Started to increase the phpstan level

src/Controller/AdminPages/BaseAdminController.php

@@ -327,9 +327,8 @@ abstract class BaseAdminController extends AbstractController
             try {
                 $errors = $importer->importFileAndPersistToDB($file, $options);
 
-                /** @var ConstraintViolationList $error */
                 foreach ($errors as $name => $error) {
-                    foreach ($error['violations'] as $violation) {
+                    foreach ($error as $violation) {
                         $this->addFlash('error', $name.': '.$violation->getMessage());
                     }
                 }

src/DataTables/Filters/Constraints/EntityConstraint.php

@@ -40,8 +40,8 @@ class EntityConstraint extends AbstractConstraint
      * @param  class-string<T>  $class
      * @param  string  $property
      * @param  string|null  $identifier
-     * @param  null  $value
-     * @param  string  $operator
+     * @param  null|T  $value
+     * @param  string|null  $operator
      */
     public function __construct(protected ?NodesListBuilder $nodesListBuilder,
         protected string $class,
@@ -82,9 +82,10 @@ class EntityConstraint extends AbstractConstraint
     }
 
     /**
-     * @param  T|null $value
+     * @param  AbstractDBElement|null $value
+     * @phpstan-param T|null $value
      */
-    public function setValue(?AbstractDBElement $value): void
+    public function setValue(AbstractDBElement|null $value): void
     {
         if (!$value instanceof $this->class) {
             throw new \InvalidArgumentException('The value must be an instance of ' . $this->class);

src/DataTables/Filters/Constraints/FilterTrait.php

@@ -29,7 +29,7 @@ trait FilterTrait
 
     protected bool $useHaving = false;
 
-    public function useHaving($value = true): self
+    public function useHaving($value = true): static
     {
         $this->useHaving = $value;
         return $this;

src/DataTables/Filters/PartFilter.php

@@ -85,6 +85,7 @@ class PartFilter implements FilterInterface
     protected IntConstraint $attachmentsCount;
     protected EntityConstraint $attachmentType;
     protected TextConstraint $attachmentName;
+
     /** @var ArrayCollection<int, ParameterConstraint> */
     protected ArrayCollection $parameters;
     protected IntConstraint $parametersCount;

src/Entity/Attachments/Attachment.php

@@ -37,6 +37,7 @@ use LogicException;
 /**
  * Class Attachment.
  * @see \App\Tests\Entity\Attachments\AttachmentTest
+ * @template-covariant  T of AttachmentContainingDBElement
  */
 #[ORM\Entity(repositoryClass: AttachmentRepository::class)]
 #[ORM\InheritanceType('SINGLE_TABLE')]
@@ -75,9 +76,9 @@ abstract class Attachment extends AbstractNamedDBElement
 
     /**
      * @var string The class of the element that can be passed to this attachment. Must be overridden in subclasses.
-     *
+     * @phpstan-var class-string<T>
      */
-    protected const ALLOWED_ELEMENT_CLASS = '';
+    protected const ALLOWED_ELEMENT_CLASS = AttachmentContainingDBElement::class;
 
     /**
      * @var string|null the original filename the file had, when the user uploaded it
@@ -101,6 +102,7 @@ abstract class Attachment extends AbstractNamedDBElement
 
     /**
      * ORM mapping is done in subclasses (like PartAttachment).
+     * @phpstan-param T|null $element
      */
     protected ?AttachmentContainingDBElement $element = null;
 
@@ -116,7 +118,7 @@ abstract class Attachment extends AbstractNamedDBElement
     public function __construct()
     {
         //parent::__construct();
-        if ('' === static::ALLOWED_ELEMENT_CLASS) {
+        if (AttachmentContainingDBElement::class === static::ALLOWED_ELEMENT_CLASS) {
             throw new LogicException('An *Attachment class must override the ALLOWED_ELEMENT_CLASS const!');
         }
     }

src/Entity/Attachments/AttachmentContainingDBElement.php

@@ -31,13 +31,17 @@ use Doctrine\Common\Collections\Collection;
 use Doctrine\ORM\Mapping as ORM;
 use Symfony\Component\Serializer\Annotation\Groups;
 
+/**
+ * @template-covariant AT of Attachment
+ */
 #[ORM\MappedSuperclass]
 abstract class AttachmentContainingDBElement extends AbstractNamedDBElement implements HasMasterAttachmentInterface, HasAttachmentsInterface
 {
     use MasterAttachmentTrait;
 
