gistfile1.txt

require 'active_record'
require 'active_record/base'

module ActiveRecord
  module ConnectionAdapters
    class Mysql2Adapter < AbstractAdapter
      def pk_and_sequence_for(table) #:nodoc:
puts "!!!"
        keys = []
        result = execute("SHOW CREATE TABLE #{quote_table_name(table)}", 'SCHEMA')
        ct = ''
        result.each(:symbolize_keys => true, :as => :hash) { |row| ct << row[:"Create Table"] }
        if ct.to_s =~ /PRIMARY KEY\s+\((.+)\)/
          keys = $1.split(",").map { |key| key.gsub(/`/, "") }
          keys.length == 1 ? [keys.first, nil] : nil
        else
          nil
        end
      end
    end
  end
end