outposts: fix permissions not being updated when providers are modified

passbook/outposts/models.py

@@ -104,25 +104,22 @@ class Outpost(models.Model):
             return datetime.fromtimestamp(value)
         return None
 
-    def _create_user(self) -> User:
+    @property
-        """Create user and assign permissions for all required objects"""
+    def user(self) -> User:
-        user: User = User.objects.create(username=f"pb-outpost-{self.uuid.hex}")
+        """Get/create user with access to all required objects"""
-        user.set_unusable_password()
+        users = User.objects.filter(username=f"pb-outpost-{self.uuid.hex}")
-        user.save()
+        if not users.exists():
+            user: User = User.objects.create(username=f"pb-outpost-{self.uuid.hex}")
+            user.set_unusable_password()
+            user.save()
+        else:
+            user = users.first()
         for model in self.get_required_objects():
             assign_perm(
                 f"{model._meta.app_label}.view_{model._meta.model_name}", user, model
             )
         return user
 
-    @property
-    def user(self) -> User:
-        """Get/create user with access to all required objects"""
-        user = User.objects.filter(username=f"pb-outpost-{self.uuid.hex}")
-        if user.exists():
-            return user.first()
-        return self._create_user()
-
     @property
     def token(self) -> Token:
         """Get/create token for auto-generated user"""

passbook/outposts/tasks.py

@@ -41,7 +41,7 @@ def outpost_send_update(model_class: str, model_pk: Any):
     """Send outpost update to all registered outposts, irregardless to which passbook
     instance they are connected"""
     model = path_to_class(model_class)
-    outpost_model: OutpostModel = model.objects.get(model_pk)
+    outpost_model: OutpostModel = model.objects.get(pk=model_pk)
     for outpost in outpost_model.outpost_set.all():
         channel_layer = get_channel_layer()
         for channel in outpost.channels: