Symfony2 Relation between entities cross Bundles and multiple entity manager - symfony

Question

I'm using Symfony 2.7. I followed documentation on Symfony2 about How to Work with multiple Entity Managers and Connections. I tried every solutions on this site but without success. I have always the same error :
[Doctrine\Common\Persistence\Mapping\MappingException] The class
'Spot\OfferBundle\Entity\Offer' was not found in the chain configured
namespaces Dashboard\ProjectBundle\Entity
In my project, I have 2 bundles. Every bundle works with a different entity manager. Here my config file :
# Doctrine Configuration
doctrine:
dbal:
default_connection: default
connections:
default:
driver: %database2_driver%
host: %database2_host%
port: %database2_port%
dbname: %database2_name%
user: %database2_user%
password: %database2_password%
charset: UTF8
spot:
driver: %database3_driver%
host: %database3_host%
port: %database3_port%
dbname: %database3_name%
user: %database3_user%
password: %database3_password%
charset: UTF8
orm:
auto_generate_proxy_classes: %kernel.debug%
default_entity_manager: default
entity_managers:
default:
connection: default
mappings:
DashboardProjectBundle: ~
spot:
connection: spot
mappings:
SpotOfferBundle: ~
I have two entities with relations across bundles
The first :
namespace Dashboard\ProjectBundle\Entity;
use Doctrine\ORM\Mapping as ORM;
/**
* Project
*
* #ORM\Table(name="project")
* #ORM\Entity
*/
class Project
{
/**
* #var Spot\OfferBundle\Entity\Offer
*
* #ORM\ManyToOne(targetEntity="Spot\OfferBundle\Entity\Offer", inversedBy="projects")
* #ORM\JoinColumns({
* #ORM\JoinColumn(name="offer_id", referencedColumnName="id")
* })
*/
private $offer;
And the second :
namespace Spot\OfferBundle\Entity;
use Doctrine\ORM\Mapping as ORM;
/**
* Offer
*
* #ORM\Table(name="offer")
* #ORM\Entity(repositoryClass="Spot\OfferBundle\Entity\OfferRepository")
*/
class Offer {
/**
*
* #ORM\OneToMany(targetEntity="Dashboard\ProjectBundle\Entity\Project", mappedBy="offer")
*/
private $projects;
I try with use statement, I check AppKernel and Bundles are defined. I try with leading backslashes. But nothig works.

Answer 1

Make sure that you have set this in the config file:
assetic:
...
bundles: [ DashboardProjectBundle, SportOfferBundle]
UPDATE:
Also, try to set orm config like this:
orm:
auto_generate_proxy_classes: %kernel.debug%
default_entity_manager: default
entity_managers:
default:
connection: default
mappings:
DashboardProjectBundle: ~
SpotOfferBundle: ~
spot:
connection: spot
mappings:
SpotOfferBundle: ~