Updated documentation to reflect best practice of using Dependency Injection over Container. Includes changes from PR #8985

Author: Tom Maaswinkel

best_practices/security.rst

@@ -238,12 +238,20 @@ more advanced use-case, you can always do the same security check in PHP:
         // equivalent code without using the "denyAccessUnlessGranted()" shortcut:
         //
         // use Symfony\Component\Security\Core\Exception\AccessDeniedException;
+        // use Symfony\Component\Security\Core\Authorization\AuthorizationCheckerInterface
+        //
+        // ...
+        //
+        // public function __construct(AuthorizationCheckerInterface $authorizationChecker) {
+        //      $this->authorizationChecker = $authorizationChecker;
+        // }
+        //
         // ...
         //
-        // if (!$this->get('security.authorization_checker')->isGranted('edit', $post)) {
+        // if (!$this->authorizationChecker->isGranted('edit', $post)) {
         //    throw $this->createAccessDeniedException();
         // }
-
+        //
         // ...
     }
 
@@ -357,14 +365,22 @@ via the even easier shortcut in a controller:
 
         $this->denyAccessUnlessGranted('edit', $post);
 
-        // or without the shortcut:
-        //
         // use Symfony\Component\Security\Core\Exception\AccessDeniedException;
+        // use Symfony\Component\Security\Core\Authorization\AuthorizationCheckerInterface
+        //
         // ...
         //
-        // if (!$this->get('security.authorization_checker')->isGranted('edit', $post)) {
+        // public function __construct(AuthorizationCheckerInterface $authorizationChecker) {
+        //      $this->authorizationChecker = $authorizationChecker;
+        // }
+        //
+        // ...
+        //
+        // if (!$this->authorizationChecker->isGranted('edit', $post)) {
         //    throw $this->createAccessDeniedException();
         // }
+        //
+        // ...
     }
 
 Learn More

doctrine/multiple_entity_managers.rst

@@ -231,11 +231,22 @@ the default entity manager (i.e. ``default``) is returned::
 
     // ...
 
+    use Doctrine\ORM\EntityManagerInterface;
+
     class UserController extends Controller
     {
+        protected $em;
+
+        public function __construct(EntityManagerInterface $em)
+        {
+            $this->em = $em;
+        }
+
         public function indexAction()
         {
-            // All 3 return the "default" entity manager
+            // All 4 return the "default" entity manager, though using
+            // dependency injection is a best practice
+            $em = $this->em;
             $em = $this->getDoctrine()->getManager();
             $em = $this->getDoctrine()->getManager('default');
             $em = $this->get('doctrine.orm.default_entity_manager');

routing.rst

@@ -576,7 +576,7 @@ Generating URLs with Query Strings
 The ``generate()`` method takes an array of wildcard values to generate the URI.
 But if you pass extra ones, they will be added to the URI as a query string::
 
-    $this->get('router')->generate('blog', array(
+    $this->router->generate('blog', array(
         'page' => 2,
         'category' => 'Symfony'
     ));