validate we have the right type of object manager in the fixtures

book/routing.rst

@@ -461,6 +461,11 @@ follows::
          */
         public function load(ObjectManager $dm)
         {
+            if (!$dm instanceof DocumentManager) {
+                $class = get_class($dm);
+                throw new \RuntimeException("Fixture requires a PHPCR ODM DocumentManager instance, instance of '$class' given.");
+            }
+
             $route = new Route();
             $route->setParentDocument($dm->find(null, '/cms/routes'));
             $route->setName('projects');

book/simplecms.rst

@@ -61,6 +61,11 @@ To create a page, use the
          */
         public function load(ObjectManager $dm)
         {
+            if (!$dm instanceof DocumentManager) {
+                $class = get_class($dm);
+                throw new \RuntimeException("Fixture requires a PHPCR ODM DocumentManager instance, instance of '$class' given.");
+            }
+
             $parent = $dm->find(null, '/cms/simple');
             $page = new Page();
             $page->setTitle('About Symfony CMF');
@@ -111,6 +116,11 @@ structure, you would do::
          */
         public function load(ObjectManager $dm)
         {
+            if (!$dm instanceof DocumentManager) {
+                $class = get_class($dm);
+                throw new \RuntimeException("Fixture requires a PHPCR ODM DocumentManager instance, instance of '$class' given.");
+            }
+
             $root = $dm->find(null, '/cms/simple');
 
             $about = new Page();

bundles/phpcr_odm/fixtures_initializers.rst

@@ -298,6 +298,11 @@ A simple example fixture class looks like this::
     {
         public function load(ObjectManager $manager)
         {
+            if (!$manager instanceof DocumentManager) {
+                $class = get_class($manager);
+                throw new \RuntimeException("Fixture requires a PHPCR ODM DocumentManager instance, instance of '$class' given.");
+            }
+
             // ... create and persist your data here
         }
     }

bundles/seo/seo_aware.rst

@@ -156,6 +156,11 @@ And after that, you can use the
     {
         public function load(ObjectManager $manager)
         {
+            if (!$dm instanceof DocumentManager) {
+                $class = get_class($dm);
+                throw new \RuntimeException("Fixture requires a PHPCR ODM DocumentManager instance, instance of '$class' given.");
+            }
+
             $page = new Page();
             // ... set some page properties
 

quick_tour/the_model.rst

@@ -116,6 +116,11 @@ PHPCR. But first, you have to create a new Page document::
     // ...
     public function load(ObjectManager $documentManager)
     {
+        if (!$documentManager instanceof DocumentManager) {
+            $class = get_class($documentManager);
+            throw new \RuntimeException("Fixture requires a PHPCR ODM DocumentManager instance, instance of '$class' given.");
+        }
+
         $page = new Page(); // create a new Page object (document)
         $page->setName('new_page'); // the name of the node
         $page->setLabel('Another new Page');
@@ -130,6 +135,11 @@ it as its parent::
     // ...
     public function load(ObjectManager $documentManager)
     {
+        if (!$documentManager instanceof DocumentManager) {
+            $class = get_class($documentManager);
+            throw new \RuntimeException("Fixture requires a PHPCR ODM DocumentManager instance, instance of '$class' given.");
+        }
+
         // ...
 
         // get root document (/cms/simple)
@@ -144,6 +154,11 @@ document using the Doctrine API::
     // ...
     public function load(ObjectManager $documentManager)
     {
+        if (!$documentManager instanceof DocumentManager) {
+            $class = get_class($documentManager);
+            throw new \RuntimeException("Fixture requires a PHPCR ODM DocumentManager instance, instance of '$class' given.");
+        }
+
         // ...
         $documentManager->persist($page); // add the Page in the queue
         $documentManager->flush(); // add the Page to PHPCR

quick_tour/the_router.rst

@@ -158,6 +158,11 @@ Now you can add a new ``Route`` to the tree using Doctrine::
     {
         public function load(ObjectManager $documentManager)
         {
+            if (!$documentManager instanceof DocumentManager) {
+                $class = get_class($documentManager);
+                throw new \RuntimeException("Fixture requires a PHPCR ODM DocumentManager instance, instance of '$class' given.");
+            }
+
             $routesRoot = $documentManager->find(null, '/cms/routes');
 
             $route = new Route();

tutorial/getting-started.rst

@@ -372,6 +372,11 @@ Create a page for your CMS::
     {
         public function load(ObjectManager $dm)
         {
+            if (!$dm instanceof DocumentManager) {
+                $class = get_class($dm);
+                throw new \RuntimeException("Fixture requires a PHPCR ODM DocumentManager instance, instance of '$class' given.");
+            }
+
             $parent = $dm->find(null, '/cms/pages');
 
             $page = new Page();

tutorial/the-frontend.rst

@@ -119,6 +119,11 @@ to which you will add the existing ``Home`` page and an additional ``About`` pag
     {
         public function load(ObjectManager $dm)
         {
+            if (!$dm instanceof DocumentManager) {
+                $class = get_class($dm);
+                throw new \RuntimeException("Fixture requires a PHPCR ODM DocumentManager instance, instance of '$class' given.");
+            }
+
             $parent = $dm->find(null, '/cms/pages');
 
             $rootPage = new Page();