if a specification of a product has been added to the shopping cart, and the merchant deletes the specification after a period of time, won"t users who have added this specification to the shopping cart make an error when browsing the shopping cart? What are we going to do?
you can clean the shopping cart at the same time as you delete it, or mark the shopping cart as invalid.
you can also store specifications directly when saving data instead of saving ID, settlement
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