Merge branch 'fix-posthog-user-cannot-be-none' into 'develop'

Fix distinct_id cannot be None in posthog

Closes #2954

See merge request baserow/baserow!2649

backend/src/baserow/core/posthog.py

@@ -1,5 +1,6 @@
 from copy import deepcopy
 from typing import Optional
+from uuid import uuid4
 
 from django.conf import settings
 from django.contrib.auth.models import AbstractUser
@@ -60,7 +61,15 @@ def capture_user_event(
     :param workspace: Optionally the workspace related to the event.
     """
 
-    properties["user_email"] = getattr(user, "email", None)
+    if user.is_anonymous:
+        # The user_id cannot be None. It's needed by Posthog to identify the user
+        user_id = str(uuid4())
+        user_email = None
+    else:
+        user_id = user.id
+        user_email = user.email
+
+    properties["user_email"] = user_email
 
     if session is not None:
         properties["user_session"] = session
@@ -68,7 +77,7 @@ def capture_user_event(
     if workspace is not None:
         properties["workspace_id"] = workspace.id
 
-    capture_event(user.id, event, properties)
+    capture_event(user_id, event, properties)
 
 
 @receiver(action_done)

changelog/entries/unreleased/bug/2954_fix_posthog_user_cannot_be_none.json

@@ -0,0 +1,7 @@
+{
+    "type": "bug",
+    "message": "Fix posthog error when user is an AnonymousUser and distinc_id is None.",
+    "issue_number": 2954,
+    "bullet_points": [],
+    "created_at": "2024-09-02"
+}