Hi,

I've set up a ModelAdmin to manage multiple models. Only one of these requires drag-and-drop sorting.

When I add add sorting capability to the ModelAdmin, it complains because the non sorted Model doesn't have a SortOrder field. How can I specify that GridFieldSortableRows is added only to the Model which is to be sorted?

My code is:

class DAdmin extends ModelAdmin {
 
	public static $managed_models = array(
		'PCategory',
		'AItem'
	);
 
	static $url_segment = 'd-admin';
	static $menu_title = 'dAdmin';
    
	public function getEditForm($id = null, $fields = null) {
		$form = parent::getEditForm($id, $fields);
		$cName = $this->sanitiseClassName($this->modelClass);
		$gridField = $form->Fields()->fieldByName($cName);
		$gridField->getConfig()->addComponent(new GridFieldSortableRows('SortOrder'));
		 return $form;
	}    
}

Thanks.
VWD.

It was fairly simple in the end:

class VAdmin extends ModelAdmin {
 
	public static $managed_models = array(
		'PCategory',
		'AItem'
	);
 
	static $url_segment = 'd-admin';
	static $menu_title = 'dAdmin';
    
	public function getEditForm($id = null, $fields = null) {
		$form = parent::getEditForm($id, $fields);

		if ($this->modelClass == 'AItem') {   // add GridFieldSortableRows for AItem GridField only
			$gridField = $form->Fields()->fieldByName($this->sanitiseClassName($this->modelClass));
			$gridField->getConfig()->addComponent(new GridFieldSortableRows('SortOrder'));
		}
		return $form;
	}    
}