define_enum_methods

# File activerecord/lib/active_record/enum.rb, line 302
          def define_enum_methods(name, value_method_name, value, scopes, instance_methods)
            if instance_methods
              # def active?() status_for_database == 0 end
              klass.send(:detect_enum_conflict!, name, "#{value_method_name}?")
              define_method("#{value_method_name}?") { public_send(:"#{name}_for_database") == value }

              # def active!() update!(status: 0) end
              klass.send(:detect_enum_conflict!, name, "#{value_method_name}!")
              define_method("#{value_method_name}!") { update!(name => value) }
            end

            if scopes
              # scope :active, -> { where(status: 0) }
              klass.send(:detect_enum_conflict!, name, value_method_name, true)
              klass.scope value_method_name, -> { where(name => value) }

              # scope :not_active, -> { where.not(status: 0) }
              klass.send(:detect_enum_conflict!, name, "not_#{value_method_name}", true)
              klass.scope "not_#{value_method_name}", -> { where.not(name => value) }
            end
          end