Refs #24121 -- Added __repr__() to MiddlewareMixin and subclasses.

django/utils/deprecation.py

@@ -96,6 +96,16 @@ class MiddlewareMixin:
         self._async_check()
         super().__init__()
 
+    def __repr__(self):
+        return '<%s get_response=%s>' % (
+            self.__class__.__qualname__,
+            getattr(
+                self.get_response,
+                '__qualname__',
+                self.get_response.__class__.__name__,
+            ),
+        )
+
     def _async_check(self):
         """
         If get_response is a coroutine function, turns us into async mode so

tests/deprecation/test_middleware_mixin.py

@@ -54,6 +54,33 @@ class MiddlewareMixinTests(SimpleTestCase):
         XViewMiddleware,
     ]
 
+    def test_repr(self):
+        class GetResponse:
+            def __call__(self):
+                return HttpResponse()
+
+        def get_response():
+            return HttpResponse()
+
+        self.assertEqual(
+            repr(MiddlewareMixin(GetResponse())),
+            '<MiddlewareMixin get_response=GetResponse>',
+        )
+        self.assertEqual(
+            repr(MiddlewareMixin(get_response)),
+            '<MiddlewareMixin get_response='
+            'MiddlewareMixinTests.test_repr.<locals>.get_response>',
+        )
+        self.assertEqual(
+            repr(CsrfViewMiddleware(GetResponse())),
+            '<CsrfViewMiddleware get_response=GetResponse>',
+        )
+        self.assertEqual(
+            repr(CsrfViewMiddleware(get_response)),
+            '<CsrfViewMiddleware get_response='
+            'MiddlewareMixinTests.test_repr.<locals>.get_response>',
+        )
+
     def test_passing_explicit_none(self):
         msg = 'get_response must be provided.'
         for middleware in self.middlewares: