method
name_exists?
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Class: Person
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name_exists?(name, id = nil)
public
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# File activerecord/examples/validation.rb, line 25 def self.name_exists?(name, id = nil) if id.nil? condition = [ "name = '%s'", name ] else # Check if anyone else than the person identified by person_id has that user_name condition = [ "name = '%s' AND id <> %d", name, id ] end !find_first(condition).nil? end