Question

I have a User model and a Book model.

Book is declared to belongs_to :user.

How do I get all books belonging to a specific user?

Answer 1

You also need to declare in User:

has_many :books

After that you can access it via the ruby console or if you want it in rails you need to create a route in the routes.rb:

  resources :books do
    resources :users
  end

After that you can ask the controller for all books of one user.
Just call books on a user in the controller.

And if you somewhere else in your code need all books for a certain user (e.g. @user):

@user.books