Re: [rules-users] Drools 4.0, Support for multiple pattern in accumulate source pattern

Hi Mark, Can you tell me what is wrong then with a rule below (WHEN part provided): when $order: Order( $orderId: id, $userId: userId, $orderParts: orderPart /* this is a collection */ ) $user: User( id == $userId, $userOrderMoneyLimit: orderMoneyLimit ) Double( $orderTotal: doubleValue ) from accumulate ( OrderPart( $orderPartItemId: itemId, $orderPartItemAmount: amount ) from $orderParts Item( $itemPrice: price, id == $orderPartItemId ), // Line NNN init( double total=0; ), action( total += $itemPrice * $orderPartItemAmount; ), reverse( rval -= $itemPrice * $orderPartItemAmount; ), result( total ) ) I got an error: mismatched input 'Item' expecting ')' in rule "XXX"[NNN,53]: [ERR 102] Line NNN:53 mismatched input ',' expecting 'then' in rule "XXX" I tried to group both patterns with () but with the same result. Also, by changing rule to the one below (by removing second pattern and simulating $itemPrice): when $order: Order( $orderId: id, $userId: userId, $orderParts: orderPart /* this is a collection */ ) $user: User( id == $userId, $userOrderMoneyLimit: orderMoneyLimit ) Double( $orderTotal: doubleValue ) from accumulate ( OrderPart( $orderPartItemId: itemId, $orderPartItemAmount: amount ) from $orderParts, init( double total=0; double $itemPrice=3.33; ), action( total += $itemPrice * $orderPartItemAmount; ), reverse( rval -= $itemPrice * $orderPartItemAmount; ), result( total ) ) Everything works fine. So, it looks like that problem is related to Second pattern. Is there some special syntax for it?