From 783090c2cd5311b779e6b61fa1d2a328323b57f5 Mon Sep 17 00:00:00 2001
From: shamoon <4887959+shamoon@users.noreply.github.com>
Date: Mon, 15 Jan 2024 14:06:59 -0800
Subject: [PATCH] Fix shared by me filter with multiple users / groups in
 postgres (#5396)

---
 src/documents/filters.py | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/src/documents/filters.py b/src/documents/filters.py
index bab20a4dc..b760b9779 100644
--- a/src/documents/filters.py
+++ b/src/documents/filters.py
@@ -114,6 +114,8 @@ class SharedByUser(Filter):
         ctype = ContentType.objects.get_for_model(self.model)
         UserObjectPermission = get_user_obj_perms_model()
         GroupObjectPermission = get_group_obj_perms_model()
+        # see https://github.com/paperless-ngx/paperless-ngx/issues/5392, we limit subqueries
+        # to 1 because Postgres doesn't like returning > 1 row, but all we care about is > 0
         return (
             qs.filter(
                 owner_id=value,
@@ -123,7 +125,7 @@ class SharedByUser(Filter):
                     UserObjectPermission.objects.filter(
                         content_type=ctype,
                         object_pk=Cast(OuterRef("pk"), CharField()),
-                    ).values("user_id"),
+                    ).values("user_id")[:1],
                 ),
             )
             .annotate(
@@ -131,7 +133,7 @@ class SharedByUser(Filter):
                     GroupObjectPermission.objects.filter(
                         content_type=ctype,
                         object_pk=Cast(OuterRef("pk"), CharField()),
-                    ).values("group_id"),
+                    ).values("group_id")[:1],
                 ),
             )
             .filter(