fix bug we cannot use optional params

aiohttp_pydantic/injectors.py

@@ -5,6 +5,8 @@ from typing import Callable, Tuple
 from aiohttp.web_request import BaseRequest
 from pydantic import BaseModel
 
+from .utils import is_pydantic_base_model
+
 
 class AbstractInjector(metaclass=abc.ABCMeta):
     """
@@ -98,7 +100,7 @@ def _parse_func_signature(func: Callable) -> Tuple[dict, dict, dict, dict]:
         if param_spec.kind is param_spec.POSITIONAL_ONLY:
             path_args[param_name] = param_spec.annotation
         elif param_spec.kind is param_spec.POSITIONAL_OR_KEYWORD:
-            if issubclass(param_spec.annotation, BaseModel):
+            if is_pydantic_base_model(param_spec.annotation):
                 body_args[param_name] = param_spec.annotation
             else:
                 qs_args[param_name] = param_spec.annotation

aiohttp_pydantic/oas/view.py

@@ -3,27 +3,17 @@ from typing import List, Type
 
 from aiohttp.web import Response, json_response
 from aiohttp.web_app import Application
-from pydantic import BaseModel
 
 from aiohttp_pydantic.oas.struct import OpenApiSpec3, OperationObject, PathItem
 
 from ..injectors import _parse_func_signature
+from ..utils import is_pydantic_base_model
 from ..view import PydanticView, is_pydantic_view
 from .typing import is_status_code_type
 
 JSON_SCHEMA_TYPES = {float: "number", str: "string", int: "integer"}
 
 
-def _is_pydantic_base_model(obj):
-    """
-    Return true is obj is a pydantic.BaseModel subclass.
-    """
-    try:
-        return issubclass(obj, BaseModel)
-    except TypeError:
-        return False
-
-
 class _OASResponseBuilder:
     """
     Parse the type annotated as returned by a function and
@@ -35,7 +25,7 @@ class _OASResponseBuilder:
 
     @staticmethod
     def _handle_pydantic_base_model(obj):
-        if _is_pydantic_base_model(obj):
+        if is_pydantic_base_model(obj):
             return obj.schema()
         return {}
 

aiohttp_pydantic/utils.py

@@ -0,0 +1,11 @@
+from pydantic import BaseModel
+
+
+def is_pydantic_base_model(obj):
+    """
+    Return true is obj is a pydantic.BaseModel subclass.
+    """
+    try:
+        return issubclass(obj, BaseModel)
+    except TypeError:
+        return False

aiohttp_pydantic/view.py

@@ -9,14 +9,8 @@ from aiohttp.web_exceptions import HTTPMethodNotAllowed
 from aiohttp.web_response import StreamResponse
 from pydantic import ValidationError
 
-from .injectors import (
-    AbstractInjector,
-    BodyGetter,
-    HeadersGetter,
-    MatchInfoGetter,
-    QueryGetter,
-    _parse_func_signature,
-)
+from .injectors import (AbstractInjector, BodyGetter, HeadersGetter,
+                        MatchInfoGetter, QueryGetter, _parse_func_signature)
 
 
 class PydanticView(AbstractView):