confidential toggle rights

src/Bundle/ChillPersonBundle/Entity/AccompanyingPeriod.php

@@ -49,6 +49,10 @@ use UnexpectedValueException;
  *     "accompanying_period": AccompanyingPeriod::class
  * })
  * @Assert\GroupSequenceProvider
+ * @Assert\Expression(
+ *     "this.isConfidential and this.getUser === NULL",
+ *     message="If the accompanying course is confirmed and confidential, a referrer must remain assigned."
+ * )
  */
 class AccompanyingPeriod implements
     TrackCreationInterface,