     /**
-     * @var Attachment[]|Collection
+     * @var Collection<int, Attachment>
+     * @phpstan-var Collection<int, AT>
      * ORM Mapping is done in subclasses (e.g. Part)
      */
     #[Groups(['full'])]
@@ -76,7 +80,7 @@ abstract class AttachmentContainingDBElement extends AbstractNamedDBElement impl
     /**
      * Gets all attachments associated with this element.
      *
-     * @return Attachment[]|Collection
+     * @return Collection<Attachment>
      */
     public function getAttachments(): Collection
     {

src/Entity/Attachments/AttachmentType.php

@@ -35,6 +35,7 @@ use Symfony\Component\Validator\Constraints as Assert;
 /**
  * Class AttachmentType.
  * @see \App\Tests\Entity\Attachments\AttachmentTypeTest
+ * @extends AbstractStructuralDBElement<AttachmentTypeAttachment, AttachmentTypeParameter>
  */
 #[ORM\Entity(repositoryClass: StructuralDBElementRepository::class)]
 #[ORM\Table(name: '`attachment_types`')]

src/Entity/Attachments/AttachmentTypeAttachment.php

@@ -27,6 +27,7 @@ use Symfony\Bridge\Doctrine\Validator\Constraints\UniqueEntity;
 
 /**
  * A attachment attached to an attachmentType element.
+ * @extends Attachment<AttachmentType>
  */
 #[UniqueEntity(['name', 'attachment_type', 'element'])]
 #[ORM\Entity]

src/Entity/Attachments/CategoryAttachment.php

@@ -28,6 +28,7 @@ use Symfony\Bridge\Doctrine\Validator\Constraints\UniqueEntity;
 
 /**
  * An attachment attached to a category element.
+ * @extends Attachment<Category>
  */
 #[UniqueEntity(['name', 'attachment_type', 'element'])]
 #[ORM\Entity]

src/Entity/Base/AbstractCompany.php

@@ -22,6 +22,8 @@ declare(strict_types=1);
 
 namespace App\Entity\Base;
 
+use App\Entity\Attachments\Attachment;
+use App\Entity\Parameters\AbstractParameter;
 use Doctrine\DBAL\Types\Types;
 use Doctrine\ORM\Mapping as ORM;
 use Symfony\Component\Serializer\Annotation\Groups;
@@ -30,6 +32,10 @@ use Symfony\Component\Validator\Constraints as Assert;
 
 /**
  * This abstract class is used for companies like suppliers or manufacturers.
+ *
+ * @template-covariant AT of Attachment
+ * @template-covariant PT of AbstractParameter
+ * @extends AbstractPartsContainingDBElement<AT, PT>
  */
 #[ORM\MappedSuperclass]
 abstract class AbstractCompany extends AbstractPartsContainingDBElement

src/Entity/Base/AbstractPartsContainingDBElement.php

@@ -22,13 +22,19 @@ declare(strict_types=1);
 
 namespace App\Entity\Base;
 
+use App\Entity\Attachments\Attachment;
+use App\Entity\Attachments\AttachmentContainingDBElement;
+use App\Entity\Parameters\AbstractParameter;
+use App\Entity\Parameters\ParametersTrait;
 use App\Repository\AbstractPartsContainingRepository;
 use Doctrine\Common\Collections\Collection;
 use Doctrine\ORM\Mapping as ORM;
 use Symfony\Component\Serializer\Annotation\Groups;
 
 /**
- * Class PartsContainingDBElement.
+ * @template-covariant AT of Attachment
+ * @template-covariant PT of AbstractParameter
+ * @extends AbstractStructuralDBElement<AT, PT>
  */
 #[ORM\MappedSuperclass(repositoryClass: AbstractPartsContainingRepository::class)]
 abstract class AbstractPartsContainingDBElement extends AbstractStructuralDBElement

src/Entity/Base/AbstractStructuralDBElement.php

@@ -22,12 +22,16 @@ declare(strict_types=1);
 
 namespace App\Entity\Base;
 
