method
    
    rollback_db_transaction
 
  rollback_db_transaction()
  public
  Rolls back the transaction (and turns on auto-committing). Must be done if the transaction block raises an exception or returns false.
 
  rollback_db_transaction()
  public
  Rolls back the transaction (and turns on auto-committing). Must be done if the transaction block raises an exception or returns false.