ISTWCMS_5234: ensuring that media is not saved when none is selected

uw_cfg_common.module

@@ -136,6 +136,19 @@ function uw_cfg_common_entity_presave(EntityInterface $entity) {
         }
       }
     }
+
+    // If there is a type of media, ensure that we do only have
+    // values in the fields that are selected.
+    if ($entity->hasField('field_uw_type_of_media')) {
+
+      // Get the type of media.
+      $type_of_media = $entity->field_uw_type_of_media->value;
+
+      // If it is null then set the hero image to null.
+      if ($type_of_media == NULL) {
+        $entity->set('field_uw_hero_image', NULL);
+      }
+    }
   }
 }