[rules-users] For loop inside a modify block problem

[Swindells, Thomas]

From: rules-users-bounces at lists.jboss.org [mailto:rules-users-bounces at lists.jboss.org] On Behalf Of Mark Proctor
Sent: 11 January 2012 15:27
To: rules-users at lists.jboss.org
Subject: Re: [rules-users] For loop inside a modify block problem

Why no braces after SomeBusinessLogic?

Also your logic is wrong there. Item is not a collection so your for loop is repeating the same action over and over again for the same data.
[Swindells, Thomas] It does look like that but it depends what the action is. Perhaps it is integrating with a rubbish stock system which can only remove one item at a time, to remove n identical items you have to call it n times.


Mark

On 11/01/2012 09:27, Martin A wrote:
Hi, Davide,

Here is how my rule looks like :

when
    $item : Item(param1 != 0, param2 == 0, !(this instanceof SpecialItem))
    $gsc : SomeBusinessLogic
then
    $gsc.doSomething($item.id<http://item.id/>);
    for (int i = 0; i < $item.quantity; i++) {
        $gsc.doSomethingElse($item.id<http://item.id/>);
    }
    update($gsc);
end

The above snippet throws an error @ i < $item.quantity, and says 'no such identifier $item'...
I can't figure out what might be causing this.

Thanks

On Tue, Jan 10, 2012 at 10:08 PM, Davide Sottara <dsotty at gmail.com<mailto:dsotty at gmail.com>> wrote:
Did you remember to bind $item to some expression in the LHS ? Maybe you just
called that "item" without the $ :)
Davide

(the original "modify" syntax is still wrong anyway)

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