[rules-users] How to write rules in two fact's fields?

[Swindells, Thomas]

I'd assume the intention was to use the support mvel provides for abbreviating expressions - so it is intended to be interpreted as shorthand for 20 <= price && price < 30. I'm not 100% sure scanning through the docs whether this form is correct or not.

Thomas

> -----Original Message-----
> From: rules-users-bounces at lists.jboss.org [mailto:rules-users-
> bounces at lists.jboss.org] On Behalf Of Wolfgang Laun
> Sent: 05 February 2012 12:22
> To: Rules Users List
> Cc: Rules Dev List
> Subject: Re: [rules-users] How to write rules in two fact's fields?
>
> In most programming languages the result of (e.g.) an integer comparison
>    20 <= price
> is a value of a different type, i.e., boolean, with values "true" or "false". (You
> have heard this at some time, right?) Consequently, the comparison of a
> boolean with an integer
>    true < 30
> depends on whether the language tolerates it, and if so, how that result is
> defined.
>
> IT IS A BUG THAT DROOLS TOLERATES (BUT DOES NOT DEFINE) SUCH
> "MULTIPLE" COMPARISONS BUT DOES NOT FLAG THEM AS AN ERROR OR
> IMPLEMENT THEM IN SOME WAY. (Tested with 5.3.0 Final.)
>
> This means that you'll have to rwrite your constraints using && or ||, as
> appropriate.
>
> -W
>
>
>
>
> On 05/02/2012, shanmuga <shanmugasundaram.t.v at gmail.com> wrote:
> > Hi,
> >    I want to know, how to write rules in two fact's fields?
> >
> > I used two facts, it will take AND condition or OR condition in
> > between the two facts.
> >
> > Please check my code....
> >
> > package Project
> > import com.sample.Person;
> > import com.sample.Price;
> >
> >     rule "rule_Name"
> >         when
> >             per:*Person*(50 <= age < 100, 10000 <= income < 50000,
> > occupation == "Business", category == "Military", location ==
> > "Bangalore", custype ==
> > "Individual")
> >             pri:*Price*((20 <= price < 30) || price == 1)
> >         then
> >             System.out.println("Success");
> >     end
> >
> >
> > The both fact values are satisfy means, what is the output?
> >
> > I got output, even the *Price* fact's value is wrong. (price == 100)
> >
> > Please slove my problem........!!!!
> >
> > --
> > View this message in context:
> > http://drools.46999.n3.nabble.com/How-to-write-rules-in-two-fact-s-fie
> > lds-tp3717063p3717063.html Sent from the Drools: User forum mailing
> > list archive at Nabble.com.
> > _______________________________________________
> > rules-users mailing list
> > rules-users at lists.jboss.org
> > https://lists.jboss.org/mailman/listinfo/rules-users
> >
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