[rules-users] qualified identifiers in constraints: not commutative?

[Wolfgang Laun]

Try parenthesizing the right hand side but note that you may have to use
getters to access the fields
   $o:Order($o.q > ($o.getB().getMaxQ() ) )

It's possible that using dialect "mvel" might be a way to avoid using the
getX() instead of x.

-W


On 31 December 2010 17:30, Michael Whidden <mwhidden at thebluew.com> wrote:

> At Mr. Legendre's suggestion, I removed the $o from my constraints, but
> with the same result: (b.maxQ < q) works, but (q > b.maxQ) fails. I get
> the error:
> "Unable to create restriction '[QualifiedIndentifierRestr: < b.maxQ ]'
> for field 'quantity' in the rule 'MaxQty'"
>
>
>
> On 12/30/2010 2:32 PM, Michael Whidden wrote:
> > I notice an unexpected behavior when creating a technical DRL in Guvnor.
> >
> > If I have a fact with a sub-fact, then binary operators don't seem to be
> > commutative.
> >
> > Eg.,
> >
> > declare Broker
> > maxQ: Integer
> >
> > declare Order
> > q: Integer
> > b: Broker
> >
> > The rule
> > $o:Order($o.b.maxQ < $o.q)
> > validates fine, but
> > $o:Order($o.q > $o.b.maxQ)
> > returns an error "Unable to create restriction
> > '[QualifiedIndentifierRestr: > $o.broker.maxQ ]' for field '$o.q' in the
> > rule"
> >
> > I'm new, so I want to make sure I'm not missing something obvious here...
>
> _______________________________________________
> rules-users mailing list
> rules-users at lists.jboss.org
> https://lists.jboss.org/mailman/listinfo/rules-users
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.jboss.org/pipermail/rules-users/attachments/20101231/3e53b445/attachment.html