Database design for a sell/rent eCommerce - mysql

Question

I am working on my school project to create an eCommerce website that sell and rent product.
My main problem is that I can't find the best design for the "Renting" part. For now I am thinking about two designs:
The first database design suggestion:
The second database design suggestion:
As you can see there are the same tables in both designs but with different relations, but I can't tell which one is better.
I will be happy if you can tell me which design is better or if there is a better way to design my database altogether.

Answer 1

Think of your problem from the real-life perspective:
You will be offering “something”, being products in your schema;
You will be working with “somebody” or customers in your schema.
These 2 tables are most important, as without them the whole thing has no meaning.
Next, in real life, you have to have papers for each deal you'll make in order to:
Report to authorities and pay taxes (don't you like to pay taxes?);
Keep track of products that are “on hands” of your customers.
These are orders of 2 types: purchase and rent.
Note, though, that it is unlikelly to rent a set of products with different return dates in one order. Typically, one will rent a set of related items for some special case, like wedding celebration or bathroom repair. In case you need some products for 2 days while others for 2 weeks, it is better to create 2 orders, as different delivery conditions or discounts may apply.
Therefore I think that initial variant #1 matches your goal better with the following updates:
order_type column should be added to the orders table;
rent_details should relate to orders table;
rent_details should have only order_id in place of rent_detail_id + order_items_id;
it very necessary to have a separate price column in the order_items table along with discount;