如何簡化我的嵌套sinatra路線？

Question

我需要在我的sinatra應用程序中嵌套的子目錄，我怎樣才能簡化這個重複的代碼？

# ------------- SUB1 -------------- 
get "/:theme/:sub1/?" do 
    haml :"pages/#{params[:theme]}/#{params[:sub1]}/index" 
end 

# ------------- SUB2 -------------- 
get "/:theme/:sub1/:sub2/?" do 
    haml :"pages/#{params[:theme]}/#{params[:sub1]}/#{params[:sub2]}/index" 
end 

# ------------- SUB3 -------------- 
get "/:theme/:sub1/:sub2/:sub3/?" do 
    haml :"pages/#{params[:theme]}/#{params[:sub1]}/#{params[:sub2]}/#{params[:sub3]}/index" 
end 

# ------------- SUB4 -------------- 
get "/:theme/:sub1/:sub2/:sub3/:sub4/?" do 
    haml :"pages/#{params[:theme]}/#{params[:sub1]}/#{params[:sub2]}/#{params[:sub3]}/#{params[:sub4]}/index" 
end 

Answer 1

您可以使用圖示參數：

get "/:theme/*/?" do 
    haml "pages/#{params[:theme]}/#{params[:splat].to_s}/index".to_sym 
end