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changes how the pagination is done in the DB_Model

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SimonGschnell
2024-04-17 14:23:09 +02:00
parent 36c8862b99
commit c017014171
7 changed files with 120 additions and 33 deletions
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application/core/DB_Model.php
+45 -1
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@@ -32,6 +32,9 @@ class DB_Model extends CI_Model
protected $pk; // Name of the PrimaryKey for DB-Update, Load, ...
protected $hasSequence; // False if this table has a composite primary key that is not using a sequence
// True if this table has a primary key that uses a sequence
//protected $paginationOptions; // $page and $page_size together in an associative array
protected $page;
protected $page_size;
private $executedQueryMetaData;
private $executedQueryListFields;
@@ -484,7 +487,7 @@ class DB_Model extends CI_Model
if (!is_numeric($start) || (is_numeric($start) && $start <= 0))
return error('The start parameter is not valid', EXIT_MODEL);
if (is_numeric($end) && $end > $start)
if (is_numeric($end))
{
$this->db->limit($start, $end);
}
@@ -1073,5 +1076,46 @@ class DB_Model extends CI_Model
return $udfs;
}
function addPagination( $page, $page_size, $maxPageCount=null)
{
if (isset($page) && is_numeric($page) && isset($page_size) && is_numeric($page_size) && $page > 0 && $page_size > 0) {
if (isset($maxPageCount) && is_numeric($maxPageCount) && $maxPageCount > 0) {
$floatMaxPageCount = $maxPageCount / $page_size;
$floatMaxPageCount = ceil($floatMaxPageCount);
if($page > $floatMaxPageCount){
$page = $floatMaxPageCount;
}
}
// else if page is to big
$offset = (($page-1) * $page_size);
$this->addLimit($page_size, $offset);
} else {
$this->addLimit($page_size);
}
}
function getMaxPageCount( $page_size, $params=null )
{
// we clone the original query, so we dont have to change the origial query
$instance_copy = clone $this;
$db_copy = clone $this->db;
$countSql = $db_copy->get_compiled_select($instance_copy->dbTable,false);
$countSql = "SELECT COUNT(*) FROM (". $countSql .") as count;";
// calculating the maxPageCount and adding the pagination to the query
$num_rows_query_result = $instance_copy->execReadOnlyQuery($countSql, $params);
if(isError($num_rows_query_result)){
return error($this->db->error(), EXIT_DATABASE);
}
$num_rows = getData($num_rows_query_result)[0]->count;
// ceil, to include remaining rows into the last page
return $num_rows;
}
}