quote (ActiveRecord::ConnectionAdapters::Quoting)

    # File lib/active_record/connection_adapters/abstract/quoting.rb, line 6
          def quote(value, column = nil)
            # records are quoted as their primary key
            return value.quoted_id if value.respond_to?(:quoted_id)

            case value
              when String, ActiveSupport::Multibyte::Chars
                value = value.to_s
                if column && column.type == :binary && column.class.respond_to?(:string_to_binary)
                  "#{quoted_string_prefix}'#{quote_string(column.class.string_to_binary(value))}'" # ' (for ruby-mode)
                elsif column && [:integer, :float].include?(column.type)
                  value = column.type == :integer ? value.to_i : value.to_f
                  value.to_s
                else
                  "#{quoted_string_prefix}'#{quote_string(value)}'" # ' (for ruby-mode)
                end
              when NilClass                 then "NULL"
              when TrueClass                then (column && column.type == :integer ? '1' : quoted_true)
              when FalseClass               then (column && column.type == :integer ? '0' : quoted_false)
              when Float, Fixnum, Bignum    then value.to_s
              # BigDecimals need to be output in a non-normalized form and quoted.
              when BigDecimal               then value.to_s('F')
              else
                if value.acts_like?(:date) || value.acts_like?(:time)
                  "'#{quoted_date(value)}'"
                else
                  "#{quoted_string_prefix}'#{quote_string(value.to_yaml)}'"
                end
            end
          end