Left hand side of a constraint must always be a field name. If you need expression there, either do what wolfgang suggested or wrap the whole thing in an eval().

   []s
   Edson

2009/10/2 Greg Barton <greg_barton@yahoo.com>
Try wrapping it in parentheses:

A ($b:b, $c:c, ($b/$c) <=105)



----- Original Message ----
From: skasab2s <skasab2s@smail.inf.fh-brs.de>
To: rules-users@lists.jboss.org
Sent: Friday, October 2, 2009 10:20:52 AM
Subject: [rules-users]  Division Operator in a Rule Condition


Hello guys,

I have this problem:

I have an object A with fields b and c. I have to check if b/c <= 105 (if
the division of the both fields is less than 105).

When I try the condition  A ($b:b, $c:c, $b/$c <=105), I get the error
message "No viable alternative for /".

How to check this one correctly in a rule condition?

Thanks a lot for any ideas!

skasab2s


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 Edson Tirelli
 JBoss Drools Core Development
 JBoss by Red Hat @ www.jboss.com