“Episode 192 - Authorization with CanCan”

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we covered Declarative Authorization . While it is an excellent authorization plugin for Rails it can be a little heavy for simpler sites. After writing the Railscast on Declarative Authorization Ryan Bates looked for an alternative solution and, failing to find one that suited his needs, decided to write his own, CanCan . CanCan is a simple authorization plugin and Ryan has tried to keep everything as simple as he could when writing it. Let’s dive in and take a look at it.

Full article: http://asciicasts.com/episodes/192-authorization-with-cancan