Add sub-app to generate open api spec

demo/view.py

@@ -0,0 +1,28 @@
+from aiohttp_pydantic import PydanticView
+from aiohttp import web
+
+from .model import Pet
+
+
+class PetCollectionView(PydanticView):
+    async def get(self):
+        pets = self.request.app["model"].list_pets()
+        return web.json_response([pet.dict() for pet in pets])
+
+    async def post(self, pet: Pet):
+        self.request.app["model"].add_pet(pet)
+        return web.json_response(pet.dict())
+
+
+class PetItemView(PydanticView):
+    async def get(self, id: int, /):
+        pet = self.request.app["model"].find_pet(id)
+        return web.json_response(pet.dict())
+
+    async def put(self, id: int, /, pet: Pet):
+        self.request.app["model"].update_pet(id, pet)
+        return web.json_response(pet.dict())
+
+    async def delete(self, id: int, /):
+        self.request.app["model"].remove_pet(id)
+        return web.json_response(id)