Fix: correctly handle empty user for old notes api format, fix frontend API version (#9846)

src/documents/serialisers.py

@@ -885,7 +885,7 @@ class NotesSerializer(serializers.ModelSerializer):
             request.version if request else settings.REST_FRAMEWORK["DEFAULT_VERSION"],
         )
 
-        if api_version < 8:
+        if api_version < 8 and "user" in ret:
             user_id = ret["user"]["id"]
             ret["user"] = user_id
 

src/paperless/settings.py

@@ -342,7 +342,7 @@ REST_FRAMEWORK = {
         "rest_framework.authentication.SessionAuthentication",
     ],
     "DEFAULT_VERSIONING_CLASS": "rest_framework.versioning.AcceptHeaderVersioning",
-    "DEFAULT_VERSION": "8",
+    "DEFAULT_VERSION": "8",  # match src-ui/src/environments/environment.prod.ts
     # Make sure these are ordered and that the most recent version appears
     # last. See api.md#api-versioning when adding new versions.
     "ALLOWED_VERSIONS": ["1", "2", "3", "4", "5", "6", "7", "8"],