Re: [rules-users] qualified identifiers in constraints: not commutative?
Thank you! That fixes it, without using getter methods. So did I make a
mistake, or is this a workaround for a bug?
These work:
$o:Order(q > (b.maxQ))
$o:Order($o.q > ($o.b.maxQ))
$o:Order(b.maxQ > q)
$o:Order($o.b.maxQ > $o.q)
These don't:
$o:Order(q > b.maxQ)
$o:Order($o.q > $o.b.maxQ)
Is this proper behavior, or a bug? I can't find anything in the docs
that describes the parens as required when a qualified identifier
appears on the right side of a binary operator in a constraint.
On 12/31/2010 11:47 AM, Wolfgang Laun wrote:
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(a)thebluew.com
<mailto:mwhidden@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...
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