[rules-users] Field value is different when and then section, very strange. Is it mvel vs java issue

[Esteban Aliverti]

Your expected behavior is not correct since you are not updating/modifying
the fact after you change one of its properties. By default Drools doesn't
know when a fact is modified so you have to explicitly let him know by
using the modify() automagic function.

Best Regards

XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX

Esteban Aliverti
- Blog @ http://ilesteban.wordpress.com


On Mon, Oct 29, 2012 at 11:59 PM, kina06 <reachkn6 at gmail.com> wrote:

> I have inserted 3 accounts into knowledge session with the following
> account
> statuses 1-NEW, 2-TRANSFER,3-CLOSE.
>
> EXPECTED BEHAVIOR:
> As per below given rules, first rule should change all of them to 'pending'
> status, so second rule should never fire and third rule always fire for
> above 3 accounts.
>
> ACTUAL BEHAVIOR:
> second rule is fired for account with new status, i.e. the first one, but
> in
> the system out its status is shown as PENDING before i set it to ERROR.
>
> Can't figure out what's wrong with this, does it has to do anything with
> MVEL vs JAVA usage? I mean in when claues it's mvel and in then clause it's
> java, so is that causing problem?
>
>
> rule "Rule1"
> salience -1
> when
>         account : Account();
> then
>     System.out.println("Ac state rule1 before change "+
> account.getAccountStatus());
>       account.setAccountStatus( "PENDING" );
>       System.out.println("Ac state rule1 after change "+
> account.getAccountStatus());
> end
>
>
> rule "Rule2"
> salience -2
>      when
>          account : Account(StringUtils.equals(accountStatus,"NEW"))
>          then
>             System.out.println("Ac state RuleNo2 before change "+
> account.getAccountStatus());
>          account.setAccountStatus("ERROR");
>          System.out.println("Ac state RuleNo2 after change "+
> account.getAccountStatus());
> end
>
> rule "Rule3"
> salience -3
>      when
>          account : Account(StringUtils.equals(accountStatus,"PENDING"))
>          then
>             System.out.println("Ac state  "+ account.getAccountStatus()+ ".
> YES
> this is expected");
> end
>
>
>
> --
> View this message in context:
> http://drools.46999.n3.nabble.com/Field-value-is-different-when-and-then-section-very-strange-Is-it-mvel-vs-java-issue-tp4020550.html
> Sent from the Drools: User forum mailing list archive at Nabble.com.
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