There isn't a nice way to do this unfortunately.
One hack around it is to have two columns with the object merged across them
The first column would have the condition $a : Company(this != $param), every cell in the column is then given the value 'null'.
This would then always ensure that $a will always exist. The second column can then be written as normal with your optional condition.
Thomas
**************************************************************************************
> -----Original Message-----
> From: rules-users-bounces@lists.jboss.org [mailto:rules-users-
> bounces@lists.jboss.org] On Behalf Of swaroop
> Sent: 20 January 2012 08:34
> To: rules-users@lists.jboss.org
> Subject: [rules-users] Can we set a default value for emlpty cells in Drools
> templates
>
> Hi,
>
> I am trying to write a template and came across a scenario where one of the
> condition cell $a : Company(condition), When
> condition is left blank then entire predicate is missed and iam using the ref of
> the company obj $a to set some values which is failing as the declaration part
> is missing, So i was thinking, if we can have a default value to the cell as $a :
> Company(), then the scenario will be handled.Kindly let me know how to
> implement the default value for a cell in template to overcome the above
> mentioned scenario
>
>
> Thanks
> Swaroop
>
> --
> View this message in context: http://drools.46999.n3.nabble.com/Can-we-
> set-a-default-value-for-emlpty-cells-in-Drools-templates-
> tp3674849p3674849.html
> Sent from the Drools: User forum mailing list archive at Nabble.com.
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