Based upon the single rule you show it is difficult to determine whether the issue you report is caused elsewhere.
Some general comments however:-
It is essential to include an "update($patient);" in your RHS if the rule engine is to see the change in Patient properties in other rules.
How many instances of Patient to you have in WM? Rules will activate for each instance that match patterns.
---------- Forwarded message ---------- From: Nico ROEDERER<ino.nicolas@gmail.com> Date: 1 March 2011 09:15
Subject: Re: [rules-dev] eval problem To: Rules Dev List <rules-dev@lists.jboss.org>
(1) -> yes because when I print the value, the
value is correct ( = 2 ). Not the eval.
(2) -> yes, true. My list is in alphabtic mode...
(3) -> Every test I make made the wrong result
eval( $patient.getNbFactRisque() == 0)
or $patient : PatientDto( nbFactRisque ==
0 ) ...
---> Why does those test are true dispite nbFactRisque = 2
????
It works fine when I run x time drools (one call
for one rule) but it doesn't work when I run one time with a
List of rules.
Can you tell me the right mailing list for those problems ?
Le 01/03/2011 10:03, Wolfgang Laun a écrit :
Please do not use this list for simple questions - it
is reserved for discussion Drools development itself.
(1) Did you inform the Drools engine about incrementing nbFactRisque?
(2) There is no such thing as "alphabetic mode" for rule
execution.
(3) Why do you use eval when you can test the fact field?
Indication: Drools Expert manual, three times per day ;-)
-W
I've got an other problem with an eval function.
I will try to discribe the path to the error.
I've got a repository where some people can put rules with
.drl extension.
My program is listing this repository and execute every
rule in this repository.
At the begining, I've got a 'PatientDto' who have a
property :
int nbFactRisque;
(with getters and setters)
Some rules increments this number.
In the last rule (the rules are executed in alphabetic
mode) I'm testing this number like this :
rule "RisqueNormal"
when
$patient : PatientDto()
eval( $patient.getNbFactRisque() == 0)
then
$patient.addDonnees( Constants.CLE_RISQUEPATIENT,
Constants.RISQUE_NORMAL );
System.out.println("RisqueNormal vérifié." +
$patient.getNbFactRisque() + "Facteurs.");
end
Here's my problem :
The 'Then' traitement is always executed so the eval
always think that $patient.getNbFactRisque()
is equal to 0.
But the system.out.println() show me that $patient.getNbFactRisque() = 2 !
Here's the output : "RisqueNormal
vérifié.2Facteurs.".
Perhaps I did something wrong ? Can someone help me ?
Thank you.