Fix: remove views from projects if catalog is changed

rdmo/projects/handlers.py

@@ -0,0 +1,25 @@
+from django.db.models.signals import post_save
+from django.dispatch import receiver
+
+from rdmo.projects.models import Project
+from rdmo.views.models import View
+
+
+@receiver(post_save, sender=Project)
+def update_views_on_catalog_change(sender, instance, **kwargs):
+    # remove views that are no longer available
+    view_candidates = instance.views.exclude(catalogs__in=[instance.catalog]) \
+                                    .exclude(catalogs=None)
+
+    for view in view_candidates:
+        instance.views.remove(view)
+
+    # add views that are now available
+    view_candidates = View.objects.exclude(id__in=[v.id for v in instance.views.all()]) \
+                                  .filter_current_site() \
+                                  .filter_catalog(instance.catalog)
+                                #   .filter_group(self.request.user) \
+                                #   .filter_availability(self.request.user).exists()
+
+    for view in view_candidates:
+        instance.views.add(view)