quote_bound_value

# File activerecord/lib/active_record/base.rb, line 1367
        def quote_bound_value(value, c = connection) #:nodoc:
          if value.respond_to?(:map) && !value.acts_like?(:string)
            if value.respond_to?(:empty?) && value.empty?
              c.quote(nil)
            else
              value.map { |v| c.quote(v) }.join(',')
            end
          else
            c.quote(value)
          end
        end