From 186c076f2e0cb14ba166a13c2caf58ad995cb5d8 Mon Sep 17 00:00:00 2001
From: Leo Feyer <github@contao.org>
Date: Mon, 16 Sep 2013 13:24:13 +0200
Subject: [PATCH] Unset the primary key if a model is deleted (see #6162)

---
 system/docs/CHANGELOG.md                     | 3 +++
 system/modules/core/library/Contao/Model.php | 9 ++++++---
 2 files changed, 9 insertions(+), 3 deletions(-)

diff --git a/system/docs/CHANGELOG.md b/system/docs/CHANGELOG.md
index 57cac6104a..cd1f1cc028 100644
--- a/system/docs/CHANGELOG.md
+++ b/system/docs/CHANGELOG.md
@@ -4,6 +4,9 @@ Contao Open Source CMS Changelog
 Version 3.1.3 (2013-XX-XX)
 --------------------------
 
+### Fixed
+Unset the primary key if a model is deleted (see #6162).
+
 ### Fixed
 Support `tel:` and `sms:` upon IDNA conversion (see #6148).
 
diff --git a/system/modules/core/library/Contao/Model.php b/system/modules/core/library/Contao/Model.php
index 8b226da514..f342d9f5f4 100644
--- a/system/modules/core/library/Contao/Model.php
+++ b/system/modules/core/library/Contao/Model.php
@@ -334,9 +334,12 @@ protected function postSave($intType)
 	 */
 	public function delete()
 	{
-		return \Database::getInstance()->prepare("DELETE FROM " . static::$strTable . " WHERE " . static::$strPk . "=?")
-									   ->execute($this->{static::$strPk})
-									   ->affectedRows;
+		$intAffected = \Database::getInstance()->prepare("DELETE FROM " . static::$strTable . " WHERE " . static::$strPk . "=?")
+											   ->execute($this->{static::$strPk})
+											   ->affectedRows;
+
+		$this->arrData[static::$strPk] = null; // see #6162
+		return $intAffected;
 	}