Check all checkboxes on the current page only in datatables - php

Question

I need a solution for this. Here is what I am trying to do. I have a datatable that has some values and check boxes in the first columns. What I need is when I select the check box in the header it should select all the values in the current page only. But all the check boxes of all the pages get selected.
I also want that, When I navigate to another page of the datatable, the check box selections of all the previous page should be unchecked including the check box in the header.
Hear is my code:
<?php if($acl->can('view_article')){ ?>
<table id="articles" class="table table-striped table-bordered" cellspacing="0" width="100%">
<thead>
<tr>
<?php if($acl->can('delete_article')){ ?>
<th><input id="select_all_existent" type="checkbox" /></th>
<?php } ?>
<th>Article</th>
<th>Categories</th>
<th>Demographic</th>
<th>Intended Month</th>
<th class="text-right">Word Count</th>
</tr>
</thead>
<tbody>
<?php
foreach($articles as $article) {
$id = $article["id"];
$uid = $article["uid"];
$article_name = $article["article_name"];
$article_file_path = $article["article_file_path"];
$article_category = $article["article_category"];
$article_demographic = $article["article_demographic"];
$article_word_count = $article["article_word_count"];
$intended_month = $article["intended_month"];
$article_created = $article["article_created"];
if(!empty($article_demographic)) {
$article_demographic = implode(", ",$article_demographic);
}
$article_keywords = $article["article_keywords"];
$article_description = $article["article_description"];
$checkbox = in_array($id, $assigned_articles)? " ":"<input type='checkbox' value=".$id." />";
echo "
<tr class='' data-id='$id'>
" ;
if($acl->can('delete_article'))
echo "<td>$checkbox</td>";
if($acl->can('edit_article')){
echo "<td>" . anchor("articles/edit/$id",$article_name.'- '.$article_word_count,"class='notBtn' title=\"$article_description\"") . " </td>";
}else{
echo "<td>$article_name - $article_word_count</td>";
}
echo "
<td>".short_string($article_category)."</td>
<td>".short_string($article_demographic)."</td>
<td> $intended_month </td>
<td align='right'>$article_word_count</td>
</tr>";
}
?>
</tbody>
</table>
<?php } ?>
<script type="application/javascript">
$(document).on( 'init', function ( e, settings ) {
alert( 'Saved page length is: '+ table.state().length );
} );
$(document).ready(function(){
var oTable = $("#articles").DataTable({
"stateSave": true,
"order": [],
"dom": '<"row" <"col-md-12 space" <"datatable-action pull-left"> <"datatable-n pull-right" l > > >rt <"row" <"col-md-6" i > <"col-md-6" p > >',
"columns" : [
<?php if($acl->can('delete_article')){ ?>
{orderable: false, searchable: false},
<?php } ?>
{"width": "25%" },
null,
null,
{"width": "12%" },
{"width": "10%" },
],
"fnDrawCallback": function( oSettings ) {
$('.popupArticle').viewArticle({
url : '<?=site_url("articles/showArticleInPopup");?>',
title : 'Article Preview',
size : 'lg'
});
}
});
$('#search-inp').on('keyup',function(){
oTable.search($(this).val()).draw() ;
})
if(oTable.state().length != 0)
$('#search-inp').val(oTable.state().search.search);
checkAllCheckbox(oTable);
var deletebtn = '';
<?php if($acl->can('delete_article')){ ?>
var deletebtn = '<i class="fa fa-trash-o"></i>';
<?php } ?>
var assignbtn = '';
<?php if($acl->can('assign_article')){ ?>
var assignbtn = '<i class="fa fa-paperclip"></i>';
<?php } ?>
$("div.datatable-action").html(deletebtn + ' ' +assignbtn);
$('#assignbtn').on('click', function (e) {
e.preventDefault();
eModal.setEModalOptions({loadingHtml : ''});
eModal.iframe('<?= site_url("assignArticles/e/"); ?>', 'Assign Article').then(function (input) {
$('.modal-dialog', window.document).css('width', '80%');
if ($('.modal-footer', window.document).length == 0) {
$('.modal-content', window.document).append('<div class="modal-footer"> </div>');
}
});
});
});
</script>
Here is the code for checkAllCheckbox(oTable);
function checkAllCheckbox(oTable) {
/* Check all in Datatable*/
if ($("#select_all_existent").length != 0) {
var cells = oTable.cells().nodes();
$("#select_all_existent").change(function () {
$(cells).find(":checkbox").prop("checked", $(this).is(":checked"));
});
$(cells).find(":checkbox").change(function(){
if(!$(this).is(":checked")){
$("#select_all_existent").prop("checked", $(this).is(":checked"));
}
else{
if ($(cells).find(":checkbox").length == $(cells).find(":checked").length) {
$("#select_all_existent").prop("checked",true);
}
}
if ($(cells).find(":checked").length > 0) {
$(oTable.table().container()).siblings().find('.help- block').html('');
}
else{
$(oTable.table().container()).siblings().find('.help- block').html('Please select at least one checkbox');
}
});
}
}
Any help on the scenarios that I have mentioned would be appreciated.

Answer 1

In your code made the following changes and try:
change 1: disable sorting of checkbox column
<thead>
<tr>
<?php if($acl->can('delete_article')){ ?>
<th data-orderable="false"><input id="select_all_existent" type="checkbox" /></th>
<?php } ?>
<th>Article</th>
<th>Categories</th>
<th>Demographic</th>
<th>Intended Month</th>
<th class="text-right">Word Count</th>
</tr>
</thead>
change 2:
add the following code to script:
$('#articles').on('page.dt', function() {
$('#select_all_existent').prop("checked", 0);
$('#select_all_existent').trigger('change');
});
$('#articles').on('length.dt', function() {
$('#select_all_existent').prop("checked", 0);
$('#select_all_existent').trigger('change');
});
$('#select_all_existent').on('change',function () {
checkAllCheckbox(oTable);
});