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, 8 insertions, 7 deletions

diff --git a/django/contrib/postgres/constraints.py b/django/contrib/postgres/constraints.py
index 2fcb076ecf..67e415ddcf 100644
--- a/django/contrib/postgres/constraints.py
+++ b/django/contrib/postgres/constraints.py
@@ -89,13 +89,14 @@ class ExclusionConstraint(BaseConstraint):
         return path, args, kwargs
 
     def __eq__(self, other):
-        return (
-            isinstance(other, self.__class__) and
-            self.name == other.name and
-            self.index_type == other.index_type and
-            self.expressions == other.expressions and
-            self.condition == other.condition
-        )
+        if isinstance(other, self.__class__):
+            return (
+                self.name == other.name and
+                self.index_type == other.index_type and
+                self.expressions == other.expressions and
+                self.condition == other.condition
+            )
+        return super().__eq__(other)
 
     def __repr__(self):
         return '<%s: index_type=%s, expressions=%s%s>' % (