Checking that a record already Exists
Hello,
I would like to create a validation to check if a record has already been created. I'm not sure how to go about it.
The record has a name, date_from and date_to. If I were to create another record for an existing user and one of the dates fell within a range of dates already existing for that user I would like to be able to notified.
Does anyone know how to handle this validation?
Kind Regards,
Steve Welch