Including and excluding helpers in Rails

To include a R开发者_如何学Goails helper, helper :helper_name and to include all helpers, helper :all is specified in the application_controller.

Now, how to include say N-1 of the available helpers? In other words, how to exclude a very few helpers?

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I think you would need to write a custom method (say, all_helpers) to get symbols (:foo) or module names (FooHelper) for all of your helpers (probably via file system calls to the app/helpers directory) and then allow an exclusion list to be passed to the method. Then call it something like:

helper all_helpers(:exclude => :bar)

Take a look at Rails' ActionController::Helpers#all_application_helpers method for details on how to pull helper names from the filesystem.