adding location hidden field in Calendar formType

src/Bundle/ChillCalendarBundle/Form/CalendarType.php

@@ -2,6 +2,7 @@
 
 namespace Chill\CalendarBundle\Form;
 
+use Chill\MainBundle\Entity\Location;
 use Symfony\Component\Form\AbstractType;
 use Symfony\Component\Form\FormBuilderInterface;
 use Symfony\Component\OptionsResolver\OptionsResolver;
@@ -178,6 +179,20 @@ class CalendarType extends AbstractType
             ))
         ;
 
+        $builder->add('location', HiddenType::class)
+            ->get('location')
+            ->addModelTransformer(new CallbackTransformer(
+                function (?Location $location): string {
+                    if (null === $location) {
+                        return '';
+                    }
+                    return $location->getId();
+                },
+                function (?string $id): Location {
+                    return $this->om->getRepository(Location::class)->findOneBy(['id' => (int) $id]);
+                }
+            ))
+        ;
 
     //     $builder->add('invites', HiddenType::class);
     //     $builder->get('invites')

src/Bundle/ChillCalendarBundle/Resources/views/Calendar/edit.html.twig

@@ -38,7 +38,10 @@
     {{ form_row(form.calendarRange) }}
 {% endif %}
 
-.. location
+{%- if form.location is defined -%}
+    {{ form_row(form.location) }}
+    <div id="location"></div>
+{% endif %}
 
 {%- if form.comment is defined -%}
     {{ form_row(form.comment) }}

src/Bundle/ChillCalendarBundle/Resources/views/Calendar/new.html.twig

@@ -34,7 +34,10 @@
     {{ form_row(form.endDate) }}
 {% endif %}
 
-.. location
+{%- if form.location is defined -%}
+    {{ form_row(form.location) }}
+    <div id="location"></div>
+{% endif %}
 
 {%- if form.comment is defined -%}
     {{ form_row(form.comment) }}