I don't believe it is possible to negate rules in Guvnor using the guided editor. Please raise a JIRA for an enhancement.

AFAIK the only work around would be to specify "Free form DRL" when constructing the pattern.

With kind regards,

Mike

On 29 April 2011 21:46, Dean Whisnant <dean@basys.com> wrote:

Hi,

I have a rule where I want to check if an object doesn't exist or it exists and a field in it is null or a field in it is D.

Here's .drl code that works

rule "test does not exist is null or is D"
       when
               (not CLM_DET_LOAD_PendCode() ||
                        CLM_DET_LOAD_PendCode(pendCode_29== (null)) ||
                       CLM_DET_LOAD_PendCode(pendCode_29== "D")
               )
       then
               System.out.println("CLM_DET_LOAD_PENDCOE does not exist, is null, or is D");
End

Normally in Guvnor to do an Or, I choose "Any of the following are true..." from the 'Add a condition to the rule...' dialogue.  But when I choose this and then try to do the "not" logic, there is no choice for 'not'.  I can get the other two conditions in just fine.  Short of putting freeform DRL language in there, do you have any suggestions?  Am I missing an option in guvnor?

Thanks

Dean

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