Creating the shopping cart model
It seems like now we have an application up and running, we can display our games, but there's a big issue here. Can you guess what? Okay, this question wasn't so hard, I gave the answer for that in the title of the section. Anyway, our users cannot buy the games—we need to implement a shopping cart so we can start making our users happy!
Now, there are many ways you can implement a shopping cart on an application, but we are going to do it by simply saving the cart items on the database instead of doing an implementation based in the user session.
The requirements for the shopping cart are as follows:
- The users can add as many items they wish
- The users should be able to change the items in the shopping cart; for example, they should be able to change the quantity of an item
- Removal of items should be possible
- There should be an option to empty the shopping cart
- All the data should be validated
- If the user owning that shopping cart is removed, the shopping cart and...
