Hi Sudhir, What you need is an accumulate. I recommend you to read documentation about it. I've attached a test case of your scenario. Best, ---------- Forwarded message ---------- From: Sudhir M <sudhir.cse(a)gmail.com&gt; Date: Wed, Jan 6, 2010 at 5:04 AM Subject: [rules-users] doubt in using collections and nested objects To: rules-users(a)lists.jboss.org Hi All, I have a scenario which is similar to the one detailed below There is a class Student and each students has a list of subjects. Each subject has a name and a flag which is an indicator of pass or failure. Now how can I write a rule which tells me if there are atleast 10 students who failed in a subject maths. Thanks sudhir. _______________________________________________ rules-users mailing list rules-users(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users -- XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX Esteban Aliverti

On 1/7/10, Sudhir M <sudhir.cse(a)gmail.com&gt; wrote: Hi Esteban, I am able to add Subject to the collectList but not the Student. Is that we can only accumulate nested objects not the fact itself? Thanks, sudhir.

Great! I didn't have time yesterday to check out your issue. I'm glad you solved it. Best, On Fri, Jan 8, 2010 at 3:51 AM, Sudhir M <sudhir.cse(a)gmail.com&gt; wrote: -- XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX Esteban Aliverti