Very strange. The facts are passed into the WM by-reference. Therefore the query should
work after calling the person.setClassName("Math") on the fact. And this should
work without calling the insert or update.
This leaves me guessing that the query does not work on the facts directly, instead they
work on shadow facts.
________________________________
From: rules-users-bounces(a)lists.jboss.org
To: Rules Users List
Sent: Thu Sep 11 04:41:37 2008
Subject: [rules-users] Update vs insert
Hello,
What is the difference between calling insert and update in a rule file? When I use
insert my queries don’t work, but if I use update they seem to. I don't mind using
update, but I would like to understand the difference between the two. Here is my rule
file.
rule "Add person to math class"
no-loop
when
person : Person(likesMath == true)
then
person.setClassName("Math");
insert(person);
end
I also have a query:
query getPeopleForClass(String _className)
Person(className == _className)
end
When I add two facts to working memory, where the likesMath attribute is true, then run
my query I get zero results back. When I change the rule, "Add person to math
class", to use update(person) instead of insert(person) two students are returned.
Any help would be appreciated.
Thanks,
Dan
Daniel Quinn
Fedex - Custom Critical
Software Specialist I
234.310.4090(x2586)
-----Original Message-----
From: rules-users-bounces(a)lists.jboss.org [mailto:rules-users-bounces@lists.jboss.org
<mailto:rules-users-bounces@lists.jboss.org> ] On Behalf Of thomaskukofka(a)web.de
Sent: Wednesday, September 10, 2008 2:27 PM
To: rules-users(a)lists.jboss.org
Subject: [rules-users] Re: looping problem
Hello,
thanks that works. I just forgot to set the focus in the init rule..
Regards
Thomas
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