rails的before_filter，如果except子controller中的action skip_filter
如题，在http://stackoverflow.com/questions/2390178/skip-before-filter-in-rails 找到了答案。
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问：
I have three controllers: dog, cat, and horse.These controllers all inherit from the controller animal.In the controller animal, I have a before filter that authenticates a user as such:
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class Dog < Animal skip_before_filter :authenticateend
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See ActionController::Filters::ClassMethods for more info on filters and inheritance.
