[rules-users] Error using forAll() in rules

[Wolfgang Laun]

Your description of what you think you have to do does not agree with much
of the code you show.

- The rule name says that is depends on A.name == "bob", which isn't in the
condition.
- The RHS setA( $a.getName() ) is obviusly in error because B.a is an A, not
a String.
- Why should B be modified, if the change only concerns A.name.

It is sufficient to change A.name. All Bs referencing that one A will
continue to reference the modfied A.

-W


2010/6/10 Fnu Mahalakshmi <FMahalakshmi at nyx.com>

>  Hi,
>
> I have a list of items which I want to modify if condition turns true. I
> tried forall but its not working::
>
>
>
> A{
>
> String Name
>
> }
>
> B{
>
> A a,
>
> }
>
>
>
> Rule “ modify B if A name = ‘bob’”
>
> *when*
>
>             *forall*($a : A()
>
>                   $b : B( a == $a)
>
>                   )
>
>       *then*
>
>             modify($b){
>
>             seta($a.getName())};
>
> I have many B objects pointing to same A object and when name of A is
> modified I want the rule to fire and all B to also be modified.
>
>
>
> What is wrong above???
>
> I tried this too:
>
> *when*
>
>             *forall*($a : A()
>
>                   B( a == $a)
>
>                   )
>
>       *then*
>
>             modify($b){       // but then I cannot do this step.which is
> required
>
>             seta($a.getName())};
>
>
>
> Any Idea???
>
>
>
>
>
> Thank you
>
> M
>
>
>
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