Fixed #30651 -- Made __eq__() methods return NotImplemented for not implemented comparisons.

Changed __eq__ to return NotImplemented instead of False if compared to
an object of the same type, as is recommended by the Python data model
reference. Now these models can be compared to ANY (or other objects
with __eq__ overwritten) without returning False automatically.

1 files changed, 7 insertions, 0 deletions

diff --git a/tests/constraints/tests.py b/tests/constraints/tests.py
index 3b28c99e7f..8e2eb11e2a 100644
--- a/tests/constraints/tests.py
+++ b/tests/constraints/tests.py
@@ -1,3 +1,5 @@
+from unittest import mock
+
 from django.core.exceptions import ValidationError
 from django.db import IntegrityError, connection, models
 from django.db.models.constraints import BaseConstraint
@@ -39,6 +41,7 @@ class CheckConstraintTests(TestCase):
             models.CheckConstraint(check=check1, name='price'),
             models.CheckConstraint(check=check1, name='price'),
         )
+        self.assertEqual(models.CheckConstraint(check=check1, name='price'), mock.ANY)
         self.assertNotEqual(
             models.CheckConstraint(check=check1, name='price'),
             models.CheckConstraint(check=check1, name='price2'),
@@ -102,6 +105,10 @@ class UniqueConstraintTests(TestCase):
             models.UniqueConstraint(fields=['foo', 'bar'], name='unique'),
             models.UniqueConstraint(fields=['foo', 'bar'], name='unique'),
         )
+        self.assertEqual(
+            models.UniqueConstraint(fields=['foo', 'bar'], name='unique'),
+            mock.ANY,
+        )
         self.assertNotEqual(
             models.UniqueConstraint(fields=['foo', 'bar'], name='unique'),
             models.UniqueConstraint(fields=['foo', 'bar'], name='unique2'),