[rules-users] Ask for help on rule authoring

[Benson Fung]

Hi Wolfgang,

I managed to author this rule(ApplicationData( age == null || age ==
"" )) via Technical Rules editor of BRMS.
However, I cannot create this rule via Business Rule Guided Editor of BRMS.

Could you let me know how?


Thanks



2011/3/26 Wolfgang Laun <wolfgang.laun at gmail.com>:
> You can't use a method call as the left hand side operand in a constraint;
> thus
>    age.size() == 0
> is not correct.
>
> Do you really mean
>    age == "null"
>
> Probably
>   ApplicationData( age == null || age == "" )
> is the right thing to do, provided that ApplicationData.age is a String.
>
> -W
>
> On 25 March 2011 17:32, Benson Fung <benson.redhat at gmail.com> wrote:
>>
>> Hi,
>>
>> I got the following rule problem.
>>
>> The rule is like :
>>
>> 1.      |       rule "Rule1"
>> 2.      |           dialect "mvel"
>> 3.      |           when
>> 4.      |               ad : ApplicationData( age == "null" , age.size()
>> == 0)
>> 5.      |           then
>> 6.      |               ad.setReturnMsg( "age should not be null or empty"
>> );
>> 7.      |       end
>>
>> where setReturnMsg is a method of ApplicationData Fact();
>>
>> However, I got the validation error :
>>
>> [Rule1] [ERR 101] Line 4:49 no viable alternative at input ')' in rule
>> "Rule1" in pattern ApplicationData
>> [Rule1] [ERR 102] Line 4:51 mismatched input '==' expecting ')' in
>> rule "Rule1" in pattern ApplicationData
>>
>> Please help what the problem is.
>>
>>
>> Thanks
>> _______________________________________________
>> rules-users mailing list
>> rules-users at lists.jboss.org
>> https://lists.jboss.org/mailman/listinfo/rules-users
>
>
> _______________________________________________
> rules-users mailing list
> rules-users at lists.jboss.org
> https://lists.jboss.org/mailman/listinfo/rules-users
>
>