T5 : How to solve the following problem when update the Integer or Double value In tapestry 5.0.6 ?

How to solve the following problem when update the Integer or Double value In tapestry 5.0.6 ?When I clean the value of a field whose value is 5 int example = 5;Then press the sumbit botton . It's displaying 0 and send 0 to the database.How can I do If I want Textfield to display nothing and

T5 : How can upate a property just in grid

Hi,I have this page that want to update a boolean field in the gird directly.But a wrong message was reported.Here is the .tml file: How can Ith solve is problem? Thanks _ Invite your mail contacts to join your friends list with