setting render to false updates fields with empty values

[builderdash]

I have a mvc generated view and I want some fields not be displayed when updating the entry.
So I set the render attribute of the field:input tag to false

        <field:input field="login" id="c_test_domain_Account_login" z="user-managed" render="false"/>

All test work as expected, so I ran the application in jetty with mvn jetty:run.
I added some entries for Client and aAcount.
After updating an entry of Account the value of the field login becomes empty. That is not the desired behavior. I justed wanted the value not to be changed.

I added the roo script, where I only changed the render attribute of the login field mentioned above in
${PROJECT_HOME}/src/main/webapp/WEB-INF/views/accounts/update.jspx

[builderdash]

Okay I found a way to fix this
http://forum.springsource.org/showthread.php?p=351683

But I think it could be a nice improvment to roo to change the behavior of the render attribute. Setting a display option should not effect the data.