fix query

Author: cvxluo

src/sentry/event_manager.py

@@ -14,7 +14,7 @@
 from django.core.cache import cache
 from django.core.exceptions import ValidationError
 from django.db import IntegrityError, OperationalError, connection, router, transaction
-from django.db.models import Max
+from django.db.models import Max, Q
 from django.db.models.signals import post_save
 from django.utils.encoding import force_str
 from urllib3.exceptions import MaxRetryError, TimeoutError
@@ -721,7 +721,7 @@ def _set_project_platform_if_needed(project: Project, event: Event) -> None:
                 cache.set(cache_key, "1", 60 * 5)
 
             if not project.platform:
-                updated = Project.objects.filter(id=project.id, platform__in=[None, ""]).update(
+                updated = Project.objects.filter(Q(platform__isnull=True) | Q(platform="")).update(
                     platform=event.platform
                 )