Balazs Michnay wrote:
Dear Struts Users,
I have a form with 13 form controls on it. I'd like to use the Struts
Validation Framework to validate it, but it's acting weird.
What I'd like to do is to have AT LEAST ONE of the controls filled, but the test of
"validWhen" only allows simple boolean expressions.
I used a simple approach of checking each control for their value being null
but the test cannot containmore than one boolean operator.
For instance, the following works just fine:
test
((*this* != null) or (suly != null))
But if I insert another control test, I get an error message saying "ValidWhen Error
for field ' magassag' - line 1:37: expecting RPAREN, found 'or'", so no more than
two conditions are allowed in a test.
Is that true? Is there any way to create complex tests? Or is there a way to
validate the form for having at least one field filled?
The grammar for validwhen expressions is rather limited; you can only
have one operator per group. The solution is to add additional parentheses:
(((*this* != null) or (suly != null)) or ...)/var-value>
L.
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