Re: [rules-users] Using Collections in LHS

Thanks Jeffery. I'll try this but what if I have more complex condition e.g. Order ($discount : discount, $items : items) Item(grade > 3 && (quantity < 5 || $discount > 10)) from $items Date: Tue, 23 Feb 2010 15:14:18 -0800 From: ml-node+412055-2130217977-80541(a)n3.nabble.com To: sdhari(a)hotmail.com Subject: Re: Using Collections in LHS I think what you are looking for is the following. Someone please correct me if I am incorrect. when Order($discount : discount Item(grade > 3) from $items then System.err.print(“Discount is not allowed with items having grade 3 or higher”); This would fire when an Order has a discount greater than 10 and an item with a grade greater than 3. Not sure why you even need the $discount variable. You could just do Order(discount > 10, $items : items) for the first line of the when clause. From: [hidden email] [mailto:[hidden email]] On Behalf Of Shabbir Dhari Sent: Tuesday, February 23, 2010 5:27 PM To: [hidden email] Subject: Re: [rules-users] Using Collections in LHS Hi W I know about case sensitivity issue. How can I combine both Order and Item in one condition. I tried all possibilities but getting syntax error. For example: Order ($items : items, $discount : discount > 10, Item(grade > 3) from $items) // gives error Can please code this condition correctly for me? Dhari Date: Tue, 23 Feb 2010 13:43:01 +0100 From: [hidden email] To: [hidden email] Subject: Re: [rules-users] Using Collections in LHS Discount is a field of Order and must not appear in an Item(...). Probably you want: Order ( $discount : Discount > 10,... Also, most likely, all your fields need to be written with a lower case initial letter, Order ( $discount : discount > 10, $items : items) -W On Tue, Feb 23, 2010 at 1:11 PM, dhari <[hidden email]> wrote: In this scenario I do have typical Order and Items data structure. I want to implement various business rules where I want to check both Order attributes and Item attributes together. Order [ Date, Discount, Amount, Customer, Type, Items] Item [ Quantity, Rate, ExpiresDate, Grade ] I am trying to implements following rules but all gives me syntax error. I wondering if someone can help me in. rule one when Order ( $discount : Discount, $items : Items) Item ($discount > 10 && Grade > 3) from $items then System.err.print(Discount is not allowed with items having grade 3 or higher) end rule two when Order ( $discount : Discount, $items : Items) Item ($discount > 20 || Quantity < 5 ) from $items then //do some thinge end -- View this message in context: http://n3.nabble.com/Using-Collections-in-LHS-tp386923p386923.html Sent from the Drools - User mailing list archive at Nabble.com. _______________________________________________ rules-users mailing list [hidden email] https://lists.jboss.org/mailman/listinfo/rules-users Find out now Link all your email accounts and social updates with Hotmail. _______________________________________________ rules-users mailing list [hidden email] https://lists.jboss.org/mailman/listinfo/rules-users View message @ http://n3.nabble.com/Using-Collections-in-LHS-tp386923p412055.html To unsubscribe from Drools - Java Rules Engine, click here. _________________________________________________________________ Find a great deal on your next car. Get straight to the Point. http://clk.atdmt.com/NMN/go/157637060/direct/01/ -- View this message in context: http://n3.nabble.com/Using-Collections-in-LHS-tp386923p412081.html Sent from the Drools - User mailing list archive at Nabble.com.