Fix Django 1.9 issue preventing use of MIDDLEWARE_CLASSES (#870)

* Update CHANGELOG.md * Fix Django 1.9 issue preventing use of MIDDLEWARE_CLASSES Co-authored-by: Srikanth Chekuri <srikanth.chekuri92@gmail.com>
open-telemetry · Jan 21, 2022 · 91d65e0 · 91d65e0
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diff --git a/CHANGELOG.md b/CHANGELOG.md
@@ -26,6 +26,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - `opentelemetry-instrumentation-asgi` ASGI: Conditionally create SERVER spans
   ([#843](https://github.com/open-telemetry/opentelemetry-python-contrib/pull/843))
 
+- `opentelemetry-instrumentation-django` Django: fix issue preventing detection of MIDDLEWARE_CLASSES
 
 ## [1.8.0-0.27b0](https://github.com/open-telemetry/opentelemetry-python/releases/tag/v1.8.0-0.27b0) - 2021-12-17
 

diff --git a/...opentelemetry-instrumentation-django/src/opentelemetry/instrumentation/django/__init__.py b/...opentelemetry-instrumentation-django/src/opentelemetry/instrumentation/django/__init__.py
@@ -105,7 +105,7 @@ def _get_django_middleware_setting() -> str:
     # In Django versions 1.x, setting MIDDLEWARE_CLASSES can be used as a legacy
     # alternative to MIDDLEWARE. This is the case when `settings.MIDDLEWARE` has
     # its default value (`None`).
-    if not DJANGO_2_0 and getattr(settings, "MIDDLEWARE", []) is None:
+    if not DJANGO_2_0 and getattr(settings, "MIDDLEWARE", None) is None:
         return "MIDDLEWARE_CLASSES"
     return "MIDDLEWARE"