Re: [rules-users] Validation flow - defer expression evaluation

putting "$var: user.?manager.name" to avoid nullpointer in the business rule defeats the purpose of a sanity check upfront, as execution should fail if the relation is empty. Nullpointers are not an elegant way to fail, and the stack trace gives no clue in which rule the error occurred. I was thinking of starting a seperate session to run validation. This is cumbersome however, en I would like to find a way to solve this problem with a process(rule) flow. I guess it's about rule activation occuring. Is there a way to activate the business rules only when validation rules have passed? I will try starting a subprocess, and see if this activates the business rules at the appropriate time in the flow. Any suggestions to avoid this trial and error approach are most welcome. -- View this message in context: http://drools.46999.n3.nabble.com/Validation-flow-defer-expression-evalua... Sent from the Drools: User forum mailing list archive at Nabble.com.