From 64424d1a900786facd2e31fa0eac00ec0db71df0 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Nicolas=20=C3=89vrard?= <nicoe@b2ck.com>
Date: Sat, 13 Dec 2025 14:57:52 +0100
Subject: [PATCH] Use the target id to compute the filter clause of a O2M field
 compared to None

Closes #14373
---
 trytond/trytond/model/fields/one2many.py     |  2 +-
 trytond/trytond/tests/test_field_one2many.py | 15 +++++++++++++++
 2 files changed, 16 insertions(+), 1 deletion(-)

diff --git a/trytond/trytond/model/fields/one2many.py b/trytond/trytond/model/fields/one2many.py
index 1c279da6ac..705af2eb65 100644
--- a/trytond/trytond/model/fields/one2many.py
+++ b/trytond/trytond/model/fields/one2many.py
@@ -358,7 +358,7 @@ class One2Many(Field):
                     if self.filter:
                         query = Target.search(
                             self.filter, order=[], query=True)
-                        where &= origin.in_(query)
+                        where &= target.id.in_(query)
                     query = target.select(origin, where=where)
                     expression = ~table.id.in_(query)
                 else:
diff --git a/trytond/trytond/tests/test_field_one2many.py b/trytond/trytond/tests/test_field_one2many.py
index 59804b3873..b36f8f5e7f 100644
--- a/trytond/trytond/tests/test_field_one2many.py
+++ b/trytond/trytond/tests/test_field_one2many.py
@@ -611,6 +611,21 @@ class FieldOne2ManyTestCase(
         self.assertEqual(len(filtered.targets), 4)
         self.assertEqual(filtered_target.value, 3)
 
+    @with_transaction()
+    def test_search_equals_filter(self):
+        "Test search one2many equals with filter"
+        One2Many = Pool().get('test.one2many_filter')
+        one2many, = One2Many.create([{
+                    'targets': [('create', [{'value': 3}])],
+                    }])
+
+        one2manys = One2Many.search([('targets', '=', None)])
+        one2manys_filtered = One2Many.search(
+            [('filtered_targets', '=', None)])
+
+        self.assertListEqual(one2manys, [])
+        self.assertListEqual(one2manys_filtered, [])
+
     @with_transaction()
     def test_search_non_equals_filter(self):
         "Test search one2many non equals with filter"