此脚本的目的是首先将数据源加载到表中，
然后有一个搜索框来搜索数据。
dataSource仅在第一次加载页面时加载，
如何让它每30秒重新加载一次数据源，谢谢
<TableSorter dataSource={"/welcome/get_winner_list"} config={CONFIG} />
这是整个脚本
/** @jsx React.DOM */
var CONFIG = {
sort: { column: "_id", order: "desc" },
filterText: "",
columns: {
_id: { name: "獎次"},
name: { name: "獎品"},
can_accept_prize_now: { name: "現領"},
staff_name: {name: "姓名"},
staff_id: {name: "工號"},
}
};
var TableSorter = React.createClass({
getInitialState: function() {
return {
items: this.props.initialItems || [],
sort: this.props.config.sort || { column: "", order: "" },
columns: this.props.config.columns,
filterText:this.props.config.filterText
};
},
componentWillMount: function() {
this.loadData(this.props.dataSource);
},
loadData: function(dataSource) {
if (!dataSource) return;
$.get(dataSource).done(function(data) {
console.log("Received data");
this.setState({items: data});
}.bind(this)).fail(function(error, a, b) {
console.log("Error loading JSON");
});
},
handleFilterTextChange: function (event){
this.setState({filterText:event.target.value})
},
editColumnNames: function() {
return Object.keys(this.state.columns);
},
receive_click:function(event){
name_staff=event.target.name.split(',')
dataSource='/take/'+name_staff[0]+'/'+name_staff[1];
$.getJSON(dataSource).done(function() {
console.log("Input success");
}.bind(this)).fail(function(error, a, b) {
console.log("Error :Input Prize");
});
itemsColumn=_.find(this.state.items,function(column){return column['_id']==name_staff[0]});
itemsColumn['taken_at']=true;
this.setState()
},
render: function() {
var rows = [];
var columnNames = this.editColumnNames();
var filters = {};
columnNames.forEach(function(column) {
var filterText = this.state.filterText;
filters[column] = null;
if (filterText.length > 0 ) {
filters[column] = function(x) {
if(x)
return (x.toString().toLowerCase().indexOf(filterText.toLowerCase()) > -1);
};
}
}, this);
var filteredItems = _.filter(this.state.items, function(item) {
return _.some(columnNames, function(c) {
return (!filters[c] || filters[c](item[c]));
}, this);
}, this);
var sortedItems = _.sortBy(filteredItems, this.state.sort.column);
if (this.state.sort.order === "desc") sortedItems.reverse();
var cell = function(x) {
return columnNames.map(function(c) {
if (c == 'taken_at') {
if (x[c])
return <td>
<span className="btn btn-shadow btn-danger" disabled="disabled">已領取</span>
</td>;
else
return <td>
<button name={x['_id']+','+x['staff_id']} className="btn btn-shadow btn-success" onClick={this.receive_click}>未領取</button>
</td>;
}
else if (c == 'can_accept_prize_now') {
if (x[c] )
return <td>
<img src="/images/check.png"></img>
</td>;
else
return <td>
<img src="/images/cross.png"></img>
</td>;
}
else
return <td>{x[c]}</td>;
}, this);
}.bind(this);
sortedItems.forEach(function(item) {
rows.push(
<tr key={item.id}>
{ cell(item) }
</tr>
);
}.bind(this));
var header = columnNames.map(function(c) {
return <th >{this.state.columns[c].name}</th>;
}, this);
return (
<div className="table">
<form>
<fieldset>
<input type="text" name="s" id="s" placeholder="搜尋方式：部分工號、部分姓名、部分獎次，皆可查詢。 Eg: 林 or 726 "
value={this.state.value} onChange={this.handleFilterTextChange}/>
</fieldset>
</form>
<p/>
<table cellSpacing="0" className="table table-striped table-advance table-hover prizes">
<thead>
<tr>
{ header }
</tr>
</thead>
<tbody>
{ rows }
</tbody>
</table>
</div>
);
}
});
var QueryString = function () {
// This function is anonymous, is executed immediately and
// the return value is assigned to QueryString!
var query_string = {};
var query = window.location.search.substring(1);
var vars = query.split("&");
for (var i=0;i<vars.length;i++) {
var pair = vars[i].split("=");
// If first entry with this name
if (typeof query_string[pair[0]] === "undefined") {
query_string[pair[0]] = pair[1];
// If second entry with this name
} else if (typeof query_string[pair[0]] === "string") {
var arr = [ query_string[pair[0]], pair[1] ];
query_string[pair[0]] = arr;
// If third or later entry with this name
} else {
query_string[pair[0]].push(pair[1]);
}
}
return query_string;
} ();
var App = React.createClass({
render: function() {
return (
<div>
<TableSorter dataSource={"/welcome/get_winner_list"} config={CONFIG} />
</div>
);
}
});
$( document ).ready(function() {
console.log( "ready!" );
if(document.getElementById("searchWinner")){
React.render(<App />, document.getElementById("searchWinner"));
}
});
我得到了Uncaught TypeError: Cannot read property 'interval' of null
通过以下代码
getInitialState: function() {
return {
interval: 5,
items: this.props.initialItems || [],
sort: this.props.config.sort || { column: "", order: "" },
columns: this.props.config.columns,
filterText:this.props.config.filterText
};
},
componentDidMount: function() {
setInterval(function() {
this.setState({
interval: this.state.interval + 1
});
}.bind(this), 1000);
},
componentWillMount: function() {
this.loadData(this.props.dataSource);
},
var App = React.createClass({
render: function() {
return (
<div>
<TableSorter key={this.state.interval} dataSource={"/welcome/get_winner_list"} config={CONFIG} />
</div>
);
}
});
答案 0 :(得分：0)
我认为TableSorter是外部组件，因此我建议使用父组件中的key属性强制组件重新呈现。像
componentDidMount: function() {
setInterval(function() {
this.setState({
interval: this.state.interval + 1
});
}.bind(this), 1000);
},
render: function() {
return <TableSorter key={this.state.interval} dataSource={"/welcome/get_winner_list"} config={CONFIG} />
}
减号会在间隔后重置TableSorter（分页，选定行）内的任何状态。
答案 1 :(得分：-2)
我可以使用这个脚本：
setInterval(function() {
alert("alert every 3 second");
}, 3000);