[rules-users] bug or feature not yet implemented

[Manukyan, Sergey]

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 at lists.jboss.org
[mailto:rules-users-bounces at 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 at 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




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-- 
  Edson Tirelli
  Software Engineer - JBoss Rules Core Developer
  Office: +55 11 3529-6000
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