what do you think of using the function route as a work around?
do you see any issues with using that ?

--- On Mon, 9/5/11, Michael Anstis <[email protected]> wrote:

From: Michael Anstis <[email protected]>
Subject: Re: [rules-users] is null or is not Null failing for a String field 
check in Guvnor drl
To: "Rules Users List" <[email protected]>
Date: Monday, September 5, 2011, 1:04 PM

Shame :(

5.2.0.Final could well be fixed... are you able to try that? CR! was 
effectively pre-release.

2011/9/5 puja nandamuri <[email protected]>

Michael,

Thanks. Yes, I am using 5.2.0.CR1.I do not have a choice to move to 5.3 at this 
point.
as an alternate, I am using the following work around.
to be able to do 'is null'  or 'is not null'  for checking null condition on a 
field,

I select 'equal to'  as the operator and then, I click on the function button  
instead  of literal value .
In the text box that comes up, I enter null  

Doing this validates the condition successfully and I am able to run the test 
scenario successfully .similarly, I select 'not equal to' operator for checking 
is not null condition and then in the function text box, I enter
 null.
 



--- On Mon, 9/5/11, Michael Anstis <[email protected]> wrote:


From: Michael Anstis <[email protected]>
Subject: Re: [rules-users] is null or is not Null failing for a String field 
check in Guvnor drl

To: "Rules Users List" <[email protected]>
Date: Monday, September 5, 2011, 12:13 PM


It was a bug but was fixed a while ago.

I can't recall if it made 5.2 - but it definately doesn't exist in 5.3.0.CR1 
(or master branch as of today - I just checked).

2011/9/5 puja nandamuri <[email protected]>


Hi ,

when using a business rule guided editor ,



for a fact, when I select a string type field from the drl guided editor in 
Guvnor  and select 
 is null from the dropdown list of operators,

I get the following validation error when I do a validate on the rule.



no viable alternative at input 'null' in rule "Asset_Description_NullCheckRule"

when I do a View Source, it shows the source as 

when
            Asset( description == null null ) 



Is this a bug ? 

if I select the free form drl option and create the when condition as

 Asset( description == null ) , it validates fine.

Thanks,

Ram

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