Define a custom method in Doctrine\ORM\PersistentC

Question

I'm fetching data with a many-to-many relationship and I want to define acustom method. Is it possible (and how) to use something like:

$hotel = $entityManager->getRepository('Hotels')->findOneById(1);
$types = $hotel->getTypes(); //$types is instance of **Doctrine\ORM\PersistentCollection**
$types->myCustomFunction(); //do something

Answer 1

It seems to be not implemented already.

See this Doctrine's JIRA issue : http://www.doctrine-project.org/jira/browse/DDC-547

Consider allowing custom PersistentCollection implementations

We should consider allowing the configuration of custom PersistentCollection implementations on a per-association basis. This could allow users to craft optimized (SQL) behavior for for some of their collections to improve performance without changing the domain model code.

For this, PersistentCollection needs to be designed for inheritance.