Added handling for situation, when we have user_id in session, but th…

…is user is already deleted

app/controllers/application_controller.rb

@@ -347,6 +347,9 @@ def sanitize_heading(h)
 
   def current_user
     @current_user ||= User.find(session[:user_id]) if session[:user_id]
+  rescue ActiveRecord::RecordNotFound
+    # Should only happen in development environment
+    session.delete(:user_id)
   end
 
   def html_entities_coder