   Hmm, now that you mentioned, I see that our parser is limiting the forall() CE, not allowing nested "from" CEs. This is something we should fix, since the limitation is purely a parser limitation.

   Anyway, for your case, the workaround is simply to use the "raw" forall-equivalence: not( A() and not( B() ) ). So try this:

rule "Do Not Process TAX" when
$report: ExpenseReport($expenseDetails: expenseDetails)
   not ( $ed : ExpenseDetails() from $expenseDetails and
                     not ( ExpenseDetails( this == $ed, expenseType == ExpenseType.TAX ) from $expenseDetails )
               )

then
System.out.println("################ It works ##################");
insertLogical("Bypass Process");
end

This is just more verbose than the forall, but it is exactly the same. Once the parser is fixed, you will be able to simply write:

rule "Do Not Process TAX" when
$report: ExpenseReport($expenseDetails: expenseDetails)
forall ( ExpenseDetails( expenseType == ExpenseType.TAX ) from $expenseDetails )

then
System.out.println("################ It works ##################");
insertLogical("Bypass Process");
end

    BTW, may I ask you please to open a JIRA so we don't forget to fix this for 5.0?

    Thanks,
         Edson

2008/5/18 Alessandro Di Bella <aldibella@gmail.com>:

Hi,

I have these two classes:

ExpenseReport{
Collection<ExpenseDetails> expenseDetails
}
ExpenseDetails{ ExpenseReport document
ExpenseType expenseType
}

I am trying to create a rule that fires when all the ExpenseDetails in a
ExpenseReport are of the same type:

rule "Do Not Process TAX" when
$report: ExpenseReport($expenseDetails: expenseDetails)
forall (
ExpenseDetails(document==$report, expenseType == ExpenseType.TAX)
) then
System.out.println("################ It works ##################");
insertLogical("Bypass Process");
end

For some reasons, it fires regardless that value of
ExpenseDetails.expenseType.

I just started with drools and any help i more than welcome.

Thanks

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Edson Tirelli
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