Merge branch '2.8' into 3.4

* 2.8:
  Server version should be specified as a string
  Event form modifications improvements
  Add createdAt property + setter and getter

Author: javiereguiluz

components/serializer.rst

@@ -70,6 +70,7 @@ exists in your project::
         private $age;
         private $name;
         private $sportsman;
+        private $createdAt;
 
         // Getters
         public function getName()
@@ -82,6 +83,11 @@ exists in your project::
             return $this->age;
         }
 
+        public function getCreatedAt()
+        {
+            return $this->createdAt;
+        }
+
         // Issers
         public function isSportsman()
         {
@@ -103,6 +109,11 @@ exists in your project::
         {
             $this->sportsman = $sportsman;
         }
+
+        public function setCreatedAt($createdAt)
+        {
+            $this->createdAt = $createdAt;
+        }
     }
 
 Now, if you want to serialize this object into JSON, you only need to

form/dynamic_form_modification.rst

@@ -502,6 +502,11 @@ callbacks only because in two different scenarios, the data that you can use is
 available in different events. Other than that, the listeners always perform
 exactly the same things on a given form.
 
+.. tip::
+
+    The ``FormEvents::POST_SUBMIT`` event does not allow to modify the form
+    the listener is bound to, but it allows to modify its parent.
+
 One piece that is still missing is the client-side updating of your form after
 the sport is selected. This should be handled by making an AJAX call back to
 your application. Assume that you have a sport meetup creation controller::

form/events.rst

@@ -219,7 +219,8 @@ View data        Normalized data transformed using a view transformer
 
 .. caution::
 
-    At this point, you cannot add or remove fields to the form.
+    At this point, you cannot add or remove fields to the current form and its
+    children.
 
 .. sidebar:: ``FormEvents::POST_SUBMIT`` in the Form component
 

reference/configuration/doctrine.rst

@@ -321,7 +321,7 @@ The following block shows all possible configuration keys:
                 charset:              UTF8
                 logging:              '%kernel.debug%'
                 platform_service:     MyOwnDatabasePlatformService
-                server_version:       5.6
+                server_version:       '5.6'
                 mapping_types:
                     enum: string
                 types:
@@ -371,6 +371,11 @@ The following block shows all possible configuration keys:
     your database server version (use ``postgres -V`` or ``psql -V`` command
     to find your PostgreSQL version and ``mysql -V`` to get your MySQL
     version).
+    
+    Always wrap the server version number with quotes to parse it as a string
+    instead of a float number. Otherwise, the floating-point representation
+    issues can make your version be considered a different number (e.g. ``5.6``
+    will be rounded as ``5.5999999999999996447286321199499070644378662109375``).
 
     If you don't define this option and you haven't created your database
     yet, you may get ``PDOException`` errors because Doctrine will try to