create datatables jquery dynamically with parameter from query - php

Question

I use "datatables plugin for jquery" to display the results of a query in mysql.
The user can also select from a dropdown list (dateParam) and a multiselect values (conseiller) that will automatically restrict the results of the query and thus modify the table. Instead of having 5 columns, I have only 3 for example.
This is where I get the following error alert: "... requested unknown parameter 'data.1' (for example) for row 0...".
json result without selecting:
[{"name":"CONSEILLER","data":["cons1","cons2","cons3","TOTAL UNITES"]},{"name":"TOTAL UNITES","data":[1,9,2,12]}]
json result if I select some parameters:
[{"name":"CONSEILLER","data":["cons2","TOTAL UNITES"]},{"name":"TOTAL UNITES","data":[9,9]}]
Here a part of my query :
<?php
include("../dbconfig.php");
if (isset($_GET["dateParam"],$_GET["dateParam2"],$_GET["conseiller"])) {
$SQL = "
...the query...
";
$result = $dbh->prepare($SQL);
$result->execute();
} else {
$SQL = "
...the query....
";
$result = $dbh->prepare($SQL);
$result->execute();
}
$rows = array();
$rows['name'] = 'CONSEILLER';
$rows1 = array();
$rows1['name'] = 'TOTAL UNITES';
while($row = $result->fetch()) {
$rows['data'][] = $row['CONSEILLER'];
$rows1['data'][] = ($row['UNITES']);
}
$result = array();
array_push($result,$rows);
array_push($result,$rows1);
header('Content-type: application/json');
print json_encode($result, JSON_NUMERIC_CHECK); // VERSION PHP >= 5.3.3
?>
Here is a part of my js :
$(document).ready(function() {
var table = $('#dt_actions_rae_conseiller').DataTable({
"paging": false,
"searching": false,
"bInfo": false,
"scrollX": true,
"bProcessing": true,
"bServerSide": true,
"sAjaxDataProp": "",
"sAjaxSource": "../query/query_actions_rae_conseiller_dt.php",
"aoColumns": [
{ "data": "name" },
{ "data": "data.0" },
{ "data": "data.1" },
{ "data": "data.2" },
{ "data": "data.3" },
],
});
});
/**
* Datepicker
*/
$(function() {
var dateParam = "";
$( "#datepicker" ).datepicker({
dateFormat: "yy-mm-dd",
showAnim: 'drop',
//showOn: "button",
//buttonImage: "../icones/calendar.gif",
//buttonImageOnly: true,
onSelect: function(date){
dateParam = date;
}
});
var dateParam2 = "";
$( "#datepicker2" ).datepicker({
dateFormat: "yy-mm-dd",
showAnim: 'drop',
//showOn: "button",
//buttonImage: "../icones/calendar.gif",
//buttonImageOnly: true,
onSelect: function(date){
dateParam2 = date;
}
});
});
/**
* Multiselect
*/
$(function(){
$("#conseiller").multiselect({
//header: 'Choisir conseillers',
minWidth: 160,
checkAllText: 'all',
uncheckAllText: 'no',
noneSelectedText: 'Conseiller',
selectedList: 7,
/* selectedText: function(numChecked, numTotal, checkedItems){
return numChecked + ' of ' + numTotal + ' checked';
}, */
show: ["bounce", 200],
hide: ["explode", 1000]
});
//$('#projet').bind('change', function() {alert('Change'); });
});
/**
* Button
*/
$(function(){
$('button').click(function() {
var d1 = $("#datepicker").val();
var d2 = $("#datepicker2").val();
var d3 = $("#conseiller").val().join(",");
$.ajax({
url: "../query/query_actions_rae_conseiller_dt.php",
//data: {dateParam:d1, dateParam2:d2},
type: "get",
dataType: "json",
success: function(json){
table = $('#dt_actions_rae_conseiller')
.on('preXhr.dt', function ( e, settings, data ) {
data.dateParam = d1
data.dateParam2 = d2
data.conseiller = d3
})
.DataTable({
"destroy": true, // TO REINITIALISE DATATABLE
"paging": false,
"searching": false,
"bInfo": false,
"scrollX": true,
"bProcessing": true,
"bServerSide": true,
"sAjaxDataProp": "",
"sAjaxSource": "../query/query_actions_rae_conseiller_dt.php",
"aoColumns": [
{ "data": "name" },
{ "data": "data.0" },
{ "data": "data.1" },
{ "data": "data.2" },
{ "data": "data.3" },
],
});
} // end ajax function
}); // end ajax
}); // end click function
}); // end function
and my php:
<table id="dt_actions_rae_conseiller" class="table table-striped table-bordered" cellspacing="0" width="100%">
<thead> // not needed ?
<tr> // not needed ?
<th></th> // not needed ?
<th></th> // not needed ?
<th></th> // not needed ?
<th></th> // not needed ?
<th></th> // not needed ?
</tr> // not needed ?
</thead> // not needed ?
</table>
Thnaks for all !

Answer 1

Ahem, as Php . net says is not sure to test it whit a rowcount -> http://php.net/manual/en/pdostatement.rowcount.php
Because most databases won't return the number of rows.
Instead you can first run a query A with a count(*) then use a fetchColumn to have in a var the number of rows that will be obtained and then do your loop only if count > 0