CakePHP ACL-like plugin for Ruby on Rails

Is there any CakePHP ACL-like plugin for 开发者_如何学PythonRails?

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Although I'm not directly familiar with CakePHP's ACL functionality, you might want to check out CanCan by Ryan Bates:

CanCan is an authorization library for Ruby on Rails which restricts what resources a given user is allowed to access. All permissions are defined in a single location (the Ability class) and not duplicated across controllers, views, and database queries.