Epic: Shopping Cart and Checkout

[iandouglas]

Shopping Cart and Checkout

This is what this app is all about: how a user can put things in a shopping cart and check out, creating an order in the process.

Visitors and Regular Users only

Merchants and Admin users cannot order items. This will cause a conflict in the project if an admin upgrades a user to a merchant and that user had previous orders of their own. We're not going to worry about this conflict.