Rails Routing: Flexible Resource Path depending on attributes

How could you make a route for resource be flexible enough depending on its attributes?

For example,

resources :articles, param: :article_slug do
    member do
      resources :comments
    end
end

Article has attributes of title, category, slug, etc

But the client wants it that the category must be the first present in url, such as: /entertainment/articles/:article_slug/comments/:id or /sports/articles/:article_slug/comments/:id. I don't know what is the right approach for this one.

Try

scope path: ':category' do
  resources :articles, param: :article_slug do
      resources :comments
      end
  end
end

And generate the url in this way,

article_comment_path(@article, @comment, category: @article.category)