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

[AleBu]

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?


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