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由 Jeremy Kemper 提交于
Introduce ActionController::Base.rescue_from to declare exception-handling methods. Cleaner style than the case-heavy rescue_action_in_public. Closes #9449. git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@7597 5ecf4fe2-1ee6-0310-87b1-e25e094e27de
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