Re: [rules-users] Loop Drools on Multi Element

Using forall isn't so complicated. You can use the simplified form, where the condition to be satisfied is written in the pattern selecting the domain. rule setPriority when $order: OrderType( priority != "high" ) forall ( OrderLineType( quantity > 2 ) from $order.lineItem ) then modify( $order ){ setPriority( "high" ) } System.out.println( "set to high" ); end This illustrates very nicely the duality (by de Morgan's laws) between forall and negated existence. As for efficiency: repeated evaluation of large lists where the elements aren't facts /may/ slow you down - whether this is a problem depends on other factors. -- View this message in context: http://drools.46999.n3.nabble.com/Loop-Drools-on-Multi-Element-tp3761638p... Sent from the Drools: User forum mailing list archive at Nabble.com.