with_transaction_isolation_level

# File activerecord/lib/active_record.rb, line 616
  def self.with_transaction_isolation_level(isolation_level, &block)
    original_level = self.default_transaction_isolation_level
    self.default_transaction_isolation_level = isolation_level
    yield
  ensure
    self.default_transaction_isolation_level = original_level
  end