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




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  Edson Tirelli
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