+use App\Entity\Attachments\Attachment;
+use App\Entity\Parameters\AbstractParameter;
 use App\Repository\StructuralDBElementRepository;
 use App\EntityListeners\TreeCacheInvalidationListener;
 use Doctrine\DBAL\Types\Types;
 use App\Entity\Attachments\AttachmentContainingDBElement;
 use App\Entity\Parameters\ParametersTrait;
 use App\Validator\Constraints\NoneOfItsChildren;
+use Symfony\Component\Validator\Constraints as Assert;
+use Symfony\Component\Validator\Constraints\Valid;
 use function count;
 use Doctrine\Common\Collections\ArrayCollection;
 use Doctrine\Common\Collections\Collection;
@@ -48,6 +52,12 @@ use Symfony\Component\Serializer\Annotation\Groups;
  *
  *
  * @see \App\Tests\Entity\Base\AbstractStructuralDBElementTest
+ *
+ * @template-covariant AT of Attachment
+ * @template-covariant PT of AbstractParameter
+ * @template-use ParametersTrait<PT>
+ * @extends AttachmentContainingDBElement<AT>
+ * @uses ParametersTrait<PT>
  */
 #[UniqueEntity(fields: ['name', 'parent'], ignoreNull: false, message: 'structural.entity.unique_name')]
 #[ORM\MappedSuperclass(repositoryClass: StructuralDBElementRepository::class)]
@@ -87,15 +97,29 @@ abstract class AbstractStructuralDBElement extends AttachmentContainingDBElement
      * We can not define the mapping here, or we will get an exception. Unfortunately we have to do the mapping in the
      * subclasses.
      *
-     * @var Collection<AbstractStructuralDBElement>
+     * @var Collection<int, AbstractStructuralDBElement>
+     * @phpstan-var Collection<int, static>
      */
     #[Groups(['include_children'])]
     protected Collection $children;
 
+    /**
+     * @var AbstractStructuralDBElement|null
+     * @phpstan-var static|null
+     */
     #[Groups(['include_parents', 'import'])]
     #[NoneOfItsChildren]
     protected ?AbstractStructuralDBElement $parent = null;
 
+    /**
+     * Mapping done in subclasses.
+     *
+     * @var Collection<int, AbstractParameter>
+     * @phpstan-var Collection<int, PT>
+     */
+    #[Assert\Valid()]
+    protected Collection $parameters;
+
     /** @var string[] all names of all parent elements as an array of strings,
      *  the last array element is the name of the element itself
      */
@@ -314,9 +338,8 @@ abstract class AbstractStructuralDBElement extends AttachmentContainingDBElement
     /**
      * Sets the new parent object.
      *
-     * @param  AbstractStructuralDBElement|null  $new_parent  The new parent object
-     *
-     * @return AbstractStructuralDBElement
+     * @param  static|null  $new_parent  The new parent object
+     * @return $this
      */
     public function setParent(?self $new_parent): self
     {
@@ -325,6 +348,11 @@ abstract class AbstractStructuralDBElement extends AttachmentContainingDBElement
             throw new \InvalidArgumentException('You can not use one of the element childs as parent!');
         } */
 
+        //Ensure that the parent is of the same type as this element
+        if (!$new_parent instanceof static) {
+            throw new \InvalidArgumentException('The parent must be of the same type as this element!');
+        }
+
         $this->parent = $new_parent;
 
         //Add this element as child to the new parent
@@ -340,7 +368,7 @@ abstract class AbstractStructuralDBElement extends AttachmentContainingDBElement
      *
      * @param  string  $new_comment  the new comment
      *
-     * @return AbstractStructuralDBElement
+     * @return $this
      */
     public function setComment(string $new_comment): self
     {

src/Entity/LabelSystem/LabelProfile.php

@@ -52,6 +52,9 @@ use Doctrine\ORM\Mapping as ORM;
 use Symfony\Bridge\Doctrine\Validator\Constraints\UniqueEntity;
 use Symfony\Component\Validator\Constraints as Assert;
 
+/**
+ * @extends AttachmentContainingDBElement<LabelAttachment>
+ */
 #[UniqueEntity(['name', 'options.supported_element'])]
 #[ORM\Entity(repositoryClass: LabelProfileRepository::class)]
 #[ORM\EntityListeners([TreeCacheInvalidationListener::class])]

src/Entity/LogSystem/PartStockChangedLogEntry.php

@@ -86,7 +86,7 @@ class PartStockChangedLogEntry extends AbstractLogEntry
      * @param  float  $new_stock The new stock of the lot.
      * @param  float  $new_total_part_instock The new total instock of the part.
      * @param  string  $comment The comment associated with the change.
-     * @return static
+     * @return self
      */
     public static function add(PartLot $lot, float $old_stock, float $new_stock, float $new_total_part_instock, string $comment): self
     {
@@ -100,7 +100,7 @@ class PartStockChangedLogEntry extends AbstractLogEntry
      * @param  float  $new_stock The new stock of the lot.
      * @param  float  $new_total_part_instock The new total instock of the part.
      * @param  string  $comment The comment associated with the change.
-     * @return static
+     * @return self
      */
     public static function withdraw(PartLot $lot, float $old_stock, float $new_stock, float $new_total_part_instock, string $comment): self
     {

src/Entity/Parameters/ParametersTrait.php

@@ -44,20 +44,25 @@ namespace App\Entity\Parameters;
 use Doctrine\Common\Collections\Collection;
 use Symfony\Component\Validator\Constraints as Assert;
 
