Data binding issue String -> Domain Object

[peterg]

I am new to alot of the technologies employed behind the scene so I will begin with what I am trying to achieve.

I want to supply a Form with a current setting from the form backing object, but have it be immutable. Upon submission of the form I want to reference the original object supplied to the update form.

What is happening is that I can get the update form to display the object settings, but upon submission it is coming across as null with a BindingResults error with the error being String -> Object type conversion error. This will work if I bind the property to a form:select/option pair. I took that model from the autogenerated code from Roo.

My research points to the potential need of a custom DataBinder but I am unsure of whether or not that is necessary or how to approach doing that within the generated code.

Thanks,

-Pete G

[Andrew Swan]

Just tell the existing binder to ignore that field, by adding this method to the controller:

@InitBinder
public void canBeCalledAnything(WebDataBinder binder) {
    binder.setAllowedFields(...);  // leave out the immutable one
}