从Cookie会话更改为服务器端会话存储（Devise，Rails）后，用户无法登录

Question

我还更改了Cookie的域，使其可以在子域上使用（“从domain.com cookie切换到.domain.com cookie

问题是用户无法登录。除非他们清除cookie或以隐身模式登录。

用户登录后，他们将被直接带回到登录页面，而不会出现任何错误。

日志显示除302之外没有其他错误，这是一个示例：

  Started POST "/users/sign-in" for 174.235.55.66 at 2015-05-16 18:38:20 +0000 
May 16 11:38:21 abc app/web.1:  Processing by Users::SessionsController#create as HTML 
May 16 11:38:21 abc app/web.1:    Parameters: {"utf8"=>"✓", "user"=>{"email"=>"email@domain.com", "password"=>"[FILTERED]", "remember_me"=>"0"}} 
May 16 11:38:21 abc heroku/router:  at=info method=POST path="/users/sign-in" host=www.bidvine.com request_id=f3f8fd11-acc5-443a-866d-46c554bcabb1 fwd="70.53.68.47,173.245.55.66" dyno=web.1 connect=1ms service=454ms status=302 bytes=794 
May 16 11:38:21 abc app/web.1:  Redirected to http://www.bidvine.com/admin 
May 16 11:38:21 abc app/web.1:  Completed 302 Found in 392ms (ActiveRecord: 35.2ms) 
May 16 11:38:21 abc app/web.2:  Processing by Admin::RequestsController#index as HTML 
May 16 11:38:21 abc app/web.3:  Started GET "/users/sign-in" for 173.245.55.66 at 2015-05-16 18:38:21 +0000