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mycopunk-swag-store
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fix: resolve async SQLAlchemy lazy loading issue in cart service 

Use get_cart() with selectinload instead of refresh() to avoid
greenlet_spawn errors when accessing cart.items relationship.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
This commit is contained in:
Jeff Emmett 2026-02-01 00:07:10 +00:00
parent 286eb2f06c
commit 169b63160d
1 changed files with 9 additions and 5 deletions
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14
backend/app/services/cart_service.py
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@ -21,7 +21,13 @@ class CartService:
cart = Cart() cart = Cart()
self.db.add(cart) self.db.add(cart)
await self.db.commit() await self.db.commit()
await self.db.refresh(cart) # Re-fetch with items loaded to avoid lazy loading issues
result = await self.db.execute(
select(Cart)
.where(Cart.id == cart.id)
.options(selectinload(Cart.items))
)
cart = result.scalar_one()
return self._cart_to_response(cart) return self._cart_to_response(cart)
async def get_cart(self, cart_id: UUID) -> CartResponse | None: async def get_cart(self, cart_id: UUID) -> CartResponse | None:
@ -59,8 +65,7 @@ class CartService:
): ):
existing.quantity += item.quantity existing.quantity += item.quantity
await self.db.commit() await self.db.commit()
await self.db.refresh(cart) return await self.get_cart(cart_id)
return self._cart_to_response(cart)
# Add new item # Add new item
cart_item = CartItem( cart_item = CartItem(
@ -73,8 +78,7 @@ class CartService:
) )
self.db.add(cart_item) self.db.add(cart_item)
await self.db.commit() await self.db.commit()
await self.db.refresh(cart) return await self.get_cart(cart_id)
return self._cart_to_response(cart)
async def update_item( async def update_item(
self, self,