[jboss-jira] [JBoss JIRA] Commented: (JBRULES-850) Cannot bind variable to unconstrained field

Tue May 22 20:35:52 EDT 2007

    [ http://jira.jboss.com/jira/browse/JBRULES-850?page=comments#action_12362943 ] 

Michael Neale commented on JBRULES-850:
---------------------------------------

yes, I think this is reasonable. 

Couple of solutions, but we may slightly rework the final model before CR of BRMS. There is lots of new expressive stuff, perhaps we don't have to bind to variables so much any more.

But at the very least, if there is no constraint binding can be allowed (should only take a few minutes to correct).

> Cannot bind variable to unconstrained field
> -------------------------------------------
>
>                 Key: JBRULES-850
>                 URL: http://jira.jboss.com/jira/browse/JBRULES-850
>             Project: JBoss Rules
>          Issue Type: Feature Request
>      Security Level: Public(Everyone can see) 
>          Components: drools-brms
>            Reporter: Michael Anstis
>         Assigned To: Michael Neale
>
> Sometimes it is necessary to bind variables to fields in the LHS without  constraining them. The binding then being used elsewhere perhaps in the RHS within an expression. The BRMS does not allow for this - fields must be constrained. Perhaps simply adding an extra option in the operator drop-down ("is equal to", "is not equal to") for "any" is the quickest workaround?
> Requirement
> rule "rule"
> when
> ObjectA( $v : value )
> then
> System.out.println($v * 1.5 + 100);
> end
> Generated DRL
> rule "rule"
> when
> ObjectA( $v : value null null )
> then
> System.out.println($v * 1.5 + 100);
> end

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