Class: ActiveSupport::Deprecation

Inherits:
Object
  • Object
show all
Defined in:
lib/maglev_record/maglev_support/active_support_patch.rb

Class Method Summary collapse

Class Method Details

.deprecate_methods(target_module, *method_names) ⇒ Object

Declare that a method has been deprecated.



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# File 'lib/maglev_record/maglev_support/active_support_patch.rb', line 4

def deprecate_methods(target_module, *method_names)
  options = method_names.extract_options!
  method_names += options.keys
  method_names.each do |method_name|
    next unless method_name.respond_to?(:to_sym)  # next if Fixnum
    next if method_name == :none                  # check from rubygems/deprecate.rb
    next if method_name.to_s.include?(".")             # . in method names is not allowed
    # workaround for :==
    if method_name.to_sym == :==
      method_name = "equal?"
    end
    target_module.alias_method_chain(method_name, :deprecation) do |target, punctuation|
      target_module.module_eval(<<-end_eval, __FILE__, __LINE__ + 1)
        def #{target}_with_deprecation#{punctuation}(*args, &block)
          ::ActiveSupport::Deprecation.warn(
            ::ActiveSupport::Deprecation.deprecated_method_warning(
              :#{method_name},
              #{options[method_name].inspect}),
            caller
          )
          send(:#{target}_without_deprecation#{punctuation}, *args, &block)
        end
      end_eval
    end
  end
end