Fixed #DDC-571

lib/Doctrine/DBAL/Types/IntegerType.php

@@ -25,7 +25,7 @@ use Doctrine\DBAL\Platforms\AbstractPlatform;
 
 /**
  * Type that maps an SQL INT to a PHP integer.
- * 
+ *
  * @author Roman Borschel <roman@code-factory.org>
  * @since 2.0
  */
@@ -43,9 +43,9 @@ class IntegerType extends Type
 
     public function convertToPHPValue($value, AbstractPlatform $platform)
     {
-        return (int) $value;
+        return (null === $value) ? null : (int) $value;
     }
-    
+
     public function getBindingType()
     {
         return \PDO::PARAM_INT;

tests/Doctrine/Tests/DBAL/Types/IntegerTest.php

@@ -6,7 +6,7 @@ use Doctrine\DBAL\Types\Type;
 use Doctrine\Tests\DBAL\Mocks;
 
 require_once __DIR__ . '/../../TestInit.php';
- 
+
 class IntegerTest extends \Doctrine\Tests\DbalTestCase
 {
     protected
@@ -19,10 +19,14 @@ class IntegerTest extends \Doctrine\Tests\DbalTestCase
         $this->_type = Type::getType('integer');
     }
 
-    public function testDecimalConvertsToPHPValue()
+    public function testIntegerConvertsToPHPValue()
     {
         $this->assertTrue(
             is_integer($this->_type->convertToPHPValue('1', $this->_platform))
         );
+
+        $this->assertTrue(
+            is_null($this->_type->convertToPHPValue(null, $this->_platform))
+        );
     }
 }
\ No newline at end of file