'Varchar' ); private static $belongs_many_many = array( 'People' => Person::class ); private static $default_sort = '"Name"'; public function getCMSFields() { $fields = parent::getCMSFields(); // TODO No longer necessary once FormScaffolder uses GridField $fields->replaceField( 'People', GridField::create( 'People', 'People', $this->People(), GridFieldConfig_RelationEditor::create() ) ); return $fields; } }