Hi,
I have a form for editing a business entity. The form is prepopulated with the
current values and the user can change everything and hit the submit button
when their done. Fairly simple. What's tricky is that I'd like to only show a
confirmation ("Changes saved") message if they actually changed something
instead of just submitting the same values as before.
The naïve way is to check each backing bean field against the field in the
business entity, but that's unmaintainable when the object starts changing. Is
there a framework-based way to detect this? I want to avoid having to enumerate
every field when I check. I want to know that _at least one_ of the fields on
the page has a submitted value different from the model value. (I think I got
the terminology right)
Maybe the answer lies in a phase listener that would somehow do that check, my
experience with that is limited. Please let me know if this is possible or not.
And I'm using MyFaces and Trinidad so hopefully it would only use mechanisms
include in those projects.
Thanks
Dan
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