+/**
+ * @template-covariant T of AbstractParameter
+ */
 trait ParametersTrait
 {
     /**
      * Mapping done in subclasses.
      *
      * @var Collection<int, AbstractParameter>
+     * @phpstan-var Collection<int, T>
      */
     #[Assert\Valid]
     protected Collection $parameters;
 
     /**
      *  Return all associated specifications.
+     * @return Collection<int, AbstractParameter>
+     * @phpstan-return Collection<int, T>
      *
-     * @psalm-return Collection<int, AbstractParameter>
      */
     public function getParameters(): Collection
     {
@@ -66,7 +71,7 @@ trait ParametersTrait
 
     /**
      * Add a new parameter information.
-     *
+     * @phpstan-param T $parameter
      * @return $this
      */
     public function addParameter(AbstractParameter $parameter): self
@@ -77,6 +82,9 @@ trait ParametersTrait
         return $this;
     }
 
+    /**
+     * @phpstan-param T $parameter
+     */
     public function removeParameter(AbstractParameter $parameter): self
     {
         $this->parameters->removeElement($parameter);
@@ -84,6 +92,10 @@ trait ParametersTrait
         return $this;
     }
 
+    /**
+     * @return array<string, array<int, AbstractParameter>>
+     * @phpstan-return array<string, array<int, T>>
+     */
     public function getGroupedParameters(): array
     {
         $tmp = [];

src/Entity/Parts/Category.php

@@ -35,7 +35,9 @@ use Symfony\Component\Serializer\Annotation\Groups;
 use Symfony\Component\Validator\Constraints as Assert;
 
 /**
- * Class AttachmentType.
+ * This entity describes a category, a part can belong to, which is used to group parts by their function.
+ *
+ * @extends AbstractPartsContainingDBElement<CategoryAttachment, CategoryParameter>
  */
 #[ORM\Entity(repositoryClass: CategoryRepository::class)]
 #[ORM\Table(name: '`categories`')]
@@ -43,9 +45,6 @@ use Symfony\Component\Validator\Constraints as Assert;
 #[ORM\Index(name: 'category_idx_parent_name', columns: ['parent_id', 'name'])]
 class Category extends AbstractPartsContainingDBElement
 {
-    /**
-     * @var Collection
-     */
     #[ORM\OneToMany(targetEntity: 'Category', mappedBy: 'parent')]
     #[ORM\OrderBy(['name' => 'ASC'])]
     protected Collection $children;

src/Entity/Parts/Footprint.php

@@ -33,7 +33,9 @@ use Doctrine\ORM\Mapping as ORM;
 use Symfony\Component\Validator\Constraints as Assert;
 
 /**
- * Class Footprint.
+ * This entity represents a footprint of a part (its physical dimensions and shape).
+ *
+ * @extends AbstractPartsContainingDBElement<FootprintAttachment, FootprintParameter>
  */
 #[ORM\Entity(repositoryClass: FootprintRepository::class)]
 #[ORM\Table('`footprints`')]
@@ -45,9 +47,6 @@ class Footprint extends AbstractPartsContainingDBElement
     #[ORM\JoinColumn(name: 'parent_id')]
     protected ?AbstractStructuralDBElement $parent = null;
 
-    /**
-     * @var Collection
-     */
     #[ORM\OneToMany(targetEntity: 'Footprint', mappedBy: 'parent')]
     #[ORM\OrderBy(['name' => 'ASC'])]
     protected Collection $children;

src/Entity/Parts/Manufacturer.php

@@ -33,7 +33,9 @@ use Doctrine\ORM\Mapping as ORM;
 use Symfony\Component\Validator\Constraints as Assert;
 
