5989c0cb54
I'm working through the tutorial myself and got to this point. Don’t forget to add a require_once call for this class to the bootstrap.php This advice is wrong. The class is located in the src directory and so is autoloaded when required. No require statement is necessary.
Doctrine 2 ORM
Master: 
2.4: 
2.3: 
2.2: 
2.1: 
Master: 
Doctrine 2 is an object-relational mapper (ORM) for PHP 5.3.2+ that provides transparent persistence for PHP objects. It sits on top of a powerful database abstraction layer (DBAL). One of its key features is the option to write database queries in a proprietary object oriented SQL dialect called Doctrine Query Language (DQL), inspired by Hibernates HQL. This provides developers with a powerful alternative to SQL that maintains flexibility without requiring unnecessary code duplication.