render default template when requested template is missing in Rails

Question

For a plugin I want to hack the following feature into Rails:

When a (partial) template does not exist (regardless of the format) I want to render a default template

Answer 1

I found a patch that is relatively clean, it only patches the lookup of the template which is exactly what was required in the question.

module ActionView
  class PathSet

    def find_template_with_exception_handling(original_template_path, format = nil, html_fallback = true)
      begin
        find_template_without_exception_handling(original_template_path, format, html_fallback)
      rescue ActionView::MissingTemplate => e
        # Do something with original_template_path, format, html_fallback
        raise e
      end
    end
    alias_method_chain :find_template, :exception_handling

  end
end