_handleSearchChange(e) {
let value = e.target.value;
let lowercasedValue = value.toLowerCase();
let datasourcedata = this.state.datasourcelist;
let datasourcelist = datasourcedata && datasourcedata.filter(el => el.dataConnectionName.toLowerCase().includes(lowercasedValue));
this.setState({ datasourcelist });
}
DataSourcesCardUI() {
let datasourcedata = this.state.datasourcelist;
return (
datasourcedata && datasourcedata.map((el) =>
<div key={el.key}>
<div className="col-md-3 topadjust">
<div className="panel panel-default datasource_panel ">
<div className="panel-heading">
<h5 className="panel_title"><i className="fa fa-database"></i> {el.dataConnectionName}</h5>
</div>
<Link className="panel-body" onClick={this.DataSourceView.bind(this, el)}>
<div className="datasource_txt text-center">
<h6>{el.databaseHost}</h6>
<h6>{el.dataConnectionType} </h6>
<p>{el.createdDate}</p>
</div>
</Link>
</div>
</div>
</div>
)
);
}
render() {
return (
<div>
<section className="content_block">
<div className="container-fluid">
<div className="row dashboard_list">
{this.DataSourcesCardUI()}
</div>
</div>
</section>
</div>
);
}
}
export default DataSource;
在这里,我遇到了一个问题,即我可以根据 dataConnectionName 进行过滤,但是当我尝试通过更改名称进行过滤时,它是从第一个过滤器数组数据中过滤的。
但是,如果我删除并再次输入,我需要根据数据数组进行过滤。
示例:当我尝试使用搜索时,Cu
我得到了正确的结果。但是当我再次删除Cu
并搜索User
它不是从数据数组中搜索它是从过滤器数组数据中搜索时。而不是当我删除并使用其他键搜索时,它应该从data
数组中过滤掉。
请指导我做错了什么。
解决方案
您可以保留一个单独的数组,在其中放置与搜索匹配的所有元素,而不是覆盖您所在州的数据。
例子
let data = [
{
dataConnectionName: "Customer_Details",
dataConnectionType: "NO_SQL",
databaseHost: "17.8.10.26",
pluginName: "AGT1_Customer_Details",
createdDate: "2018-09-23",
createBy: "Admin"
},
{
dataConnectionName: "User_Details",
dataConnectionType: "NO_SQL",
databaseHost: "17.8.10.26",
pluginName: "AGT1_Customer_Details",
createdDate: "2018-09-24",
createBy: "Admin"
},
{
dataConnectionName: "Manager_Details",
dataConnectionType: "NO_SQL",
databaseHost: "17.8.10.26",
pluginName: "AGT1_Customer_Details",
createdDate: "2018-09-25",
createBy: "Admin"
},
{
dataConnectionName: "Director_Details",
dataConnectionType: "NO_SQL",
databaseHost: "17.8.10.26",
pluginName: "AGT1_Customer_Details",
createdDate: "2018-09-26",
createBy: "Admin"
}
];
// Give each element a unique id that is used as key
data.forEach(el => el.id = Math.random());
class App extends React.Component {
state = {
data,
filteredData: data
};
_handleSearchChange = e => {
const { value } = e.target;
const lowercasedValue = value.toLowerCase();
this.setState(prevState => {
const filteredData = prevState.data.filter(el =>
el.dataConnectionName.toLowerCase().includes(lowercasedValue)
);
return { filteredData };
});
};
render() {
const { filteredData } = this.state;
return (
<div>
<input onChange={this._handleSearchChange} placeholder="Search"/>
{filteredData.map(el => (
<div key={el.key}>
<div>
{el.dataConnectionName} - {el.pluginName} - {el.createdDate} - {el.createBy}
</div>
</div>
))}
</div>
);
}
}
ReactDOM.render(<App />, document.getElementById("root"));
<script src="https://cdnjs.cloudflare.com/ajax/libs/react/15.1.0/react.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/react/15.1.0/react-dom.min.js"></script>
<div id="root"></div>
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