Re: [rules-users] Buggy query behavior in drools 5.6 and 6.1-SNAPSHOT ??

Let me see what I can do. XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX Esteban Aliverti - Blog @ http://ilesteban.wordpress.com On Thu, Jan 23, 2014 at 12:18 AM, Davide Sottara <dsotty(a)gmail.com&gt; wrote: > Esteban, I have created a ticket for this with > an explanation of the weird behavior. > > https://issues.jboss.org/browse/DROOLS-414 > > The problem is in QueryElementBuilder line#343. > It's an easy fix but I don't have time for it right now, > could someone look into it? > > Thanks > Davide > > > > On 01/22/2014 06:00 PM, Esteban Aliverti wrote: > > Good catch Davide. I can confirm that not using nested accessors the > query works as expected. > > Regards, > > > XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX > > Esteban Aliverti > - Blog @ http://ilesteban.wordpress.com > > > On Wed, Jan 22, 2014 at 6:57 PM, Davide Sottara <dsotty(a)gmail.com&gt; wrote: > >> Indeed, the use case can be simplified further: >> >> package org.drools.test.bc; >> >> declare Parent >> attribute2 : String >> end >> >> declare Child >> parentId : String >> end >> >> query getChildWithName( String $parentId, Child $child ) >> $child:= Child( parentId == $parentId ) >> >> end >> >> rule "Insert Children" >> when >> then >> Parent p1 = new Parent( "a1" ); >> Child c1p1 = new Child( "1" ); >> >> insert( c1p1 ); >> insert( p1 ); >> >> end >> >> rule "Rule A" >> when >> $p: Parent( $a2 : attribute2 ) >> ?getChildWithName( $p.attribute2, $child;) >> then >> System.out.println("FOUND: "+ $child + " >> " + $child.getParentId() >> + " == " + $p.getAttribute2() + " ??" ); >> end >> >> It has nothing to do with nested objects, @PR or modifications. >> It seems that the culprit is the chained property accessor. >> >> >> Davide >> >> >> >> On 01/22/2014 02:22 PM, Esteban Aliverti wrote: >> >> Hi guys, >> I was writing some rules using backward chaining and found a strange >> behavior. >> I managed to isolate the error in the test project I'm attaching. >> >> In the project I have 2 classes: Parent and Child >> >> Parent: >> * String id >> * String attribute1 >> * String attribute2 >> * List<Child> children >> >> Child: >> * String parentId; >> * String name; >> * String value; >> >> >> In the test I'm creating 1 Parent object with just 1 child and then >> inserting the Parent object into a drools session: >> >> Parent p1 = new Parent(); >> p1.setId("1"); >> p1.setAttribute1("a1"); >> p1.setAttribute2(null); >> >> Child c1p1 = new Child(); >> c1p1.setName("n1"); >> c1p1.setParentId(p1.getId()); >> c1p1.setValue("v1.1"); >> p1.addChild(c1p1); >> >> kSession.insert(p1); >> kSession.fireAllRules(); >> >> >> So far so good. >> The rules I have in my session are the following: >> >> declare Parent >> @propertyReactive >> end >> >> query getChildWithName(String $parentId, String $name, Child $child) >> $child:= Child(parentId == $parentId, name == $name) >> end >> >> rule "Insert Children" >> when >> $p: Parent() @watch(!*) >> $c: Child() from $p.children >> then >> System.out.println("Inserting child "+$c); >> insert($c); >> end >> >> rule "Rule A" >> when >> $p: Parent(attribute2 != null) >> ?getChildWithName($p.attribute2, "n1", $child;) >> then >> System.out.println("FOUND: "+$child+". The attribute 'parentId' of >> this object must have the value '"+$p.getAttribute2()+"'. Does it? >> "+$child.getParentId()+" == "+$p.getAttribute2()+" ??"); >> globalList.add($child); >> end >> >> >> rule "Copy Attribute1 into Attribute2" >> when >> $p: Parent(attribute1 != null, attribute2 == null) >> then >> modify($p){ >> setAttribute2($p.getAttribute1()) >> } >> end >> >> The important part here is 'Rule A' and 'Copy Attribute1 into >> Attribute2'. The latter copies the value of attribute1 to attribute2 for >> any Parent object present in the session. (Note that the parent I'm >> inserting has attribute2 = null). 'Rule A' is then using a query to get a >> Child object that has a parent with id = $p.attribute2 (where $p is a >> previously matched Parent). >> Given that I only have 1 Parent in my session and that its id is '1' I >> don't expect 'Rule A' to be activated/executed. When I modify >> parent.attribute2 in 'Copy Attribute1 into Attribute2' I'm setting its >> value to 'a1'. 'Rule A' (via the query) should then look for a Child with >> parentid = 'a1' and It shouldn't find anything. >> Funny thing is that 'Rule A' activates and fires. The child object that >> is 'returned' by the query has a parentId of '1' so I don't know how this >> behavior is possible. If you take a look at the System.out output you will >> see that the activation makes no sense at all. >> >> Am I doing something wrong in my project? Is this a bug? Is this the >> expected behavior? >> >> Regards, >> >> >> >> XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX >> >> Esteban Aliverti >> - Blog @ http://ilesteban.wordpress.com >> >> >> _______________________________________________ >> 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 >> > > > > _______________________________________________ > 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 >