In my migration file I already have a 'MobileDeviceRecord' table with an 'ActivationCode' which is created in code from a GUID class when a new record is created. I want to ensure the new 'ActivationCode' is unique to the existing 'ActivationCodes' in
the table. Do I need to remove the 'ActivationCode' column and re-add it with a constraint or can I use an add_index...Also what is the proper way to use it??
public int UpdateFrom82()
add_index :MobileDeviceRecord, [:ActivationCode], :unique => true