 /**
- * Class Manufacturer.
+ * This entity represents a manufacturer of a part (The company that produces the part).
+ *
+ * @extends AbstractCompany<ManufacturerAttachment, ManufacturerParameter>
  */
 #[ORM\Entity(repositoryClass: ManufacturerRepository::class)]
 #[ORM\Table('`manufacturers`')]
@@ -45,9 +47,6 @@ class Manufacturer extends AbstractCompany
     #[ORM\JoinColumn(name: 'parent_id')]
     protected ?AbstractStructuralDBElement $parent = null;
 
-    /**
-     * @var Collection
-     */
     #[ORM\OneToMany(targetEntity: 'Manufacturer', mappedBy: 'parent')]
     #[ORM\OrderBy(['name' => 'ASC'])]
     protected Collection $children;

src/Entity/Parts/MeasurementUnit.php

@@ -38,6 +38,8 @@ use Symfony\Component\Validator\Constraints as Assert;
 /**
  * This unit represents the unit in which the amount of parts in stock are measured.
  * This could be something like N, grams, meters, etc...
+ *
+ * @extends AbstractPartsContainingDBElement<MeasurementUnitAttachment,MeasurementUnitParameter>
  */
 #[UniqueEntity('unit')]
 #[ORM\Entity(repositoryClass: MeasurementUnitRepository::class)]
@@ -72,9 +74,6 @@ class MeasurementUnit extends AbstractPartsContainingDBElement
     #[ORM\Column(type: Types::BOOLEAN, name: 'use_si_prefix')]
     protected bool $use_si_prefix = false;
 
-    /**
-     * @var Collection
-     */
     #[ORM\OneToMany(targetEntity: 'MeasurementUnit', mappedBy: 'parent', cascade: ['persist'])]
     #[ORM\OrderBy(['name' => 'ASC'])]
     protected Collection $children;

src/Entity/Parts/Storelocation.php

@@ -36,7 +36,8 @@ use Symfony\Component\Serializer\Annotation\Groups;
 use Symfony\Component\Validator\Constraints as Assert;
 
 /**
- * Class Store location.
+ * This entity represents a storage location, where parts can be stored.
+ * @extends AbstractPartsContainingDBElement<StorelocationAttachment, StorelocationParameter>
  */
 #[ORM\Entity(repositoryClass: StorelocationRepository::class)]
 #[ORM\Table('`storelocations`')]
@@ -44,9 +45,6 @@ use Symfony\Component\Validator\Constraints as Assert;
 #[ORM\Index(name: 'location_idx_parent_name', columns: ['parent_id', 'name'])]
 class Storelocation extends AbstractPartsContainingDBElement
 {
-    /**
-     * @var Collection
-     */
     #[ORM\OneToMany(targetEntity: 'Storelocation', mappedBy: 'parent')]
     #[ORM\OrderBy(['name' => 'ASC'])]
     protected Collection $children;

src/Entity/Parts/Supplier.php

@@ -39,7 +39,9 @@ use Symfony\Component\Serializer\Annotation\Groups;
 use Symfony\Component\Validator\Constraints as Assert;
 
 /**
- * Class Supplier.
+ * This entity represents a supplier of parts (the company that sells the parts).
+ *
+ * @extends AbstractCompany<SupplierAttachment, SupplierParameter>
  */
 #[ORM\Entity(repositoryClass: SupplierRepository::class)]
 #[ORM\Table('`suppliers`')]
@@ -47,9 +49,6 @@ use Symfony\Component\Validator\Constraints as Assert;
 #[ORM\Index(name: 'supplier_idx_parent_name', columns: ['parent_id', 'name'])]
 class Supplier extends AbstractCompany
 {
-    /**
-     * @var Collection
-     */
     #[ORM\OneToMany(targetEntity: 'Supplier', mappedBy: 'parent')]
     #[ORM\OrderBy(['name' => 'ASC'])]
     protected Collection $children;

src/Entity/PriceInformations/Currency.php

@@ -38,6 +38,8 @@ use Symfony\Component\Validator\Constraints as Assert;
 
 /**
  * This entity describes a currency that can be used for price information.
+ *
+ * @extends AbstractStructuralDBElement<CurrencyAttachment, CurrencyParameter>
  */
 #[UniqueEntity('iso_code')]
 #[ORM\Entity]

src/Entity/ProjectSystem/Project.php

@@ -37,15 +37,14 @@ use Symfony\Component\Validator\Constraints as Assert;
 use Symfony\Component\Validator\Context\ExecutionContextInterface;
 
