登录问题

app/controllers/libraries_controller.rb

@@ -1,7 +1,7 @@
 class LibrariesController < ApplicationController
   layout 'base_library'
 
-  before_filter :require_login, :except => [:index]
+  before_filter :require_login, :except => [:index, :show]
   after_filter :increment_visit_count, only: [:show, :create, :edit, :update]
 
   def index
@@ -121,7 +121,7 @@ class LibrariesController < ApplicationController
   end
 
   def admin_or_self?
-    current_library.user_id == current_user.id || admin_or_business?
+    current_library.try(:user_id) == current_user.try(:id) || admin_or_business?
   end
 
   def increment_visit_count