From 85b0addca40a19f23cdeddc1d1ac6509aefae62a Mon Sep 17 00:00:00 2001
From: PrettyWood <em.jolibois@gmail.com>
Date: Tue, 9 Jun 2020 10:26:19 +0200
Subject: [PATCH] fix: type hints on BaseConfig

closes #1614
---
 changes/1614-PrettyWood.md | 1 +
 pydantic/main.py           | 4 ++++
 tests/test_main.py         | 9 ++++++++-
 3 files changed, 13 insertions(+), 1 deletion(-)
 create mode 100644 changes/1614-PrettyWood.md

diff --git a/changes/1614-PrettyWood.md b/changes/1614-PrettyWood.md
new file mode 100644
index 0000000000..046a20ec06
--- /dev/null
+++ b/changes/1614-PrettyWood.md
@@ -0,0 +1 @@
+Ensure `SchemaExtraCallable` is always defined to get type hints on BaseConfig.
\ No newline at end of file
diff --git a/pydantic/main.py b/pydantic/main.py
index bb01d2e3cc..e47f7af322 100644
--- a/pydantic/main.py
+++ b/pydantic/main.py
@@ -66,6 +66,10 @@ def __call__(self, schema: Dict[str, Any], model_class: Type['Model']) -> None:
             pass
 
 
+else:
+    SchemaExtraCallable = Callable[..., None]
+
+
 try:
     import cython  # type: ignore
 except ImportError:
diff --git a/tests/test_main.py b/tests/test_main.py
index 76e05b70ad..ed28a5ec4f 100644
--- a/tests/test_main.py
+++ b/tests/test_main.py
@@ -1,6 +1,6 @@
 import sys
 from enum import Enum
-from typing import Any, Callable, ClassVar, Dict, List, Mapping, Optional, Type
+from typing import Any, Callable, ClassVar, Dict, List, Mapping, Optional, Type, get_type_hints
 from uuid import UUID, uuid4
 
 import pytest
@@ -1119,3 +1119,10 @@ class Model2(BaseModel):
         Model1.parse_obj({})
     with pytest.raises(ValidationError):
         Model2.parse_obj({})
+
+
+def test_base_config_type_hinting():
+    class M(BaseModel):
+        a: int
+
+    get_type_hints(M.__config__)