*/ public function rules() { return [ 'id' => 'required', 'series' => 'required|string', 'name' => 'required|string', 'name_for_form' => 'required|string', 'product_group' => 'required|string', 'price' => 'required|numeric', 'characteristics' => 'required|string', 'tech_description' => 'required|string', 'tech_description_short' => 'required|string', ]; } }