count_fix.rb

class ActiveRecord::Base
protected
  def self.construct_count_options_from_args(*args)
    name_and_options = super
    if name_and_options[0].is_a?(String)
      if name_and_options[0].include?(',')
        name_and_options[0] = "DISTINCT #{quoted_table_name}.#{primary_key}"
      elsif name_and_options[0] =~ /\.\*$/
        name_and_options[0] = '*'
      end
    end
    name_and_options
  end
end