[rules-users] Error using forAll() in

Thu Jun 10 17:21:34 EDT 2010

Hi,

Thanks for the prompt response.
I just broke the information into 2 separate rules and it works great.
In 1 I modified it to check if the value of B is modified then that A value is modified
In the 2 rule I checked if A is modified then all the Bs referencing A is modified.
Removed the forAll completely.
Thanks for the help :)

-M
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Today's Topics:

   1. Error using forAll() in rules (Fnu Mahalakshmi)
   2. Re: Error using forAll() in rules (Wolfgang Laun)

----------------------------------------------------------------------

Message: 1
Date: Thu, 10 Jun 2010 16:16:47 -0400
From: Fnu Mahalakshmi <FMahalakshmi at nyx.com>
Subject: [rules-users] Error using forAll() in rules
To: "'rules-users at lists.jboss.org'" <rules-users at lists.jboss.org>
Message-ID:
	<994758E35590274E955FA75763C5AA5002D010C6 at MTEXMBXP01.ad.NYX.com>
Content-Type: text/plain; charset="us-ascii"

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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Message: 2
Date: Thu, 10 Jun 2010 22:47:31 +0200
From: Wolfgang Laun <wolfgang.laun at gmail.com>
Subject: Re: [rules-users] Error using forAll() in rules
To: Rules Users List <rules-users at lists.jboss.org>
Message-ID:
	<AANLkTimXe7FoIGmku_PMF5cKg86Qb3yxXfuSFIHa2Mfs at mail.gmail.com>
Content-Type: text/plain; charset="windows-1252"

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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> Note: The information contained in this message and any attachment to it is
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