Doctrine2 / querying discriminator value - php

Question

For a project, I need to manage "cards".
There are 2 card types : "Client card" and "Member card".
Cards can be ordered by a user of this application.
To achieve that, I created an abstract Card entity using a Type discriminator.
/* #ORM\Entity
* #ORM\Table(name="cards")
* #ORM\InheritanceType("SINGLE_TABLE")
* #ORM\DiscriminatorColumn(name="type", type="string")
* #ORM\DiscriminatorMap({"member"="MemberCard", "client"="ClientCard"})
*/
abstract class Card
{
const MEMBER = 'member';
const CLIENT = 'client';
/**
* #ORM\Id
* #ORM\GeneratedValue(strategy="IDENTITY")
* #ORM\Column(type="integer")
*/
protected $id;
/**
* #ORM\ManyToOne(targetEntity="CardsOrder", inversedBy="cards")
* #ORM\JoinColumn(name="order_id", referencedColumnName="id", onDelete="CASCADE")
*/
protected $order;
/**
* Return the card type
*
* #return string
*/
abstract public function getType();
/**
* #return mixed
*/
public function getId()
{
return $this->id;
}
/**
* #param CardsOrder $order
*
* #return $this
*/
public function setOrder(CardsOrder $order)
{
$this->order = $order;
return $this;
}
/**
* #return CardsOrder
*/
public function getOrder()
{
return $this->order;
}
}
The MemberCard entity
/**
* #ORM\Entity
*/
class MemberCard extends Card
{
/**
* #ORM\ManyToOne(targetEntity="Member", inversedBy="cards")
* #ORM\JoinColumn(name="member_id", referencedColumnName="id", onDelete="CASCADE")
*/
protected $member;
/**
* #param Member $member
*
* #return $this
*/
public function setMember(Member $member)
{
$this->member = $member;
return $this;
}
/**
* #return Member
*/
public function getMember()
{
return $this->member;
}
/**
* #return string
*/
public function getType()
{
return self::MEMBER;
}
}
The ClientCard entity
/**
* #ORM\Entity
*/
class ClientCard extends Card
{
/**
* ClientCard - client n-1 relation
*
* #ORM\ManyToOne(targetEntity="Client", inversedBy="cards")
* #ORM\JoinColumn(name="client_id", referencedColumnName="id", onDelete="CASCADE")
*/
protected $client;
/**
* #param \Admin\Crm\Entity\Client\Client $client
*
* #return $this
*/
public function setClient(Client $client)
{
$this->client = $client;
return $this;
}
/**
* #return Client
*/
public function getClient()
{
return $this->client;
}
/**
* #return string
*/
public function getType()
{
return self::CLIENT;
}
}
Now, I want to know if a member or a client has a pending ordered card (status is a binary status flag) :
public function findPendingCard($clientOrMember)
{
// $this->getRepository is the Card repository, injected in a factory
$query = $this->getRepository()->createQueryBuilder('c')
->join('c.order', 'o', 'WITH', 'BIT_AND(o.status, :oStatus) > 0')
->where('c INSTANCE OF :memberCardEntity AND c.member = :clientOrMember')
->orWhere('c INSTANCE OF :clientCardEntity AND c.client = :clientOrMember')
->setParameters([
'oStatus' => CardsOrder::OPEN,
'clientOrMember' => $clientOrMember,
'memberCardEntity' => MemberCard::class,
'clientCardEntity' => ClientCard::class,
])
->getQuery();
return $query->getOneOrNullResult();
}
But I got this error :
[Semantical Error] line 0, col 148 near 'member = :clientOrMember)': Error: Class Card has no field or association named member
Any idea what I'm doing wrong?

Answer 1

It's not so much that you're doing something wrong, but there is a method to work around the issue. You can make it possible to return the card type with the following.
In class Card add:
public function getCardType()
{
return $this->discr;
}
in class MemberCard add:
protected $discr = 'member';
in class ClientCard add:
protected $discr = 'client';