我正在使用switch_user宝石这个question几乎与我的问题完全相同。我在问题中尝试过同样的事情，就像readme所说的那样。这是我试过的代码。
config.controller_guard = { |current_user, request, original_user|
current_user && current_user.has_role? :admin || original_user}
# view_guard is a block,
# if it returns true, the switch user select box will be shown,
# else the select box will not be shown
# if you switch from admin to "user", the current_user param is "user"
config.view_guard = { |current_user, request, original_user|
current_user && current_user.has_role? :admin || original_user}
# redirect_path is a block, it returns which page will be redirected
# after switching a user.
# if lambda{|current_user| current_user.admin?}
# config.redirect_path = lambda{|request,params| "/admin_dashboard"}
# elsif lambda{|current_user| current_user.performer?}
# config.redirected_path = lambda{|request,params| "/"}
# elsif lambda{|current_user| current_user.white_label?}
# config.redirected_path = lambda{|request,params| "/white_label_dashboard"}
# else
# config.redirected_path = lambda{|request,params| "/customer_dashboard"}
# end
# helper_with_guest is a boolean value, if it set to false
# the guest item in the helper won't be shown
config.helper_with_guest = false
# false = login from one scope to another and you are logged in only in both scopes
# true = you are logged only into one scope at a time
config.login_exclusive = true
# switch_back allows you to switch back to a previously selected user. See
# README for more details.
config.switch_back = true
我仍然无法切换回来。如何找到原始用户？