[drools-user] failed to expand DSL field constraint

[weily li]

Hi All,

 

Here is the exam DSL created:

 [when]the person =$person : Person()
 [when]-whose current danger is less than {level}=dangerLevel <={level}

 

 

 

Following is the DRL:

rule "sample_opeartor"
 when
  the person
   -whose current danger is less than 3 
 then

  ....
end

 

Here the field constraint '-whose current danger is less than 3' can't be expanded.

 

Exception:

org.drools.rule.InvalidRulePackage: unknown:56:0  Unable to expand: - whose current danger is less than 3. Due to _expression_ was not expandable: - whose current danger is less than 3

 at org.drools.rule.Package.checkValidity(Unknown Source)
 at org.drools.common.AbstractRuleBase.addPackage(Unknown Source)

...

Here is the corresponding DRL which works fine:
>  $person : Person(dangerLevel <=3) && Person(age >= (new Integer(service.getThrehold())));

 

Please help give helpful instruction to make it works.

Env:

Jboss IDE 2.0.0  with

Drools Plug-in:3.0.4

Thanks in adv!

rgds

Weily