Javascript DataTables - filter() 函数没有按预期工作
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Javascript DataTables - filter() function not working as expected
提问by user985723
I am using the DataTables javscript library and I'm trying to filter a row out based on if a numerical value is greater than 60.
我正在使用 DataTables javscript 库，并且我试图根据数值是否大于 60 来过滤出一行。
I'm trying to follow this example: http://datatables.net/reference/api/filter%28%29
我试图按照这个例子：http: //datatables.net/reference/api/filter%28%29
The filter code looks like this:
过滤器代码如下所示：
table
.column( 3 )
.data()
.filter( function ( value, index ) {
return value > 60 ? true : false;
} )
The problem is all rows are still visible and no filtering has been done at all. Even if my function simply returns false all rows are still visible. What's going on here?
问题是所有行仍然可见，并且根本没有进行过滤。即使我的函数只是返回 false，所有行仍然可见。这里发生了什么？
JSFiddle of example
示例的 JSFiddle
回答by adeneo
The example you're linking to is filtering the returning array of the data from the columns, not the rows themselves.
您链接到的示例是从列中过滤返回的数据数组，而不是行本身。
You can verify this by returning the content and logging it
您可以通过返回内容并记录来验证这一点
var filteredArray = table.column( 3 )
.data()
.filter( function(value, index) {
return value > 60 ? true : false;
})
.draw();
console.log(filteredArray);
This is what the filtermethod does, it filters the data when you return it with data(), not the rows.
这就是该filter方法的作用，它在您返回时过滤数据data()，而不是行。
To filter the rows in place, you'd hook into the DataTables plugin, more specifically $.fn.dataTableExt.afnFiltering, and do something like this
要过滤适当的行，您需要连接到 DataTables 插件，更具体地说$.fn.dataTableExt.afnFiltering，并执行以下操作
$.fn.dataTableExt.afnFiltering.push(
function (oSettings, aData, iDataIndex) {
return aData[3] < 60;
}
);
