Check if the user has permission to perform a given action on an object

Add ability are allowed using two arguments. The first one is the action you're setting the permission for, the second one i

Defines an ability which cannot be done.

Alias one or more actions into another one. self.alias_action('create', 'read', 'update', 'delete', to='crud')

Convenience method which works the same as "can" but returns the opposite value.

Accepts an array of actions and returns an array of actions which match

Matches both the subject and action, not necessarily the conditions.

retrive match action and subject

The first argument when initializing is the base_behavior which is a true/false value. True for "can" and false for "cannot".