quote_default_expression

# File activerecord/lib/active_record/connection_adapters/abstract/quoting.rb, line 114
      def quote_default_expression(value, column) # :nodoc:
        if value.is_a?(Proc)
          value.call
        else
          value = lookup_cast_type(column.sql_type).serialize(value)
          quote(value)
        end
      end