The request
“Create a domain model for a marketplace with a User base class for sellers and customers, products and categories, and orders containing line items.”
Then tryAdd product reviews from customers.Add a shipping address to Order.
What is in this drawing
Read the decisions behind it.
01
Use abstract User class to generalize Seller and Customer
02
Model Order as a composition of LineItems referencing Products
03
Show multiplicity to enforce business rules like one seller listing many products
Reusable for any multi-vendor e-commerce platform that needs a clear domain model for seller and product management.
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