Re: [rules-users] Checking fact "id"

rules are just querries over data, like a database view. Ask yourself this. If you asserted those two objects, A1 and A2, into a database and you had two views V1 and V2. How would you make V1 select A1 and V2 select A2? When you have the answer for that, it'll apply to Drools too. Mark Massi Gmail wrote: ok But i think I do not need to differentiate them. I try to explain it better. I have got a set of "Contract" class Facts. All of them inserted into the working memory. But Just one of them is the "main contract", all the others all "related contracts". So , when i write a rule I need to distinguish between a "main contract" (which is unique along the session) and a "related contract". I should write rules like the followings: *when* * $mc: Contract() from maincontract* *then* * #rule fired over "the" main contract* *end* ** *when* * $rc: Contract() from relatedcontract* *then* * #rule fired over "a" related contract* *end* I think the only solution to do that is to make "maincontract" and "relatedcontracr" globals. But, if I make them globals, then the rule engine will not be notified about their changes and I do want it to be notified about it. Should I make them "globals" and "facts" as well? Can globals be inserted into the WM as well? Is it too horrible? :D Thank u anyway. Massi ----- Original Message ----- *From:* Edson Tirelli <tirelli(a)post.com&gt; *To:* Rules Users List <rules-users(a)lists.jboss.org&gt; *Sent:* Saturday, January 05, 2008 12:00 PM *Subject:* Re: [rules-users] Checking fact "id" What attribute differentiates A1 from A2? Such scenarios usually are solved by an additional constraint... []s Edson 2008/1/4, Massi Gmail < mmquelo(a)gmail.com&gt;: > > > Hi guys, > > Now I am strugglin' with "fact id checking" or whatever we can call > it.... :D > > Let's take into account the followong scenario: > > I have class A (it's just a name) javabeans to be inserted into the WM. > > I define two objects of class A: A1 and A2. > > Somewhere I do "insert(A1)" and "insert(A2)" ( let's say I do it in the > same package of R1 and R2..see below...) > > Then I define two different rules R1 and R2 that reason over class "A" > facts (let's say R1 and R2 are in the same package) . > > The point is.... I want R1 to fire only on A1 and R2 only on A2. > > Is that possible in drools? Is there a sort of "fact id" I can reason > over? > > I do not think globals will be of any help, cause in the guide i have > read that globals should never be used within LHS. > We should never reason over globals. > > Let me know. > > Massi > > > > _______________________________________________ > rules-users mailing list > rules-users(a)lists.jboss.org > https://lists.jboss.org/mailman/listinfo/rules-users > > -- Edson Tirelli JBoss Drools Core Development Office: +55 11 3529-6000 Mobile: +55 11 9287-5646 JBoss, a division of Red Hat @ www.jboss.com ------------------------------ _______________________________________________ rules-users mailing list rules-users(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users ------------------------------ _______________________________________________ rules-users mailing listrules-users@lists.jboss.orghttps://lists.jboss.org/mailman/listinfo/rules-users _______________________________________________ rules-users mailing list rules-users(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users