for example, when ele.me generates an order, it opens a member, and the payment order price and the member price are paid together. Whether the member purchase record is maintained in the order or in the member, ah, it is often not clear what kind of things should be put in the order system. What can not be put in, very ambiguous
I tend to think of it this way, externally showing and querying mergers to users using external merge orders
in fact, there are different business orders when different business processes. When receiving an order, you can associate it with an external order Id
generally speaking, member purchase records are maintained in the order system because they belong to the category of orders.
member system mainly does user information management and query, such as user points, user permissions, user level, user lottery and so on.
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