OneToMany fail on persist no parent id provided

[David-Baron]

I have this error:

SQLSTATE[23000]: Integrity constraint violation: 19 NOT NULL constraint failed: SaleQuoteLine.saleQuote_id

The parent entity:

/**
 * @ORM\Entity(repositoryClass=SaleQuoteRepository::class)
 */
class SaleQuote
{
    /**
     * @ORM\Id
     * @ORM\GeneratedValue
     * @ORM\Column(type="integer")
     */
    private $id;
   /**
     * @ORM\OneToMany(targetEntity=SaleQuoteLine::class, mappedBy="saleQuote", orphanRemoval=true,     cascade={"persist"})
     */
    private $saleQuoteLines;

    public function __construct()
    {
        $this->saleQuoteLines = new ArrayCollection();
    }
 /**
     * @return Collection|SaleQuoteLine[]
     */
    public function getSaleQuoteLines(): Collection
    {
        return $this->saleQuoteLines;
    }

    public function addSaleQuoteLine(SaleQuoteLine $saleQuoteLine): self
    {
        if (!$this->saleQuoteLines->contains($saleQuoteLine)) {
            $this->saleQuoteLines[] = $saleQuoteLine;
            $saleQuoteLine->setSaleQuote($this);
        }

        return $this;
    }

    public function removeSaleQuoteLine(SaleQuoteLine $saleQuoteLine): self
    {
        if ($this->saleQuoteLines->removeElement($saleQuoteLine)) {
            // set the owning side to null (unless already changed)
            if ($saleQuoteLine->getSaleQuote() === $this) {
                $saleQuoteLine->setSaleQuote(null);
            }
        }

        return $this;
    }

The child:

/**
 * @ORM\Entity(repositoryClass=SaleQuoteLineRepository::class)
 */
class SaleQuoteLine
{
    /**
     * @ORM\Id
     * @ORM\GeneratedValue
     * @ORM\Column(type="integer")
     */
    private $id;
/**
     * @ORM\ManyToOne(targetEntity=SaleQuote::class, inversedBy="saleQuoteLines", cascade={"persist"})
     * @ORM\JoinColumn(name="saleQuote_id", referencedColumnName="id", nullable=false)
     */
    private $saleQuote;

    public function getId(): ?int
    {
        return $this->id;
    }
    
    public function getSaleQuote(): ?SaleQuote
    {
        return $this->saleQuote;
    }

    public function setSaleQuote(?SaleQuote $saleQuote): self
    {
        $this->saleQuote = $saleQuote;

        return $this;
    }

The process:

$form = $this->createForm(SaleQuoteType::class, $quote);
        $form->handleRequest($request);
        if ($form->isSubmitted() && $form->isValid()) {
           // dd($form->getData());

            
            $reference = $this->quoteReferenceGenerator->generateReference();
            $quote->setReference($reference);
            $quote->setStatus(0);
            $quote->setIsMoved(0);
            $quote->setCreatedAt(new DateTime('now'));
            $em = $this->getDoctrine()->getManager($this->folder);
            $em->persist($quote);
            $em->flush();

This fail on create and update.
When I persist the children can't save the parent_id because I think parent is not persisted before.

Can you tell me where I'm wrong. Thanks.