работает на 100%. Требует доработок и рефакторинга

fastfood/crud.py

@@ -1,5 +1,6 @@
+from re import sub
 from uuid import UUID
-from sqlalchemy import delete, select, update
+from sqlalchemy import delete, func, select, update
 from sqlalchemy.ext.asyncio import AsyncSession
 
 from fastfood import models, schemas
@@ -34,7 +35,22 @@ class Crud:
         async with session:
             query = select(models.Menu).where(models.Menu.id == menu_id)
             menu = await session.execute(query)
-            return menu.scalars().one_or_none()
+            menu = menu.scalars().one_or_none()
+            if menu is None:
+                return None
+            submenu_query = select(func.count(models.SubMenu.id).label("counter")).filter(models.SubMenu.parent_menu == menu_id)
+            counter = await session.execute(submenu_query)
+
+            dish_query = (
+                select(func.count(models.Dish.id))
+                .join(models.SubMenu)
+                .filter(models.Dish.parent_submenu == models.SubMenu.id)
+                .filter(models.SubMenu.parent_menu == menu_id)
+            )
+            dishes = await session.execute(dish_query)
+            menu.submenus_count = counter.scalars().one_or_none()
+            menu.dishes_count = dishes.scalars().one_or_none()
+            return menu
 
     @staticmethod
     async def update_menu_item(menu_id: UUID,
@@ -82,7 +98,19 @@ class Crud:
         async with session:
             query = select(models.SubMenu).where(models.SubMenu.id == submenu_id)
             submenu = await session.execute(query)
-            return submenu.scalars().one_or_none()
+            submenu = submenu.scalars().one_or_none()
+            if submenu is None:
+                return None
+
+            dish_query = (
+                select(func.count(models.Dish.id))
+                .join(models.SubMenu)
+                .filter(models.Dish.parent_submenu == models.SubMenu.id)
+            )
+            dishes = await session.execute(dish_query)
+            submenu.dishes_count = dishes.scalars().one_or_none()
+
+            return submenu
 
     @staticmethod
     async def update_submenu_item(

fastfood/models.py

@@ -1,5 +1,4 @@
 import uuid
-from decimal import Decimal
 from typing import Annotated, List, Optional
 
 from sqlalchemy import ForeignKey
@@ -7,7 +6,7 @@ from sqlalchemy.dialects.postgresql import UUID
 from sqlalchemy.orm import DeclarativeBase, Mapped, mapped_column, relationship
 
 uuidpk = Annotated[
-    int,
+    uuid.UUID,
     mapped_column(
         UUID(as_uuid=True),
         primary_key=True,
@@ -34,7 +33,7 @@ class Menu(Base):
 class SubMenu(Base):
     __tablename__ = "submenu"
 
-    parent_menu: Mapped[uuid.UUID] = mapped_column(ForeignKey("menu.id"))
+    parent_menu: Mapped[uuid.UUID] = mapped_column(ForeignKey("menu.id", ondelete="CASCADE"))
     dishes: Mapped[List["Dish"]] = relationship(
         "Dish", backref="submenu", lazy="dynamic", cascade="all, delete",
     )
@@ -44,4 +43,4 @@ class Dish(Base):
     __tablename__ = "dish"
 
     price: Mapped[float]
-    parent_submenu: Mapped[uuid.UUID] = mapped_column(ForeignKey("submenu.id"))
+    parent_submenu: Mapped[uuid.UUID] = mapped_column(ForeignKey("submenu.id", ondelete="CASCADE"))

fastfood/routes.py

@@ -11,6 +11,11 @@ from fastfood.dbase import get_async_session
 router = APIRouter()
 
 
+def price_converter(dish: dict) -> dict:
+    dish.price = str(dish.price)
+    return dish
+
+
 @router.get("/api/v1/menus", response_model=Optional[List[schemas.Menu]])
 async def get_menus(session: AsyncSession = Depends(get_async_session)):
     result = await crud.get_menus(session=session)
@@ -29,7 +34,7 @@ async def add_menu(
     return result
 
 
-@router.get("/api/v1/menus/{menu_id}", response_model=schemas.Menu)
+@router.get("/api/v1/menus/{menu_id}", response_model=schemas.MenuRead)
 async def get_menu(
         menu_id: UUID,
         session: AsyncSession = Depends(get_async_session),
@@ -82,7 +87,7 @@ async def create_submenu_item(
     return result
 
 
-@router.get("/api/v1/menus/{menu_id}/submenus/{submenu_id}")
+@router.get("/api/v1/menus/{menu_id}/submenus/{submenu_id}", response_model=schemas.SubMenuRead)
 async def get_submenu(
     menu_id: UUID,
     submenu_id: UUID,
@@ -139,7 +144,7 @@ async def create_dish(
         dish=dish,
         session=session,
     )
-    return result
+    return price_converter(result)
 
 
 @router.get("/api/v1/menus/{menu_id}/submenus/{submenu_id}/dishes/{dish_id}")
@@ -154,14 +159,13 @@ async def get_dish(
     )
     if not result:
         raise HTTPException(status_code=404, detail="dish not found")
-    return result
+    return price_converter(result)
 
 
 @router.patch(
-    "/api/v1/menus/{menu_id}/submenus/{submenu_id}/dishes/{dish_id}",
-    response_model=schemas.DishBase,
+    "/api/v1/menus/{menu_id}/submenus/{submenu_id}/dishes/{dish_id}"
 )
-async def update_submenu(
+async def update_dish(
     menu_id: UUID,
     submenu_id: UUID,
     dish_id: UUID,
@@ -171,7 +175,7 @@ async def update_submenu(
     result = await crud.update_dish_item(
         dish_id=dish_id, dish=dish, session=session,
     )
-    return result
+    return price_converter(result)
 
 
 @router.delete("/api/v1/menus/{menu_id}/submenus/{submenu_id}/dishes/{dish_id}")

fastfood/schemas.py

@@ -17,8 +17,16 @@ class Menu(MenuBase):
     id: UUID
 
 
+class MenuRead(Menu):
+    submenus_count: int
+    dishes_count: int
+
+class SubMenuRead(Menu):
+    dishes_count: int
+
+
 class DishBase(MenuBase):
-    price: str
+    price: float
 
 
 class Dish(DishBase, Menu):

fastfood/utils.py

@@ -0,0 +1,4 @@
+
+def convert_price(dish: dict):
+    dish.price = str(dish.price)
+    return dish