我正在尝试做这样的事情:
session[:continent][:filter] = params[:filter]
但它不起作用，我得到了这个错误:
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.[]=
最佳答案
您需要初始化session [:continent]首先成为哈希。尝试这个:
session[:continent] ||= {}
session[:continent][:filter] = params[:filter]