method

to_prepare

rails latest stable - Class: Dispatcher

to_prepare(identifier = nil, &block)

public

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

An optional identifier may be supplied for the callback. If provided, to_prepare may 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.

# File railties/lib/dispatcher.rb, line 75
    def to_prepare(identifier = nil, &block)
      unless identifier.nil?
        callback = preparation_callbacks.detect { |ident, _| ident == identifier }

        if callback # Already registered: update the existing callback
          callback[-1] = block
          return
        end
      end

      preparation_callbacks << [identifier, block]

      return
    end

to_prepare

Method deprecated or moved

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