From 14ff5ad7a8297b5975e079a230f519d75d7bcc4d Mon Sep 17 00:00:00 2001
From: Thibaut Decombe <68703331+UnknownPlatypus@users.noreply.github.com>
Date: Wed, 19 Oct 2022 10:14:51 +0200
Subject: [PATCH] Fix `RelatedManager` not callable (#1191)

* Add failing test

* Add call annotation
---
 django-stubs/db/models/manager.pyi      |  1 +
 tests/typecheck/fields/test_related.yml | 20 ++++++++++++++++++++
 2 files changed, 21 insertions(+)

diff --git a/django-stubs/db/models/manager.pyi b/django-stubs/db/models/manager.pyi
index 2ded943..8f0291c 100644
--- a/django-stubs/db/models/manager.pyi
+++ b/django-stubs/db/models/manager.pyi
@@ -172,6 +172,7 @@ class RelatedManager(Manager[_T]):
         self, objs: Union[QuerySet[_T], Iterable[Union[_T, int]]], *, bulk: bool = ..., clear: bool = ...
     ) -> None: ...
     def clear(self) -> None: ...
+    def __call__(self, *, manager: str) -> RelatedManager[_T]: ...
 
 class ManagerDescriptor:
     manager: BaseManager = ...
diff --git a/tests/typecheck/fields/test_related.yml b/tests/typecheck/fields/test_related.yml
index 60cc66e..df6c7ce 100644
--- a/tests/typecheck/fields/test_related.yml
+++ b/tests/typecheck/fields/test_related.yml
@@ -908,3 +908,23 @@
         from django.db import models
         T = TypeVar("T", bound=models.Model)
         ManyToManyFieldAlias = Union["models.ManyToManyField[Sequence[T], models.manager.RelatedManager[T]]"]
+
+-   case: callable_reverse_manager
+    main: |
+        from myapp.models import SalesMan
+        sales_man = SalesMan()
+        reveal_type(sales_man.client) # N: Revealed type is "django.db.models.manager.RelatedManager[myapp.models.CustomUser]"
+        reveal_type(sales_man.client(manager="staffs")) # N: Revealed type is "django.db.models.manager.RelatedManager[myapp.models.CustomUser]"
+    installed_apps:
+        - myapp
+    files:
+        -   path: myapp/__init__.py
+        -   path: myapp/models.py
+            content: |
+                from django.db import models
+
+                class CustomUser(models.Model):
+                    staffs = models.Manager()
+
+                class SalesMan(models.Model):
+                    client = models.ManyToManyField(CustomUser)