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Hi,I created a record in the entity Y the field x = 1.when I want to create a new record in the same entity Y, a field x = 1 , I want an error message saying that the field exists . how to do the creation of a unique field .thanks,
this is usually done via BeforeSaving processes.Give the number of questions you have i would suggest you to look at one of the MDM trainings.
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