# File activerecord/lib/active_record/attribute_methods/query.rb, line 10
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 ActiveModel::Type::Boolean::FALSE_VALUES.include?(value)
        !value.blank?
      end
    elsif value.respond_to?(:zero?)
      !value.zero?
    else
      !value.blank?
    end
  end
end