[REFACTORING] Static database reset

migration/18.04/migratePriorities.php

@@ -46,9 +46,7 @@ foreach ($customs as $custom) {
             }
         }
 
-        if (!empty($db)) {
-            $db->reset();
-        }
+        \SrcCore\models\DatabasePDO::reset();
 
         $db = new \SrcCore\models\DatabasePDO(['customId' => $custom]);
         foreach ($priorities as $key => $priority) {

migration/18.10/migrateConvertedPdf.php

@@ -15,9 +15,7 @@ foreach ($customs as $custom) {
         continue;
     }
 
-    if (!empty($db)) {
-        $db->reset();
-    }
+    \SrcCore\models\DatabasePDO::reset();
 
     $db = new \SrcCore\models\DatabasePDO(['customId' => $custom]);
 

src/core/models/DatabasePDO.php

@@ -191,7 +191,7 @@ class DatabasePDO
         return ['where' => $where, 'limit' => $limit];
     }
 
-    public function reset()
+    public static function reset()
     {
         self::$pdo = null;
         self::$preparedQueries = [];