Monkey patching Rails 3.2 to write datetimes with precision

time.rb

# config/initializers/time.rb
module ActiveRecord
  module ConnectionAdapters
    module Quoting
      alias_method :old_quoted_date, :quoted_date
      alias_method :old_quote, :quote

      # In Rails 3.2 quoted_date does not have the column argument
      def quoted_date(value, column = nil)
        # Calls original method ; default in Rails 3.2
        return old_quoted_date(value) unless column

        result = old_quoted_date(value)
        # Just in case someone changes the :db format to include subsecond precision
        return result if result.index('.')

        # Will return value with micro seconds, letting mysql round the value
        # according to the column length
        "#{result}.#{value.usec}"
      end

      def quote(value, column = nil)
        if value.is_a?(ActiveSupport::TimeWithZone) && column.try(:limit) && column.limit > 0
          return "'#{quoted_date(value, column)}'"
        end

        old_quote(value, column)
      end
    end
  end
end