Api platform, react admin - create new Entity with relation - symfony

Question

I am afraid I might have ran into some sort of XY problem...
I have an entity "Asset" with related "AssetType" entity (One AssetType can have many Asset entities)
When creating new entity with POST method, the request fails with "SQLSTATE[23000]: Integrity constraint violation: 1048 Column 'type_id' cannot be null"
Data posted from react-admin (POST to /api/assets route):
{
"data":{
"type":"assets",
"attributes":{
"name":"asdf",
"description":"LoraWAN enabled sensor"
},
"relationships":{
"asset_type":{
"data":{
"id":"/api/asset_types/a71b47b8-b9fb-11ea-b4d5-e6b986f12daf",
"type":"asset_types"
}
}
}
}
}
I understand that there is data lost somewhere doing deserialization of object, but cannot figure out where. Also I have identical set of entities (Gateway and Location where each Location can have multiple Gateways) and the creation of new entities work as expected...
New to Symfony & api-platform, any help appreciated.
Asset entity is set tup to be visible in api-platform:
/**
* #ApiResource(
* collectionOperations={"get", "post"},
* itemOperations={"get", "put", "delete"},
* normalizationContext={"groups"={"read"}},
* denormalizationContext={"groups"={"write"}}
* )
* #ORM\Entity(repositoryClass="App\Repository\AssetRepository")
*/
class Asset
{
/**
* #ORM\Id
* #ORM\Column(type="uuid_binary_ordered_time", nullable=false, unique=true)
* #ORM\GeneratedValue(strategy="CUSTOM")
* #ORM\CustomIdGenerator(class="Ramsey\Uuid\Doctrine\UuidOrderedTimeGenerator")
* #Groups({"read"})
*/
private $uuid;
/**
* #ORM\ManyToOne(targetEntity="App\Entity\AssetType", inversedBy="assets", cascade={"persist"})
* #ORM\JoinColumn(name="type_id", referencedColumnName="uuid", nullable=false)
*
* #Groups({"read", "write"})
*/
private $assetType;
}
AssetType entity:
/**
* #ApiResource(
* normalizationContext={"groups"={"read"}},
* denormalizationContext={"groups"={"write"}}
* )
* #ORM\Entity(repositoryClass="App\Repository\AssetTypeRepository")
*/
class AssetType
{
/**
* #ORM\Id()
* #ORM\Column(name="uuid", type="uuid_binary_ordered_time", nullable=false, unique=true)
* #ORM\GeneratedValue(strategy="CUSTOM")
* #ORM\CustomIdGenerator(class="Ramsey\Uuid\Doctrine\UuidOrderedTimeGenerator")
* #Groups({"read", "write"})
*/
private $uuid;
/**
* #ORM\Column(type="string", length=255, nullable=true)
* #Groups({"read", "write"})
*/
private $name;
/**
* #ORM\OneToMany(targetEntity="App\Entity\Asset", mappedBy="assetType")
*/
private $assets;
public function __construct()
{
$this->assets = new ArrayCollection();
}
public function getUuid()
{
return $this->uuid;
}
public function setUuid($uuid): self
{
$this->uuid = $uuid;
return $this;
}
public function getAssets(): Collection
{
return $this->assets;
}
public function addAsset(Asset $asset): self
{
...
}
public function removeAsset(Asset $asset): self
{
...
}

Answer 1

In case anyone sumbles across similar problem - the reason for missing values was property naming and its normalization.
Relationship data posted contains key "asset_type" which needs to be converted to camelCase "assetType" in react-admin's dataProvider (that's the approach I took).