foundry: Entity cascading unexpected behavior

In the case we have 3 entities linked together likes:

class A
{
  /**
   * @ORM\OneToMany(targetEntity=B::class, mappedBy="a", cascade={"persist"})
   */
  private Collection $bs;

  private ?string $reference = null;

  public function __construct() {
    ​$this->bs = new ArrayCollection();
  ​}
}

class B
{
  /**
    * @ORM\ManyToOne(targetEntity=A::class, inversedBy="bs")
    * @ORM\JoinColumn(nullable=false)
    */
  ​private ?A $a = null;

  /**
   * @ORM\ManyToOne(targetEntity=C::class, inversedBy="bs", cascade={"persist"})
   * @ORM\JoinColumn(nullable=false)
   */
  ​private ?C $c = null;

  ​private ?string $reference = null;
}

class C
{
  /**
   * @ORM\OneToMany(targetEntity=B::class, mappedBy="c")
   */
  private Collection $bs;

  ​private ?string $reference = null;

  public function __construct() {
    ​$this->bs = new ArrayCollection();
  ​}
}

There is listener on A and C to generate tha A, B and C references. The A listener loop over the collection of B. It works well in the application, but when I want to create a fixture for A… It totally explode, when Foundry call the persist, there is no B inside the collection (in A class). But to generate the A reference I need the first B class of the collection and the linked C class.

Someone know how we can do this ? Actually I’ve something similar to:

AFactory::createOne();

Internally:

• AFactory call BFactory::new()->many(3);
• BFactory call CFactory::new();