also find "request" param by type annotation

this re-enables (worked before 1.0) view signatures like

`def view(_: HttpRequest)` to avoid linters complaining about the unused
`request` param

ninja/signature/details.py

@@ -4,7 +4,7 @@
 from typing import Any, Callable, Dict, Generator, List, Optional, Tuple
 
 import pydantic
-from django.http import HttpResponse
+from django.http import HttpRequest, HttpResponse
 from pydantic.fields import FieldInfo
 from pydantic_core import PydanticUndefined
 from typing_extensions import Annotated, get_args, get_origin
@@ -53,8 +53,11 @@ def __init__(self, path: str, view_func: Callable) -> None:
 
         self.params = []
         for name, arg in self.signature.parameters.items():
-            if name == "request":
-                # TODO: maybe better assert that 1st param is request or check by type?
+            annotation = arg.annotation
+            if name == "request" or (
+                isinstance(annotation, type) and issubclass(annotation, HttpRequest)
+            ):
+                # TODO: maybe better assert that 1st param is request
                 # maybe even have attribute like `has_request`
                 # so that users can ignore passing request if not needed
                 continue

tests/test_signature_details.py

@@ -2,8 +2,9 @@
 from sys import version_info
 
 import pytest
+from django.http import HttpRequest
 
-from ninja.signature.details import is_collection_type
+from ninja.signature.details import ViewSignature, is_collection_type
 
 
 @pytest.mark.parametrize(
@@ -49,3 +50,19 @@
 )
 def test_is_collection_type_returns(annotation: typing.Any, expected: bool):
     assert is_collection_type(annotation) is expected
+
+
+def test_finds_request_param_by_name():
+    def view(request):
+        pass
+
+    signature = ViewSignature("", view)
+    assert signature.models == []
+
+
+def test_finds_request_param_by_type():
+    def view(_: HttpRequest):
+        pass
+
+    signature = ViewSignature("", view)
+    assert signature.models == []