Working but hidden/missing entities - doctrine-orm

Question

I have several modules in my zf2 application, they all have their own entities and all on the same connection.
A little diagram to explain the situation :
-Module 1
-Entity A
-Entity B
-Module 2
-Entity C
-Entity B
(all on the same database connection)
The problem is all the entities are working, i can fetch, update them, etc. but some are "invisible". I have some cross-module relations and they are working fine too.
For exemple, all entities from module 2 does not appear when I use the php public/index.php orm:info command nor in the Zend Developer Toolbar.
When I edit an entity, I have to manually update the database as php public/index.php orm:schema-tool:update says Nothing to update - your database is already in sync with the current entity metadata.
The entities can be fetched, they are just not "seen" by the ZDT nor the terminal, I don't know what I did wrong.
Thanks for your help

Answer 1

This is often caused when the path to the entities has not been declared in your config:
<?php
return array(
'doctrine' => array(
'driver' => array(
// defines an annotation driver with two paths, and names it `my_annotation_driver`
'my_annotation_driver' => array(
'class' => 'Doctrine\ORM\Mapping\Driver\AnnotationDriver',
'cache' => 'array',
'paths' => array(
'path/to/my/entities',
'another/path'
),
),
// default metadata driver, aggregates all other drivers into a single one.
// Override `orm_default` only if you know what you're doing
'orm_default' => array(
'drivers' => array(
// register `my_annotation_driver` for any entity under namespace `My\Namespace`
'My\Namespace' => 'my_annotation_driver'
)
)
)
)
);