I've been trying to read ActiveRecord tutorials etc. but haven't figured out how to get the information I want. Let's say I have a users who own one to many bookshelves and some of these bookshelves contain books. Now I would like to get a list of books that belong to user named Timeon:
SELECT books.name FROM books, shelves, users WHERE books.shelve_id=shelves.id AND shelves.owner_id=users.id AND users.name='Timeon';
The models would be something like this (from the top of my head, may not be correct):
Class User < ActiveRecord::Base has_many :book_shelves end
Class BookShelve < ActiveRecord::Base belongs_to :user has_many :books end
Class Book < ActiveRecord::Base belongs_to :book_shelves end
So, how to get a list of Book objects that belong to user named Timeon with a single line of code? Most examples I've seen first find the user, then they list the shelves etc. but I would expect something this trivial to be simple to achieve with a single call.