Database Table Design

Question

I want to know you opinion and what should be the best approach for this case:

I have 2 table called: - clients; - suppliers;

I've create 2 pages for people to leave feedback about a client and for a supplier. With that in mind a created a table feedbacks.

Now the question is which approach should I choose:

1) Create one table called feedbacks with 2 foreign keys (clientid and supplierid). With this approach if they leave a feedback to the client then the FK supplierid would be empty.

2) create 2 tables called clientfeedbacks and suppliersfeedback. With this approach since each table would only have one FK then no FK would be empty.

Thank you.

Answer 1

Why not just have one table called feedback, and then two separate join tables: client_feedback that maps client_id to feedback_id and then supplier_feedback that amps supplier_id to feedback_id? (has_many through in rails speak)