Rails 4 custom validate_uniqueness message

Question

Is it possible that in the error message of validate_uniqueness_of to show the id of the record that already has the field that i'm checking the uniqueness?

Answer 1

Try something like this

validate :uniqueness_of_name

def uniqueness_of_name
   existing_record = Model.find_by_name(name)
   unless existing_record.nil?
     errors.add(:name, "Record #{existing_record.id} already has the name #{name}")
   end
end