Thanks Edson for workaround,

IMHO that looks like a limitation to me, is there a particular reason why left side should always be a field?

-Sergey

---

From: rules-users-bounces@lists.jboss.org [mailto:rules-users-bounces@lists.jboss.org] On Behalf Of Edson Tirelli
Sent: Friday, August 10, 2007 11:58 AM
To: Rules Users List
Subject: Re: [rules-users] bug or feature not yet implemented

   Sergey,

   That is how it is supposed to work. A field constraint in Drools always has a field at its left side. If you want arbitrary expression, just embed it in an inline eval:

        S : Supplier(
                $sts  : supplierBusinessStatus.businessStatus,
                $csts : corporateSupplier.supplierBusinessStatus.businessStatus,               
                eval ( $sts != $csts ) 
        )

   Although, for this specific case, it would be better (more performatic) to simply write:

        S : Supplier(
                $sts  : supplierBusinessStatus.businessStatus,
                $csts : corporateSupplier.supplierBusinessStatus.businessStatus != $sts
        )

    []s
    Edson

2007/8/10, Manukyan, Sergey <SManukyan@lear.com>:

Folks,

I found that drools 4.0GA doesn't recognize variables in the left side
of operator expression

Like this produces error:


When
        S : Supplier(
                $sts  : supplierBusinessStatus.businessStatus ,
                $csts :
corporateSupplier.supplierBusinessStatus.businessStatus,
                $sts != $csts
                )
Then
        ...



It tries to treat the $sts variable as a field of Supplier, instead
understanding that it is a variable declared earlier,

Please advise,

Thanks,

-Sergey




**********************
** LEGAL DISCLAIMER **
**********************

This E-mail message and any attachments may contain
legally privileged, confidential or proprietary
information. If you are not the intended recipient(s),
or the employee or agent responsible for delivery of
this message to the intended recipient(s), you are
hereby notified that any dissemination, distribution
or copying of this E-mail message is strictly
prohibited. If you have received this message in
error, please immediately notify the sender and
delete this E-mail message from your computer.

_______________________________________________
rules-users mailing list
rules-users@lists.jboss.org
https://lists.jboss.org/mailman/listinfo/rules-users

--
  Edson Tirelli
  Software Engineer - JBoss Rules Core Developer
  Office: +55 11 3529-6000
  Mobile: +55 11 9287-5646
  JBoss, a division of Red Hat @ www.jboss.com