module ActiveRecord::AttributeMethods::Query

def attribute?(attribute_name)
  query_attribute(attribute_name)
end

def query_attribute(attr_name)
  value = self[attr_name]
  case value
  when true        then true
  when false, nil  then false
  else
    column = self.class.columns_hash[attr_name]
    if column.nil?
      if Numeric === value || value !~ /[^0-9]/
        !value.to_i.zero?
      else
        return false if ActiveRecord::ConnectionAdapters::Column::FALSE_VALUES.include?(value)
        !value.blank?
      end
    elsif column.number?
      !value.zero?
    else
      !value.blank?
    end
  end
end