So far we've seen how to build an authentication system that lets users sign up, log in, and log out. In addition to authentication, many web apps have a way to give specific users permission to a...

Using the request/response cycle as a guide, here's how authorization fits in: 1. The browser makes a request for a URL 2. The request hits the Rails router 3. Before the router sends the request...

Great! In the users table, we now have a column named [...] that we can use to assign different roles to users, such as "editor" or "admin".

We created a method named [...] that checks whether a user's role is "editor", and returns [...] or [...] . The method uses [...] to refer to the current instance of a User object. Now that...

Great work! The role-based authorization system is working. Users with an editor role have permissions to see the edit page, while users without that role do not.

Great job! We now have a way to determine whether a user has an admin role on the site. Let's add a few methods to the Application controller to make sure that users with the admin role can access ...

Congratulations! You built a authorization system from scratch. 1. The role column in the User model specifies a users' role 2. A method like [...] and [...] is created for business logic 3....