self.to_prepare(*args, &block) — ActionDispatch::Callbacks

self.to_prepare(*args, &block)

Add a preparation callback. Preparation callbacks are run before every request in development mode, and before the first request in production mode.

If a symbol with a block is given, the symbol is used as an identifier. That allows to_prepare to be called again with the same identifier to replace the existing callback. Passing an identifier is a suggested practice if the code adding a preparation block may be reloaded.

Parameters

args rest
block block

Source

# File actionpack/lib/action_dispatch/middleware/callbacks.rb, line 21
    def self.to_prepare(*args, &block)
      if args.first.is_a?(Symbol) && block_given?
        define_method :"__#{args.first}", &block
        set_callback(:prepare, :"__#{args.first}")
      else
        set_callback(:prepare, *args, &block)
      end
    end

Defined in actionpack/lib/action_dispatch/middleware/callbacks.rb line 21 · View on GitHub · Improve this page · Find usages on GitHub

Defined in ActionDispatch::Callbacks

Signature

Parameters