From b6589ba9a94f2ba532813cc15be1df58c37d2c61 Mon Sep 17 00:00:00 2001
From: Loz Calver <lozcalver@bigfork.co.uk>
Date: Wed, 23 Oct 2013 14:54:07 +0100
Subject: [PATCH] NEW: Page types no longer require a controller, they can
 inherit the parent page type's

Use ClassInfo::ancestry() instead of get_parent_class()

Fall back to ContentController by default
---
 code/controllers/ModelAsController.php | 13 ++++++++++---
 1 file changed, 10 insertions(+), 3 deletions(-)

diff --git a/code/controllers/ModelAsController.php b/code/controllers/ModelAsController.php
index 2563f35d..b4495fbf 100644
--- a/code/controllers/ModelAsController.php
+++ b/code/controllers/ModelAsController.php
@@ -16,9 +16,16 @@ class ModelAsController extends Controller implements NestedController {
 	 * @param string $action
 	 * @return ContentController
 	 */
-	static public function controller_for(SiteTree $sitetree, $action = null) {
-		if($sitetree->class == 'SiteTree') $controller = "ContentController";
-		else $controller = "{$sitetree->class}_Controller";
+	public static function controller_for(SiteTree $sitetree, $action = null) {
+		if ($sitetree->class == 'SiteTree') {
+			$controller = "ContentController";
+		} else {
+			$ancestry = ClassInfo::ancestry($sitetree->class);
+			while ($class = array_pop($ancestry)) {
+				if (class_exists($class . "_Controller")) break;
+			}
+			$controller = ($class !== null) ? "{$class}_Controller" : "ContentController";
+		}
 
 		if($action && class_exists($controller . '_' . ucfirst($action))) {
 			$controller = $controller . '_' . ucfirst($action);