I suspect the rules you create will be really ugly and not support your longer term goals of flexibility. It might be better to transform your data into a better fact model that gives you the ability to create real business rules that are understandable.
It appears that it is better to create a fact model that is more shallow and uses almost relational concepts to relate the facts together rather than a deeply nested model (I suspect you are getting this from some really ugly xml structure). So whilst it's a pain, I would reconsider your core domain/fact model.
On Fri, Dec 4, 2009 at 4:08 PM, Pritam
<infinity2heaven@gmail.com> wrote:
I have the same problem as I'm trying to create a decision table via excel
where the fact is a root object A where A has a collection B, and B has a
collection C. My rules are based out of the instance A, loop for each object
in B, and within that, loop each object in C. Not sure how I can write an
expression for the same.
>From the examples, I see that one can access a particular element in A by
$a.listname[1] but in my case, I need to access all elements in the loop.
Any suggestions?
prasad raju sagi wrote:
>
> Hi ,
>
> I am trying to create rule on a fact , which contains arraylist of
> collection and the object in the collection internally contains an
> arraylist of another collection of objects.
>
> This looks like object A contains collection of objects B and B contains
> collection object C
>
> A -> blist ( Arraylist )
>
> B -> clist (ArrayList<C> )
>
> C-> dlist( ArrayList<D>)
>
> D-> type ( string)
>
> I am inseting A as fact to the working memory.
>
> I am in confusion state like how to write the rule to place conditions on
> collection C.
>
> Can I use from in the form of nested from in rule statment.
> Thanks
> Prasad Raju Sagi
> Mobile: 847-644-4103
>
>
>
>
> ________________________________
> From: Aziz Boxwala <boxwala@yahoo.com>
> To: rules-users@lists.jboss.org
> Sent: Thursday, June 11, 2009 1:58:28 PM
> Subject: [rules-users] process order example not working fully
>
>
> I am trying to execute a ruleflow and use rules to assign tasks within the
> ruleflow in Drools 5.0.1. I have a drl file included in my knowledge base
> that tries to assign a task to a user when a new human task is created.
> This is based on the example in org.drools.example.process.order. I can't
> get my code to work. I don't the rules in the example are working either
> (dslr for the task assignment or the drl for dynamic logging). After some
> attempts, I found that this condition
> WorkItemNodeInstance()
> does not evaluate to true ever.
>
> Do I have to do anything special to make the WorkItemNodeInstance appear
> in working memory?
>
> Thanks for any help.
>
> --Aziz
>
>
>
> _______________________________________________
> rules-users mailing list
> rules-users@lists.jboss.org
> https://lists.jboss.org/mailman/listinfo/rules-users
>
>
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