Improve EntityColumnRule for enums

src/Rules/Doctrine/ORM/EntityColumnRule.php

@@ -9,6 +9,7 @@
 use PHPStan\Rules\Rule;
 use PHPStan\Rules\RuleErrorBuilder;
 use PHPStan\Type\ArrayType;
+use PHPStan\Type\Constant\ConstantStringType;
 use PHPStan\Type\Doctrine\DescriptorNotRegisteredException;
 use PHPStan\Type\Doctrine\DescriptorRegistry;
 use PHPStan\Type\Doctrine\ObjectMetadataResolver;
@@ -21,10 +22,14 @@
 use PHPStan\Type\TypehintHelper;
 use PHPStan\Type\TypeTraverser;
 use PHPStan\Type\TypeUtils;
+use PHPStan\Type\UnionType;
 use PHPStan\Type\VerbosityLevel;
 use Throwable;
+use function count;
 use function get_class;
 use function in_array;
+use function is_array;
+use function is_string;
 use function sprintf;
 
 /**
@@ -100,6 +105,26 @@ public function processNode(Node $node, Scope $scope): array
 		$writableToPropertyType = $descriptor->getWritableToPropertyType();
 		$writableToDatabaseType = $descriptor->getWritableToDatabaseType();
 
+		if ($fieldMapping['type'] === 'enum') {
+			$values = $fieldMapping['options']['values'] ?? null;
+			if (is_array($values)) {
+				$enumTypes = [];
+				foreach ($values as $value) {
+					if (!is_string($value)) {
+						$enumTypes = [];
+						break;
+					}
+
+					$enumTypes[] = new ConstantStringType($value);
+				}
+
+				if (count($enumTypes) > 0) {
+					$writableToPropertyType = new UnionType($enumTypes);
+					$writableToDatabaseType = new UnionType($enumTypes);
+				}
+			}
+		}
+
 		$enumTypeString = $fieldMapping['enumType'] ?? null;
 		if ($enumTypeString !== null) {
 			if ($writableToDatabaseType->isArray()->no() && $writableToPropertyType->isArray()->no()) {

tests/Rules/Doctrine/ORM/EntityColumnRuleTest.php

@@ -18,6 +18,7 @@
 use PHPStan\Type\Doctrine\Descriptors\DateTimeType;
 use PHPStan\Type\Doctrine\Descriptors\DateType;
 use PHPStan\Type\Doctrine\Descriptors\DecimalType;
+use PHPStan\Type\Doctrine\Descriptors\EnumType;
 use PHPStan\Type\Doctrine\Descriptors\IntegerType;
 use PHPStan\Type\Doctrine\Descriptors\JsonType;
 use PHPStan\Type\Doctrine\Descriptors\Ramsey\UuidTypeDescriptor;
@@ -26,6 +27,7 @@
 use PHPStan\Type\Doctrine\Descriptors\StringType;
 use PHPStan\Type\Doctrine\ObjectMetadataResolver;
 use function array_unshift;
+use function class_exists;
 use function strpos;
 use const PHP_VERSION_ID;
 
@@ -75,6 +77,7 @@ protected function getRule(): Rule
 				new StringType(),
 				new SimpleArrayType(),
 				new UuidTypeDescriptor(FakeTestingUuidType::class),
+				new EnumType(),
 				new ReflectionDescriptor(CarbonImmutableType::class, $this->createReflectionProvider(), self::getContainer()),
 				new ReflectionDescriptor(CarbonType::class, $this->createReflectionProvider(), self::getContainer()),
 				new ReflectionDescriptor(CustomType::class, $this->createReflectionProvider(), self::getContainer()),
@@ -441,4 +444,21 @@ public function testBug306(?string $objectManagerLoader): void
 		]);
 	}
 
+	/**
+	 * @dataProvider dataObjectManagerLoader
+	 */
+	public function testBug677(?string $objectManagerLoader): void
+	{
+		if (PHP_VERSION_ID < 80100) {
+			self::markTestSkipped('Test requires PHP 8.1');
+		}
+		if (!class_exists(\Doctrine\DBAL\Types\EnumType::class)) {
+			self::markTestSkipped('Test requires EnumType.');
+		}
+
+		$this->allowNullablePropertyForRequiredField = false;
+		$this->objectManagerLoader = $objectManagerLoader;
+		$this->analyse([__DIR__ . '/data/bug-677.php'], []);
+	}
+
 }

tests/Rules/Doctrine/ORM/data/bug-677.php

@@ -0,0 +1,33 @@
+<?php // lint >= 8.1
+
+namespace PHPStan\Rules\Doctrine\ORM\Bug677;
+
+use Doctrine\ORM\Mapping as ORM;
+
+#[ORM\Entity]
+class MyBrokenEntity
+{
+	public const LOGIN_METHOD_BASIC_AUTH = 'BasicAuth';
+	public const LOGIN_METHOD_SSO = 'SSO';
+	public const LOGIN_METHOD_SAML = 'SAML';
+
+	public const LOGIN_METHODS = [
+		self::LOGIN_METHOD_BASIC_AUTH,
+		self::LOGIN_METHOD_SSO,
+		self::LOGIN_METHOD_SAML,
+	];
+
+	/**
+	 * @var int|null
+	 */
+	#[ORM\Id]
+	#[ORM\GeneratedValue]
+	#[ORM\Column(type: 'integer')]
+	private $id;
+
+	/**
+	 * @var self::LOGIN_METHOD_*
+	 */
+	#[ORM\Column(name: 'login_method', type: 'enum', options: ['default' => self::LOGIN_METHOD_BASIC_AUTH, 'values' => self::LOGIN_METHODS])]
+	private string $loginMethod = self::LOGIN_METHOD_BASIC_AUTH;
+}