如何設置會話的多維數組軌

Question

我試圖做這樣的事情：

session[:continent][:filter] = params[:filter] 

，但它不工作，我得到這個錯誤：

You have a nil object when you didn't expect it! 
You might have expected an instance of Array. 
The error occurred while evaluating nil.[]= 

Answer 1

您需要首先將會話[：continent]初始化爲哈希。試試這個：

session[:continent] ||= {} 
session[:continent][:filter] = params[:filter]