Fixed #36879 -- Identified Django client in Redis client metadata.

AUTHORS

@@ -113,6 +113,7 @@ answer newbie questions, and generally made Django that much better:
     Anubhav Joshi <anubhav9042@gmail.com>
     Anvesh Mishra <anveshgreat11@gmail.com>
     Anže Pečar <anze@pecar.me>
+    ar3ph <https://github.com/ar3ph>
     A. Rafey Khan <khanxbahria@gmail.com>
     Aram Dulyan
     arien <regexbot@gmail.com>

django/core/cache/backends/redis.py

@@ -4,6 +4,7 @@ import pickle
 import random
 import re
 
+import django
 from django.core.cache.backends.base import DEFAULT_TIMEOUT, BaseCache
 from django.utils.functional import cached_property
 from django.utils.module_loading import import_string
@@ -59,7 +60,19 @@ class RedisCacheClient:
             parser_class = import_string(parser_class)
         parser_class = parser_class or self._lib.connection.DefaultParser
 
-        self._pool_options = {"parser_class": parser_class, **options}
+        version = django.get_version()
+        if hasattr(self._lib, "DriverInfo"):
+            driver_info = self._lib.DriverInfo().add_upstream_driver("django", version)
+            driver_info_options = {"driver_info": driver_info}
+        else:
+            # DriverInfo is not available in this redis-py version.
+            driver_info_options = {"lib_name": f"redis-py(django_v{version})"}
+
+        self._pool_options = {
+            "parser_class": parser_class,
+            **driver_info_options,
+            **options,
+        }
 
     def _get_connection_pool_index(self, write):
         # Write to the first server. Read from other servers if there are more,

tests/cache/tests.py

@@ -15,6 +15,7 @@ from functools import wraps
 from pathlib import Path
 from unittest import mock, skipIf
 
+import django
 from django.conf import settings
 from django.core import management, signals
 from django.core.cache import (
@@ -1986,6 +1987,24 @@ class RedisCacheTests(BaseCacheTests, TestCase):
         self.assertEqual(pool.connection_kwargs["socket_timeout"], 0.1)
         self.assertIs(pool.connection_kwargs["retry_on_timeout"], True)
 
+    def test_client_driver_info(self):
+        client_info = cache._cache.get_client().client_info()
+        if {"lib-name", "lib-ver"}.issubset(client_info):
+            version = django.get_version()
+            if hasattr(self.lib, "DriverInfo"):
+                info = self._lib.DriverInfo().add_upstream_driver("django", version)
+                correct_lib_name = info.formatted_name
+            else:
+                correct_lib_name = f"redis-py(django_v{version})"
+            # Relax the assertion to allow date variance in editable installs.
+            truncated_lib_name = correct_lib_name.rsplit(".dev", maxsplit=1)[0]
+            self.assertIn(truncated_lib_name, client_info["lib-name"])
+            self.assertEqual(client_info["lib-ver"], self.lib.__version__)
+        else:
+            # Redis versions below 7.2 lack CLIENT SETINFO.
+            self.assertNotIn("lib-ver", client_info)
+            self.assertNotIn("lib-name", client_info)
+
 
 class FileBasedCachePathLibTests(FileBasedCacheTests):
     def mkdtemp(self):