PLEASE CHECK YOUR EMAIL. DATABASE CHANGES!!!!!

PLEASE CHECK YOUR EMAIL! PLEASE CHECK YOUR EMAIL! PLEASE CHECK YOUR
EMAIL! PLEASE CHECK YOUR EMAIL! PLEASE CHECK YOUR EMAIL! PLEASE CHECK
YOUR EMAIL! PLEASE CHECK YOUR EMAIL! Apparently, foreign keys work
different in postgres than mysql. chapter table was not working right
because the primary key and foreign key were working as two different
constraints on the same table. email explains more.