[2.0.x] Fixed #28898 -- Corrected admin check to allow a OneToOneField in ModelAdmin.autocomplete_fields.

Backport of 30a389bd7795016d7f48bcda997e5dea5116f9bb from master

1 files changed, 14 insertions, 1 deletions

diff --git a/tests/modeladmin/test_checks.py b/tests/modeladmin/test_checks.py
index eaca153bd8..5559a8fe3c 100644
--- a/tests/modeladmin/test_checks.py
+++ b/tests/modeladmin/test_checks.py
@@ -6,7 +6,9 @@ from django.core.checks import Error
 from django.forms.models import BaseModelFormSet
 from django.test import SimpleTestCase
 
-from .models import Band, Song, ValidationTestInlineModel, ValidationTestModel
+from .models import (
+    Band, Song, User, ValidationTestInlineModel, ValidationTestModel,
+)
 
 
 class CheckTestCase(SimpleTestCase):
@@ -1243,3 +1245,14 @@ class AutocompleteFieldsTests(CheckTestCase):
         site = AdminSite()
         site.register(Band, SearchFieldsAdmin)
         self.assertIsValid(AutocompleteAdmin, Song, admin_site=site)
+
+    def test_autocomplete_is_onetoone(self):
+        class UserAdmin(ModelAdmin):
+            search_fields = ('name', )
+
+        class Admin(ModelAdmin):
+            autocomplete_fields = ('best_friend', )
+
+        site = AdminSite()
+        site.register(User, UserAdmin)
+        self.assertIsValid(Admin, ValidationTestModel, admin_site=site)