Re: Struts2 - Validating several fields depending on values of other fields

[Laurie Harper <la...@holoweb.net>]

Dirk Schumacher wrote:
> I know it would be solveable by the @FieldExpressionValidator where its 
> expression can be filled with a complex OGNL-Expression.
> But if evaluating the expression internally throws an Exception, the 
> evaluation does not terminate right. (I'd be fine with a negative 
> validation
> and re-jecting to the input page, but if the OGNL is not evaluateable it 
> passes the validation)

The expression shouldn't be so complicated; you're just comparing two 
dates, after all. And why would the OGNL expression throw an exception? 
The only issue I would expect is with one or both dates being null, 
which you can avoid using a 'required' validator.

I would think working through any issues with this approach would be a 
lot less pain than going for a custom validator in this case.

L.


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