From f64724aced54731a9868af0957ccd6c93ec2e316 Mon Sep 17 00:00:00 2001
From: Jose Lorenzo Rodriguez <jose.zap@gmail.com>
Date: Wed, 16 Sep 2015 09:48:58 +0200
Subject: [PATCH] Making UuidType marshal empty strings as null

---
 src/Database/Type/UuidType.php                | 14 ++++++++++++++
 tests/TestCase/Database/Type/UuidTypeTest.php | 10 ++++++++++
 2 files changed, 24 insertions(+)

diff --git a/src/Database/Type/UuidType.php b/src/Database/Type/UuidType.php
index eb62a423af3..767d80a3e0c 100644
--- a/src/Database/Type/UuidType.php
+++ b/src/Database/Type/UuidType.php
@@ -79,4 +79,18 @@ public function newId()
     {
         return Text::uuid();
     }
+
+    /**
+     * Marshalls request data into a PHP string
+     *
+     * @param mixed $value The value to convert.
+     * @return string|null Converted value.
+     */
+    public function marshal($value)
+    {
+        if ($value === null || $value === '') {
+            return null;
+        }
+        return (string)$value;
+    }
 }
diff --git a/tests/TestCase/Database/Type/UuidTypeTest.php b/tests/TestCase/Database/Type/UuidTypeTest.php
index 45b5b3c71fa..3c52146bb3f 100644
--- a/tests/TestCase/Database/Type/UuidTypeTest.php
+++ b/tests/TestCase/Database/Type/UuidTypeTest.php
@@ -91,4 +91,14 @@ public function testNewId()
         $this->assertRegExp('/^[a-f0-9-]+$/', $one, 'Should quack like a uuid');
         $this->assertRegExp('/^[a-f0-9-]+$/', $two, 'Should quack like a uuid');
     }
+
+    /**
+     * Tests that marshalling an empty string results in null
+     *
+     * @return void
+     */
+    public function testMarshalEmptyString()
+    {
+        $this->assertNull($this->type->marshal(''));
+    }
 }