seed vehicle trims catalog

app/api/catalog.py

@@ -4,7 +4,7 @@ from sqlalchemy.ext.asyncio import AsyncSession
 from sqlalchemy.orm import selectinload
 
 from app.db.session import get_session
-from app.models.car import CarMake
+from app.models.car import CarMake, CarModel
 from app.schemas.car import CarMakeRead
 
 router = APIRouter(prefix="/catalog", tags=["catalog"])
@@ -13,9 +13,13 @@ router = APIRouter(prefix="/catalog", tags=["catalog"])
 @router.get("/makes", response_model=list[CarMakeRead])
 async def list_makes(session: AsyncSession = Depends(get_session)) -> list[CarMake]:
     result = await session.execute(
-        select(CarMake).options(selectinload(CarMake.models)).order_by(CarMake.name)
+        select(CarMake)
+        .options(selectinload(CarMake.models).selectinload(CarModel.trims))
+        .order_by(CarMake.name)
     )
     makes = list(result.scalars())
     for make in makes:
         make.models.sort(key=lambda model: model.name)
+        for model in make.models:
+            model.trims.sort(key=lambda trim: trim.name)
     return makes