check for async callable object and function for relay resolver

ariadne/contrib/relay/objects.py

@@ -16,7 +16,7 @@
 )
 from ariadne.contrib.relay.utils import decode_global_id
 from ariadne.types import Resolver
-from ariadne.utils import type_get_extension, type_set_extension
+from ariadne.utils import is_async_callable, type_get_extension, type_set_extension
 
 
 class RelayObjectType(ObjectType):
@@ -33,7 +33,7 @@ def __init__(
     def resolve_wrapper(self, resolver: ConnectionResolver):
         def wrapper(obj, info, *args, **kwargs):
             connection_arguments = self.connection_arguments_class(**kwargs)
-            if iscoroutinefunction(resolver):
+            if is_async_callable(resolver):
 
                 async def async_my_extension():
                     relay_connection = await resolver(

ariadne/utils.py

@@ -1,4 +1,5 @@
 import asyncio
+import inspect
 from collections.abc import Mapping
 from functools import wraps
 from typing import Any, Callable, Optional, Union, cast
@@ -264,3 +265,9 @@ def type_get_extension(
     object_type: GraphQLNamedType, extension_name: str, fallback: Any = None
 ) -> Any:
     return getattr(object_type, "extensions", {}).get(extension_name, fallback)
+
+
+def is_async_callable(obj: Any) -> bool:
+    return inspect.iscoroutinefunction(obj) or (
+        callable(obj) and inspect.iscoroutinefunction(obj.__call__)
+    )

tests/relay/test_objects.py

@@ -271,3 +271,28 @@ def test_relay_node_query_faction(
 
     assert result.errors is None
     assert result.data == {"node": {"bid": "RmFjdGlvbjoy", "name": "Galactic Empire"}}
+
+
+@pytest.mark.asyncio
+async def test_relay_object_resolve_wrapper_awaitable(friends_connection):
+    class Resolver:
+        async def __call__(self, *_, **__):
+            return friends_connection
+
+    object_type = RelayObjectType("User")
+    wrapped_resolver = object_type.resolve_wrapper(Resolver())
+
+    result = await wrapped_resolver(None, None, first=10)
+    assert result == {
+        "totalCount": 2,
+        "edges": [
+            {"node": {"id": "VXNlcjox", "name": "Alice"}, "cursor": "VXNlcjox"},
+            {"node": {"id": "VXNlcjoy", "name": "Bob"}, "cursor": "VXNlcjoy"},
+        ],
+        "pageInfo": {
+            "hasNextPage": False,
+            "hasPreviousPage": False,
+            "startCursor": "VXNlcjox",
+            "endCursor": "VXNlcjoy",
+        },
+    }