Hi Volker! I'm currently implementing a Web-GUI for an application generated from a UML-meta-model. To model a 1:n or m:n relationship (general associations or compositions), I use a table, and additional Add- and Remove buttons. Now there are constraints on the association ends, like X must have at least a and at most b relations to Y, when committing. Thus the table needs to be validated.
I went for Mike's approach, generating a hidden input field below each table and a error message above. In the bean I needed to generate an additional getXXXSize method, because I didn't know how to reference the size method of the list using EL. It works :-) Thanks everyone! Navid Volker Weber wrote: > Hello, > > i don't understand your intention. > > The purpose of a validator is to validate user input. Correct me if i'm > wrong, but as i know it isn't possible for the user to change the > rowcount of a datatable on client side. So what did you want to validate? > > regards > Volker > > >>> Hello Everyone! >>> >>> I see, that custom validators are used together with >>> EditableValueHolders. I need to test weather the number of rows in a >>> DataTable matches a given constraint. Is there any way to add a >>> Validator to a DataTable? >>> >>> Cheers, >>> Navid
