ORM ManyToOne Unidirectional fetchAll Object array does not render in phtml Zend Framework 3 - orm

Question

The application has built in ZF3. I have to entity with ManyToOne relationship using ORM. The issue is when i render through controller and and if fetch data via index it gives okay result but when i assign that to view and trying to render at phtml it throws an error/
/**
* Subscriptions
*
* #ORM\Table(name="subscriptions", indexes={#ORM\Index(name="CUST_ID", columns={"customer_id"}),#ORM\Index(name="SUB_TYPE_ID", columns={"subscription_type_id"})})
* #ORM\Entity
*/
class Subscriptions
{
/**
* #var integer
*
* #ORM\Column(name="id", type="integer", nullable=false)
* #ORM\Id
* #ORM\GeneratedValue(strategy="IDENTITY")
*/
private $id;
/**
* #var \Application\Entity\SubscriptionType
*
* #ORM\ManyToOne(targetEntity="Application\Entity\SubscriptionType")
* #ORM\JoinColumns({
* #ORM\JoinColumn(name="subscription_type_id", referencedColumnName="id")
* })
*/
protected $subscriptionType;
//set
public function setSubscriptionType(\Application\Entity\SubscriptionType $subscriptionType = null)
{
$this->subscriptionType = $subscriptionType;
return $this;
}
//get
public function getSubscriptionType(){
return $this->subscriptionType;
}
//other setter and getter....
}
Another Class
/**
* SubscriptionType
*
* #ORM\Table(name="subscription_type")
* #ORM\Entity
*/
class SubscriptionType
{
/**
* #var integer
*
* #ORM\Column(name="id", type="integer", nullable=false)
* #ORM\Id
* #ORM\GeneratedValue(strategy="IDENTITY")
*/
private $id;
/**
* #var string
*
* #ORM\Column(name="description", type="text", length=65535, nullable=true)
*/
private $description;
/**
* Get id
*enter code here
* #return integer
*/
public function getId()
{
return $this->id;
}
/**
* Set description
*
* #param string $description
*
* #return SubscriptionType
*/
public function setDescription($description)
{
$this->description = $description;
return $this;
}
}
Now at controller i have wrote...
//some initiations
class AdminController extends AbstractActionController
{
//other initiations including __construct....
public function usersubscriptionsAction(){
$this->subscriptions = $this->entityManager->getRepository(Subscriptions::class)->findAll();
/*
foreach($this->subscriptions as $subscription){
//if i am checking with this it gives proper output
echo $subscription->getSubscriptionType()->getDescription();
die();
}
*/
return new ViewModel(
array(
"subscriptions" => $this->subscriptions
)
);
}
}
///i have phtml file
<?php foreach ($subscriptions as $subscription): ?>
//below line throwing an error
<?php echo $subscription->getSubscriptionType()->getDescription(); ?>
<?php endforeach; ?>
when i run it throw an erro message
Call to a member function getDescription() on null

Answer 1

You've got the relation mapping incorrect. Corrected the property annotation below:
/**
* #var \Application\Entity\SubscriptionType
*
* #ORM\ManyToOne(targetEntity="Application\Entity\SubscriptionType")
* #ORM\JoinColumn(name="subscription_type_id", referencedColumnName="id")
*/
protected $subscriptionType;
You had
/**
* #var \Application\Entity\SubscriptionType
*
* #ORM\ManyToOne(targetEntity="Application\Entity\SubscriptionType")
* #ORM\JoinColumns({
* #ORM\JoinColumn(name="subscription_type_id", referencedColumnName="id")
* })
*/
protected $subscriptionType;
The #ORM\JoinColumns is used for when you have a join with multiple columns, please see the docs. Though, the most common usage of JoinColumns is for a JoinTable.