<br> Remember that "collect" is a simplified form of "accumulate". So when you can't achieve what you want with collect, first thing you should look for is accumulate.<br><br>$list : List() from accumulate( <br>
$foo : Foo( ) and not Bar( id == $<a href="http://foo.id">foo.id</a> ),<br> collectList( $foo ) )<br><br> Please note that I changed your example making the constraint in Bar use "==" instead of "!=" because I think that is what you want. But if it is not, just use whatever expression you want.<br>
<br> Also be aware that collect/accumulate are heavy CEs. Nesting multiple patterns inside accumulate is even heavier, so use it wisely.<br><br> Hope it helps,<br> Edson<br> <br><br><div class="gmail_quote">2009/8/18 techy <span dir="ltr"><<a href="mailto:techluver007@gmail.com">techluver007@gmail.com</a>></span><br>
<blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"><br>
Please someone help me on this.<br>
<div class="im"><br>
techy wrote:<br>
><br>
> I would like to collect All Foo() for which there is no Bar() as given<br>
> below.Please help me on this.<br>
> Thanks.<br>
><br>
> //psedo rule<br>
> rule 'test'<br>
> list : from collect( Foo(fooId: id) and not Bar(id !=fooId))<br>
> then<br>
> //do conseq<br>
> end<br>
><br>
<br>
--<br>
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<div><div></div><div class="h5">Sent from the drools - user mailing list archive at Nabble.com.<br>
<br>
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</div></div></blockquote></div><br><br clear="all"><br>-- <br> Edson Tirelli<br> JBoss Drools Core Development<br> JBoss by Red Hat @ <a href="http://www.jboss.com">www.jboss.com</a><br>