I can't seem to find this on their site or here. I'm hoping the answer is YES. Specifically I want to write a Verifier to check for unique key violations (I know I will have to raise the isolation level to Serializable). This won't work unless the Verifier runs in the same transaction as the Save.
Does DevForce use the same transaction for validation and the save
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DevForce does not use the same transaction for validation and save processing. Within the context of an EntityServerSaveInterceptor, authorization and validation are performed and then a TransactionScope is opened when doing the actual save. If you do a query within a verifier it will use a separate TransactionScope.
You can work around this behavior with a little extra work in your custom EntityServerSaveInterceptor. Override the ValidateSave function to bypass validation, then override the ExecuteSave method to open a TransactionScope and then do your validation logic before calling the base save logic. The TransactionScope opened by DF during the save will enlist in your TransactionScope. Something like this: