Django Tutorial Not Filtering in Part 8

I’m working my way through the MDN Django tutorial and have run into a snag in Part 8 where I’m supposed to end up with a list of the current user’s borrowed books. I’ve copied the code correctly, as far as I can tell, including the code for the LoanedBooksByUserListView.get_query() method, but the myborrowed/ page lists all books, including those borrowed by other users and those not on loan.

Where should I look to start figuring out what I’m doing wrong?

Arrgh. I hate vgrepping for typos. Can someone delete this thread?