[Mahar Prasetio]

Scenario : I want to Qty field that already inserted to the database and not going to change the Qty value. Before update it return a Total field.
Here code in controller

$crud = new grocery_CRUD();

	 $crud->set_theme('datatables');

	 $crud->where('HeaderId', $headerid);

	 $crud->set_table('trpurchasingdetail');

	 $crud->field_type('HeaderId', 'hidden' , $headerid)

			 ->field_type('Total', 'invisible');

	 $crud->set_relation('productId', 'msproduct', 'productName');

	 $crud->set_subject('Price');

	 $crud->display_as('PriceCurrency', 'Price')

			 ->display_as('productId', 'Product Name')

			 ->display_as('DetailRemarks', 'Detail Product')

			 ->display_as('UnitType', 'U/M');

	 $crud->fields('PriceCurrency','Qty');

	 $crud->unset_columns('HeaderId')

			 ->unset_add()

			 ->unset_delete()

			 ->unset_print()

			 ->unset_export();

	 $crud->callback_before_update(array($this->transaction, 'totalPrice'));

	 $output = $crud->render();

	 $output->hasil = $this->db->query("SELECT Number FROM trpurchasingheader

		 WHERE Id = '$headerid'")->row();

	 $output->type = "Order No";

	 $output->link = "index.php/purchasing/transaction";

	 $output->direct = "Purchasing List";

	 $this->load->view('listproduct', $output);

And this the function that will be called before update

	function totalPrice($post_array, $primary_key) {

		$harga = $post_array['PriceCurrency'];

		$qty = $post_array['Qty'];

		$post_array['Total'] = $harga * $qty;

		return $post_array;

	}

I've try this function with callback_before_insert and it works perfectly, but when I use this function with callback_before_update it not return any value.

Sorry for my bad english

SOLVED Sorry