From 5fa4ccab7e42e86fa4a0681d21bd1326c9c5eac3 Mon Sep 17 00:00:00 2001
From: Sarah Boyce <42296566+sarahboyce@users.noreply.github.com>
Date: Mon, 4 Nov 2024 16:09:55 +0100
Subject: Refs #26001 -- Handled relationship exact lookups in
 ModelAdmin.search_fields.

---
 tests/admin_changelist/admin.py |  1 +
 tests/admin_changelist/tests.py | 22 ++++++++++++++++++++++
 2 files changed, 23 insertions(+)

(limited to 'tests')

diff --git a/tests/admin_changelist/admin.py b/tests/admin_changelist/admin.py
index d9dc498e84..937beea48f 100644
--- a/tests/admin_changelist/admin.py
+++ b/tests/admin_changelist/admin.py
@@ -56,6 +56,7 @@ class ChildAdmin(admin.ModelAdmin):
 
 class GrandChildAdmin(admin.ModelAdmin):
     list_display = ["name", "parent__name", "parent__parent__name"]
+    search_fields = ["parent__name__exact", "parent__age__exact"]
 
 
 site.register(GrandChild, GrandChildAdmin)
diff --git a/tests/admin_changelist/tests.py b/tests/admin_changelist/tests.py
index a823a72f7d..0be6a54ed4 100644
--- a/tests/admin_changelist/tests.py
+++ b/tests/admin_changelist/tests.py
@@ -879,6 +879,28 @@ class ChangeListTests(TestCase):
                     cl = model_admin.get_changelist_instance(request)
                 self.assertCountEqual(cl.queryset, expected_result)
 
+    def test_search_with_exact_lookup_relationship_field(self):
+        child = Child.objects.create(name="I am a child", age=11)
+        grandchild = GrandChild.objects.create(name="I am a grandchild", parent=child)
+        model_admin = GrandChildAdmin(GrandChild, custom_site)
+
+        request = self.factory.get("/", data={SEARCH_VAR: "'I am a child'"})
+        request.user = self.superuser
+        cl = model_admin.get_changelist_instance(request)
+        self.assertCountEqual(cl.queryset, [grandchild])
+        for search_term, expected_result in [
+            ("11", [grandchild]),
+            ("'I am a child'", [grandchild]),
+            ("1", []),
+            ("A", []),
+            ("random", []),
+        ]:
+            request = self.factory.get("/", data={SEARCH_VAR: search_term})
+            request.user = self.superuser
+            with self.subTest(search_term=search_term):
+                cl = model_admin.get_changelist_instance(request)
+                self.assertCountEqual(cl.queryset, expected_result)
+
     def test_no_distinct_for_m2m_in_list_filter_without_params(self):
         """
         If a ManyToManyField is in list_filter but isn't in any lookup params,
-- 
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