[rules-users] How can I select planning-entities in the accumulate source-pattern based on a list of planning-variables?

[Marco Malziotti]

Try to move 'from' in 'from accumulate'. Pay attention to "and" in 
'from accumulate'.

         $match : PeopleMatch()

         $match: Number( intValue < 0 )
                    from accumulate(
                                     $people :  List() from 
$match.people and
                                     $task : Task(handler == $people) ,
                                     init( Matcher matcher = 
$match.getMatcher()),
                                     action( matcher.addTask( $task ); 
),
                                     reverse( matcher.removeTask( $task 
); ),
                                     result( matcher.getMatch() ) );


On Tue, 19 Feb 2013 07:59:21 -0800 (PST), Michiel Vermandel wrote:
> Hi,
>
> I am kind of stuck in writing a rule :
>
> I have PeopleMatch facts in working memory.
> Each PeopleMatch has a number of persons: PeopleMatch().getPeople =
> List
>
> I have planning-entities (Tasks) which have a planning-variable
> Person.
>
> Now I would like to create a rule to loop over the PeopleMatch
> objects, gather all Tasks for the people of this match and do some
> calculation with all tasks.
>
> This is what I have for the moment:
>
> rule "matchPeopleTasks"
>  when
>
>  $match : PeopleMatch()
>  $people : List() from $match .people
>
>  $match: Number( intValue < 0 )
>  from accumulate( $task : Task(handler == $people),
>  init( Matcher matcher = $match.getMatcher()),
>  action( matcher.addTask( $task ); ),
>  reverse( matcher.removeTask( $task ); ),
>  result( matcher.getMatch() ) );
>  then
>  ...
> end
>
> The problem area is of course the "accumulate( $task :
> ProjectTask(handler == $people),"
> How do I select all tasks in the accumulate function, based on a list
> of people?
>
> Thanks,
>
> Michiel
>
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