Phpstan

src/Entity/Answer.php

@@ -72,7 +72,7 @@ class Answer
         return $this;
     }
 
-    public function isRightAnswer(): ?bool
+    public function isRightAnswer(): bool
     {
         return $this->isRightAnswer;
     }

src/Entity/Elimination.php

@@ -18,21 +18,24 @@ class Elimination
     #[ORM\Column(type: UuidType::NAME, unique: true)]
     #[ORM\GeneratedValue(strategy: 'CUSTOM')]
     #[ORM\CustomIdGenerator(class: UuidGenerator::class)]
-    private ?Uuid $id = null;
+    private Uuid $id;
 
+    /** @var array<string, mixed> */
     #[ORM\Column(type: Types::JSON)]
     private array $data = [];
 
-    public function getId(): ?int
+    public function getId(): Uuid
     {
         return $this->id;
     }
 
+    /** @return array<string, mixed> */
     public function getData(): array
     {
         return $this->data;
     }
 
+    /** @param array<string, mixed> $data */
     public function setData(array $data): static
     {
         $this->data = $data;

src/Entity/GivenAnswer.php

@@ -20,7 +20,7 @@ class GivenAnswer
     #[ORM\Column(type: UuidType::NAME, unique: true)]
     #[ORM\GeneratedValue(strategy: 'CUSTOM')]
     #[ORM\CustomIdGenerator(class: UuidGenerator::class)]
-    private ?Uuid $id = null;
+    private Uuid $id;
 
     #[ORM\ManyToOne(inversedBy: 'givenAnswers')]
     #[ORM\JoinColumn(nullable: false)]
@@ -35,7 +35,7 @@ class GivenAnswer
     private ?Answer $answer = null;
 
     #[ORM\Column(type: Types::DATETIME_IMMUTABLE, nullable: false)]
-    private \DateTimeInterface $created;
+    private \DateTimeImmutable $created;
 
     public function getId(): ?Uuid
     {
@@ -78,7 +78,7 @@ class GivenAnswer
         return $this;
     }
 
-    public function getCreated(): \DateTimeInterface
+    public function getCreated(): \DateTimeImmutable
     {
         return $this->created;
     }

src/Entity/Question.php

@@ -103,7 +103,7 @@ class Question
             return 'This question has no answers';
         }
 
-        $correctAnswers = $this->answers->filter(static fn (Answer $answer): ?bool => $answer->isRightAnswer())->count();
+        $correctAnswers = $this->answers->filter(static fn (Answer $answer): bool => $answer->isRightAnswer())->count();
 
         if (0 === $correctAnswers) {
             return 'This question has no correct answers';

src/Entity/User.php

@@ -76,13 +76,16 @@ class User implements UserInterface, PasswordAuthenticatedUserInterface
      */
     public function getUserIdentifier(): string
     {
-        return $this->email;
+        /** @var non-empty-string $identifier */
+        $identifier = $this->email;
+
+        return $identifier;
     }
 
     /**
      * @see UserInterface
      *
-     * @return non-empty-list<string>
+     * @return non-empty-array<int<0, max>, string>
      */
     public function getRoles(): array
     {