method

require_dependency

v6.0.0 - Show latest stable - 1 note - Class: ActiveSupport::Dependencies::Loadable

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require_dependency(file_name, message = "No such file to load -- %s.rb") public

Interprets a file using mechanism and marks its defined constants as autoloaded. file_name can be either a string or respond to to_path.

Use this method in code that absolutely needs a certain constant to be defined at that point. A typical use case is to make constant name resolution deterministic for constants with the same relative name in different namespaces whose evaluation would depend on load order otherwise.

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# File activesupport/lib/active_support/dependencies.rb, line 274
      def require_dependency(file_name, message = "No such file to load -- %s.rb")
        file_name = file_name.to_path if file_name.respond_to?(:to_path)
        unless file_name.is_a?(String)
          raise ArgumentError, "the file name must either be a String or implement #to_path -- you passed #{file_name.inspect}"
        end

        Dependencies.depend_on(file_name, message)
      end

July 4, 2010

4 thanks

Common use

I typically use require_dependency when developing a class or module that resides in my rails app, perhaps in the lib/ dir. A normal require statement does not reload my changes, so I use require_dependency in files that reference my newly developed class or module.

require_dependency

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Common use