 /**
- * Class AttachmentType.
+ * This class represents a project in the database.
+ *
+ * @extends AbstractStructuralDBElement<ProjectAttachment, ProjectParameter>
  */
 #[ORM\Entity(repositoryClass: DeviceRepository::class)]
 #[ORM\Table(name: 'projects')]
 class Project extends AbstractStructuralDBElement
 {
-    /**
-     * @var Collection
-     */
     #[ORM\OneToMany(targetEntity: 'Project', mappedBy: 'parent')]
     #[ORM\OrderBy(['name' => 'ASC'])]
     protected Collection $children;

src/Entity/UserSystem/Group.php

@@ -37,6 +37,8 @@ use Symfony\Component\Validator\Constraints as Assert;
 
 /**
  * This entity represents a user group.
+ *
+ * @extends AbstractStructuralDBElement<GroupAttachment, GroupParameter>
  */
 #[ORM\Entity]
 #[ORM\Table('`groups`')]
@@ -45,9 +47,6 @@ use Symfony\Component\Validator\Constraints as Assert;
 #[NoLockout()]
 class Group extends AbstractStructuralDBElement implements HasPermissionsInterface
 {
-    /**
-     * @var Collection<int, self>
-     */
     #[ORM\OneToMany(targetEntity: 'Group', mappedBy: 'parent')]
     #[ORM\OrderBy(['name' => 'ASC'])]
     protected Collection $children;

src/Entity/UserSystem/User.php

@@ -59,6 +59,8 @@ use Jbtronics\TFAWebauthn\Model\TwoFactorInterface as WebauthnTwoFactorInterface
  * This entity represents a user, which can log in and have permissions.
  * Also, this entity is able to save some information about the user, like the names, email-address and other info.
  * @see \App\Tests\Entity\UserSystem\UserTest
+ *
+ * @extends AttachmentContainingDBElement<UserAttachment>
  */
 #[UniqueEntity('name', message: 'validator.user.username_already_used')]
 #[ORM\Entity(repositoryClass: UserRepository::class)]

src/Repository/DBElementRepository.php

@@ -52,6 +52,7 @@ class DBElementRepository extends EntityRepository
      * You should only use it to undelete former existing elements, everything else is most likely a bad idea!
      *
      * @param AbstractDBElement $element The element whose ID should be changed
+     * @phpstan-param TEntityClass $element
      * @param int               $new_id  The new ID
      */
     public function changeID(AbstractDBElement $element, int $new_id): void
@@ -73,6 +74,7 @@ class DBElementRepository extends EntityRepository
      * Find all elements that match a list of IDs.
      *
      * @return AbstractDBElement[]
+     * @phpstan-return list<TEntityClass>
      */
     public function getElementsFromIDArray(array $ids): array
     {

src/Services/ImportExportSystem/EntityImporter.php

@@ -26,6 +26,8 @@ use App\Entity\Base\AbstractNamedDBElement;
 use App\Entity\Base\AbstractStructuralDBElement;
 use App\Entity\Parts\Category;
 use App\Entity\Parts\Part;
+use Composer\Semver\Constraint\Constraint;
+use Symfony\Component\Validator\ConstraintViolationList;
 use Symplify\EasyCodingStandard\ValueObject\Option;
 use function count;
 use Doctrine\ORM\EntityManagerInterface;
@@ -238,7 +240,7 @@ class EntityImporter
      * @param array  $options    options for the import process
      * @param AbstractNamedDBElement[]  $entities  The imported entities are returned in this array
      *
-     * @return array An associative array containing an ConstraintViolationList and the entity name as key are returned,
+     * @return array<string, ConstraintViolationList> An associative array containing an ConstraintViolationList and the entity name as key are returned,
      *               if an error happened during validation. When everything was successfully, the array should be empty.
      */
     public function importFileAndPersistToDB(File $file, array $options = [], array &$entities = []): array

src/Twig/EntityExtension.php

@@ -123,6 +123,6 @@ final class EntityExtension extends AbstractExtension
             }
         }
 
-        return false;
+        return null;
     }
 }

src/Twig/TwigCoreExtension.php

@@ -54,7 +54,7 @@ final class TwigCoreExtension extends AbstractExtension
              */
             new TwigTest('instanceof', static fn($var, $instance) => $var instanceof $instance),
             /* Checks if a given variable is an object. E.g. `x is object` */
-            new TwigTest('object', static fn($var): object => is_object($var)),
+            new TwigTest('object', static fn($var): bool => is_object($var)),
         ];
     }