fix: validate string value in convertToDatabaseValue() method

Author: landure

src/MartinGeorgiev/Doctrine/DBAL/Types/Exceptions/InvalidLtreeForPHPException.php

@@ -17,4 +17,9 @@ public static function forInvalidType(mixed $value): self
     {
         return self::create('Value must be a LtreeInterface, %s given', \gettype($value));
     }
+
+    public static function forInvalidFormat(mixed $value): self
+    {
+        return self::create('Invalid Ltree format: %s', $value);
+    }
 }

src/MartinGeorgiev/Doctrine/DBAL/Types/Ltree.php

@@ -65,7 +65,15 @@ public function convertToDatabaseValue($value, AbstractPlatform $platform): ?str
     {
         $this->assertPostgreSQLPlatform($platform);
 
-        if ($value instanceof LtreeInterface || \is_string($value)) {
+        if (\is_string($value)) {
+            try {
+                $value = LtreeValueObject::fromString($value);
+            } catch (\InvalidArgumentException) {
+                throw InvalidLtreeForPHPException::forInvalidFormat($value);
+            }
+        }
+
+        if ($value instanceof LtreeInterface) {
             return (string) $value;
         }
 

tests/Unit/MartinGeorgiev/Doctrine/DBAL/Types/LtreeTest.php

@@ -111,6 +111,7 @@ public function throws_exception_for_invalid_database_value_inputs(mixed $phpVal
     public static function provideInvalidDatabaseValueInputs(): array
     {
         return [
+            'invalid string' => ['invalid..ltree'],
             'integer input' => [123],
             'array input' => [['not', 'ltree']],
             'boolean input' => [true],