Best way to handle 404s in a defined route

[willowlight]

I have the not_found plugin installed which works great for non-defined routes. But if I have a route that is defined such as

/news/:id

But then the :id is non-existent in the database, what's the best way to turn it into a 404 and keeping it DRY?

Currently I'm doing this, which just shows a 404 view, but does not have the correct response header:

      if @content
          view :single
      else
          view '404'
      end

Thanks!

[jeremyevans]

You can also use the not_found plugin for this.

plugin :not_found do
  view '404'
end

in your route:

  view :single if @content

By default, the not_found plugin block is called whenever have you have a request where the response body has not been written to (route blocks that return a String write to the body), unless you have modified the status to be something other than 404.

[willowlight]

Works great. Thanks!