Uncaught exception 'Error' with message 'Call to a member function matching() on null'

[muratdemir0]

Hello folks,

I try to upgrade orm from 2.4.8 to 2.7.5 however I'm getting an error on production env. If you have any idea or suggestion that would be more helpful.

My setup
PHP: 7.4.33
symfony: 2.8.52
doctrine/orm: 2.7.5
doctrine/doctrine-bundle: 1.9.1
doctrine/deprecations: 1.0.0
doctrine/annotations: 1.14.2
doctrine/reflection: 1.2.3
doctrine/event-manager: 1.2.0
doctrine/collections: 1.8.0
doctrine/cache: 1.13.0
doctrine/persistence: 1.3.8
doctrine/inflector: 1.4.4
doctrine/common: 2.13.3
doctrine/instantiator: 1.5.0
doctrine/dbal: 2.13.9

USED:

public function getActiveProductEstimatedDelivery() { return $this->getProductEstimatedDeliveries() ->matching( Criteria::create() ->where(Criteria::expr()->eq('active', true)) )->first(); }

ERROR:
Error: Uncaught exception 'Error' with message 'Call to a member function matching() on null' in /var/www/html/vendor/doctrine/orm/lib/Doctrine/ORM/PersistentCollection.php:652 in Doctrine\ORM\PersistentCollection::matching called at /var/www/html/src/Modanisa/Bundle/CoreBundle/Entity/Product/ProductFilter.php (246)

[mpdude]

Find out why the getProductEstimatedDeliveries() method returns a null value.

[muratdemir0]

the method is initialized as an array collection in the constructor method.

/** * ProductFilter constructor. */ public function __construct() { $this->productEstimatedDeliveries = new ArrayCollection(); }

[mpdude]

And what does the getProductEstimatedDeliveries method return?