add missing choices_as_values options

Author: xabbuh

form/create_custom_field_type.rst

@@ -35,7 +35,8 @@ for form fields, which is ``<BundleName>\Form\Type``. Make sure the field extend
                     'Standard Shipping' => 'standard',
                     'Expedited Shipping' => 'expedited',
                     'Priority Shipping' => 'priority',
-                )
+                ),
+                'choices_as_values' => true,
             ));
         }
 
@@ -395,6 +396,7 @@ method to ``ShippingType``, which receives the shipping configuration::
         {
             $resolver->setDefaults(array(
                 'choices' => array_flip($this->shippingOptions),
+                'choices_as_values' => true,
             ));
         }
 

form/dynamic_form_modification.rst

@@ -490,9 +490,10 @@ sport like this::
                     $positions = null === $sport ? array() : $sport->getAvailablePositions();
 
                     $form->add('position', 'entity', array(
-                        'class'       => 'AppBundle:Position',
+                        'class' => 'AppBundle:Position',
                         'placeholder' => '',
-                        'choices'     => $positions,
+                        'choices' => $positions,
+                        'choices_as_values' => true,
                     ));
                 }
             );
@@ -553,9 +554,10 @@ The type would now look like::
                 $positions = null === $sport ? array() : $sport->getAvailablePositions();
 
                 $form->add('position', 'entity', array(
-                    'class'       => 'AppBundle:Position',
+                    'class' => 'AppBundle:Position',
                     'placeholder' => '',
-                    'choices'     => $positions,
+                    'choices' => $positions,
+                    'choices_as_values' => true,
                 ));
             };