From e0c3519b948645cbb3456a4f1ef58a84b2a7bf7b Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Sebasti=C3=A1n=20Ram=C3=ADrez?= <tiangolo@gmail.com>
Date: Wed, 12 Feb 2020 21:36:14 +0100
Subject: [PATCH] :sparkles: Allow callables (as functools.partial) in path
 operations (#977)

---
 fastapi/routing.py              |  4 +---
 tests/test_callable_endpoint.py | 24 ++++++++++++++++++++++++
 2 files changed, 25 insertions(+), 3 deletions(-)
 create mode 100644 tests/test_callable_endpoint.py

diff --git a/fastapi/routing.py b/fastapi/routing.py
index 09c4bf366..bbc2b4133 100644
--- a/fastapi/routing.py
+++ b/fastapi/routing.py
@@ -335,9 +335,7 @@ class APIRoute(routing.Route):
         self.include_in_schema = include_in_schema
         self.response_class = response_class
 
-        assert inspect.isfunction(endpoint) or inspect.ismethod(
-            endpoint
-        ), f"An endpoint must be a function or method"
+        assert callable(endpoint), f"An endpoint must be a callable"
         self.dependant = get_dependant(path=self.path_format, call=self.endpoint)
         for depends in self.dependencies[::-1]:
             self.dependant.dependencies.insert(
diff --git a/tests/test_callable_endpoint.py b/tests/test_callable_endpoint.py
new file mode 100644
index 000000000..bcc60a023
--- /dev/null
+++ b/tests/test_callable_endpoint.py
@@ -0,0 +1,24 @@
+from functools import partial
+
+from fastapi import FastAPI
+from starlette.testclient import TestClient
+
+
+def main(some_arg, q: str = None):
+    return {"some_arg": some_arg, "q": q}
+
+
+endpoint = partial(main, "foo")
+
+app = FastAPI()
+
+app.get("/")(endpoint)
+
+
+client = TestClient(app)
+
+
+def test_partial():
+    response = client.get("/?q=bar")
+    data = response.json()
+    assert data == {"some_arg": "foo", "q": "bar"}