From b1ea695195374d2e0dfc3257e0739ebe3091d6eb Mon Sep 17 00:00:00 2001
From: Hasan Ramezani <hasan.r67@gmail.com>
Date: Tue, 10 Sep 2024 20:26:39 +0200
Subject: [PATCH] Fix TypeError introduced in 2.5

---
 pydantic_settings/sources.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/pydantic_settings/sources.py b/pydantic_settings/sources.py
index c793091..30e7fa3 100644
--- a/pydantic_settings/sources.py
+++ b/pydantic_settings/sources.py
@@ -2115,7 +2115,7 @@ def read_env_file(
 def _annotation_is_complex(annotation: type[Any] | None, metadata: list[Any]) -> bool:
     # If the model is a root model, the root annotation should be used to
     # evaluate the complexity.
-    if isinstance(annotation, type) and issubclass(annotation, RootModel):
+    if annotation is not None and inspect.isclass(annotation) and issubclass(annotation, RootModel):
         # In some rare cases (see test_root_model_as_field),
         # the root attribute is not available. For these cases, python 3.8 and 3.9
         # return 'RootModelRootType'.