Allow null to be stored as enum value

Author: Pavel.Batanov

src/DBAL/EnumType.php

@@ -48,6 +48,10 @@ private function getStrategy(): NamingStrategyInterface
      */
     public function convertToPHPValue($value, AbstractPlatform $platform)
     {
+        if (null === $value) {
+            return null;
+        }
+
         /** @var Enum $fqcn */
         $fqcn = $this->fqcn;
 
@@ -63,6 +67,10 @@ public function convertToPHPValue($value, AbstractPlatform $platform)
      */
     public function convertToDatabaseValue($value, AbstractPlatform $platform)
     {
+        if (null === $value) {
+            return null;
+        }
+
         if (!is_a($value, $this->fqcn)) {
             throw ConversionException::conversionFailed($value, $this->getName());
         }

tests/Unit/DBAL/EnumTypeTest.php

@@ -25,7 +25,7 @@ final class EnumTypeTest extends TestCase
      * @param string $value
      * @param TestEnum $expectedStatus
      */
-    public function testConvertToPHPValue(string $value, TestEnum $expectedStatus): void
+    public function testConvertToPHPValue(?string $value, ?TestEnum $expectedStatus): void
     {
         $actualValue = self::createType()->convertToPHPValue($value, $this->createPlatformMock());
 
@@ -38,7 +38,7 @@ public function testConvertToPHPValue(string $value, TestEnum $expectedStatus):
      * @param string $expectedStatus
      * @param TestEnum $status
      */
-    public function testConvertToDatabaseValue(string $expectedStatus, TestEnum $status): void
+    public function testConvertToDatabaseValue(?string $expectedStatus, ?TestEnum $status): void
     {
         $actualValue = self::createType()->convertToDatabaseValue($status, $this->createPlatformMock());
 
@@ -50,6 +50,7 @@ public function getObjectToValueMap(): array
         return [
             ['ONE', TestEnum::ONE()],
             ['TWO', TestEnum::TWO()],
+            [null, null],
         ];
     }