I am trying to add column filters to a server side DataTables.js request (the database its using is huge). When I add the lines from YADCF, I have no functionality of the text boxes. What is the proper way to add column filters to my php file? Currently I have: index.php
<head>
<link rel="stylesheet" type="text/css" href="css/jquery.dataTables.css">
<script type="text/javascript" language="javascript" src="js/jquery.js"></script>
<script type="text/javascript" language="javascript" src="js/jquery.dataTables.yadcf.js"></script>
<script type="text/javascript" language="javascript" src="js/jquery.dataTables.js"></script>
<script type="text/javascript" language="javascript" >
$(document).ready(function() {
'use strict';
var dataTable = $('#employee-grid').DataTable( {
"processing": false,
"serverSide": true,
"ajax":{
url :"employee-grid-data.php", // json datasource
type: "post", // method , by default get
error: function(){ // error handling
$(".employee-grid-error").html("");
$("#employee-grid").append('<tbody class="employee-grid-error"><tr><th colspan="3">No data found in the server</th></tr></tbody>');
$("#employee-grid_processing").css("display","none");
}
}
} );
} );
</script>
<style>
div.container {
margin: 0 auto;
max-width:760px;
}
div.header {
margin: 100px auto;
line-height:30px;
max-width:760px;
}
body {
background: #f7f7f7;
color: #333;
font: 90%/1.45em "Helvetica Neue",HelveticaNeue,Verdana,Arial,Helvetica,sans-serif;
}
</style>
</head>
<body>
<div class="header"></h1></div>
<div class="container">
<table id="employee-grid" cellpadding="0" cellspacing="0" border="0" class="display" width="100%">
<thead>
<tr>
<th>Employee name</th>
<th>Salary</th>
<th>Age</th>
</tr>
</thead> </table> </div></body></html>
and my sql request file: employee-grid-data.php
<?php
/* Database connection start */
$servername = "localhost";
$username = "root";
$password = "";
$dbname = "";
$conn = mysqli_connect($servername, $username, $password, $dbname) or die("Connection failed: " . mysqli_connect_error());
/* Database connection end */
// storing request (ie, get/post) global array to a variable
$requestData= $_REQUEST;
$columns = array(
// datatable column index => database column name
0 =>'employee_name',
1 => 'employee_salary',
2=> 'employee_age'
);
// getting total number records without any search
$sql = "SELECT employee_name, employee_salary, employee_age ";
$sql.=" FROM employee";
$query=mysqli_query($conn, $sql) or die("employee-grid-data.php: get employees");
$totalData = mysqli_num_rows($query);
$totalFiltered = $totalData; // when there is no search parameter then total number rows = total number filtered rows.
$sql = "SELECT employee_name, employee_salary, employee_age ";
$sql.=" FROM employee WHERE 1=1";
if( !empty($requestData['search']['value']) ) { // if there is a search parameter, $requestData['search']['value'] contains search parameter
$sql.=" AND ( employee_name LIKE '".$requestData['search']['value']."%' ";
$sql.=" OR employee_salary LIKE '".$requestData['search']['value']."%' ";
$sql.=" OR employee_age LIKE '".$requestData['search']['value']."%' )";
}
$query=mysqli_query($conn, $sql) or die("employee-grid-data.php: get employees");
$totalFiltered = mysqli_num_rows($query); // when there is a search parameter then we have to modify total number filtered rows as per search result.
$sql.=" ORDER BY ". $columns[$requestData['order'][0]['column']]." ".$requestData['order'][0]['dir']." LIMIT ".$requestData['start']." ,".$requestData['length']." ";
/* $requestData['order'][0]['column'] contains colmun index, $requestData['order'][0]['dir'] contains order such as asc/desc */
$query=mysqli_query($conn, $sql) or die("employee-grid-data.php: get employees");
$data = array();
while( $row=mysqli_fetch_array($query) ) { // preparing an array
$nestedData=array();
$nestedData[] = $row["employee_name"];
$nestedData[] = $row["employee_salary"];
$nestedData[] = $row["employee_age"];
$data[] = $nestedData;
}
$json_data = array(
"draw" => intval( $requestData['draw'] ), // for every request/draw by clientside , they send a number as a parameter, when they recieve a response/data they first check the draw number, so we are sending same number in draw.
"recordsTotal" => intval( $totalData ), // total number of records
"recordsFiltered" => intval( $totalFiltered ), // total number of records after searching, if there is no searching then totalFiltered = totalData
"data" => $data // total data array
);
echo json_encode($json_data); // send data as json format
?>
I tried to combine my datatable function with the YADCF function found at; http://yadcf-showcase.appspot.com/DOM_Ajax_Multiple_1.10.html . However, I could not get the column filters to work. What is the proper syntax for a YADCF server side request? Or are there changes to the jquery.datatables.js or jquery.datatables.yadcf.js that I must make?
I tried to create the variable oTable but still could not the yadcf.init(oTable) to make the text boxes functional. What am I missing?
Thank you for the help.
Please see YADCF - Server side source example. Each column filter sends entered value as
columns[X][search][value], whereXis zero-based column index.So in your example with three columns in the server-side script you will have column filters in the following variables:
$requestData['columns'][0]['search']['value']$requestData['columns'][1]['search']['value']$requestData['columns'][2]['search']['value']You would need to adjust your PHP to take into the account these filters if their content is not an empty string.