From 09c871dac863c2c38db30ff509d220b1da4da5f9 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Sebasti=C3=A1n=20Ram=C3=ADrez?= <tiangolo@gmail.com>
Date: Thu, 4 Dec 2025 01:30:43 +0100
Subject: [PATCH] =?UTF-8?q?=F0=9F=90=9B=20Fix=20Dependant=20logic=20to=20a?=
 =?UTF-8?q?ccount=20for=20callable=20class=20instances=20wrapped?=
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---
 fastapi/dependencies/models.py | 33 +++++++++++++++++++++++++++++----
 1 file changed, 29 insertions(+), 4 deletions(-)

diff --git a/fastapi/dependencies/models.py b/fastapi/dependencies/models.py
index 1a65766ef..9b545e4e5 100644
--- a/fastapi/dependencies/models.py
+++ b/fastapi/dependencies/models.py
@@ -99,9 +99,18 @@ class Dependant:
         dunder_call = getattr(_impartial(self.call), "__call__", None)  # noqa: B004
         if dunder_call is None:
             return False  # pragma: no cover
-        return inspect.isgeneratorfunction(
+        if inspect.isgeneratorfunction(
             _impartial(dunder_call)
-        ) or inspect.isgeneratorfunction(_unwrapped_call(dunder_call))
+        ) or inspect.isgeneratorfunction(_unwrapped_call(dunder_call)):
+            return True
+        dunder_unwrapped_call = getattr(_unwrapped_call(self.call), "__call__", None)  # noqa: B004
+        if dunder_unwrapped_call is None:
+            return False  # pragma: no cover
+        if inspect.isgeneratorfunction(
+            _impartial(dunder_unwrapped_call)
+        ) or inspect.isgeneratorfunction(_unwrapped_call(dunder_unwrapped_call)):
+            return True
+        return False
 
     @cached_property
     def is_async_gen_callable(self) -> bool:
@@ -114,9 +123,18 @@ class Dependant:
         dunder_call = getattr(_impartial(self.call), "__call__", None)  # noqa: B004
         if dunder_call is None:
             return False  # pragma: no cover
-        return inspect.isasyncgenfunction(
+        if inspect.isasyncgenfunction(
             _impartial(dunder_call)
-        ) or inspect.isasyncgenfunction(_unwrapped_call(dunder_call))
+        ) or inspect.isasyncgenfunction(_unwrapped_call(dunder_call)):
+            return True
+        dunder_unwrapped_call = getattr(_unwrapped_call(self.call), "__call__", None)  # noqa: B004
+        if dunder_unwrapped_call is None:
+            return False  # pragma: no cover
+        if inspect.isasyncgenfunction(
+            _impartial(dunder_unwrapped_call)
+        ) or inspect.isasyncgenfunction(_unwrapped_call(dunder_unwrapped_call)):
+            return True
+        return False
 
     @cached_property
     def is_coroutine_callable(self) -> bool:
@@ -137,6 +155,13 @@ class Dependant:
             _unwrapped_call(dunder_call)
         ):
             return True
+        dunder_unwrapped_call = getattr(_unwrapped_call(self.call), "__call__", None)  # noqa: B004
+        if dunder_unwrapped_call is None:
+            return False  # pragma: no cover
+        if iscoroutinefunction(
+            _impartial(dunder_unwrapped_call)
+        ) or iscoroutinefunction(_unwrapped_call(dunder_unwrapped_call)):
+            return True
         # if inspect.isclass(self.call): False, covered by default return
         return False