/**
* Migrate form legacy column set editor.
*
* @return void
*/
private function migrateFromLegacy()
{
if (!$this->database->fieldExists('bootstrap_grid', 'tl_content') && $this->database->fieldExists('columnset_id', 'tl_content')) {
$this->database->query('ALTER TABLE tl_content ADD bootstrap_grid int(10) unsigned NOT NULL default \'0\';');
$this->database->query('UPDATE tl_content SET bootstrap_grid=columnset_id WHERE bootstrap_grid = 0');
}
}