Ruby on Rails Devise-无法注销

我对Rails（v4.0.0）和Devise（v3.5.2）上的Ruby（v2.0.0）有点陌生，并且由于某种原因，一旦注册后就无法退出。但是，如果我手动进入MySQL2数据库并完全删除用户，则“注册/登录”页面将再次变为可用。

我没有触摸过session_store.rb初始化程序或其他任何东西。我身处困境，需要先解决此问题，然后才能继续前进。

非常感谢您的帮助。

我的“注册”表单的逻辑非常简单：

<% if user_signed_in? %>
    <%= current_user.email %> / <%= link_to "Sign Out", destroy_user_session_path, method: :delete %>
<% else %>
    <%= link_to "Sign Up", new_user_registration_path %> / <%= link_to "Log In", new_user_session_path %>
<% end %> 

我的devise.rb文件还配置为使用：delete：

config.sign_out_via = :delete

我的Gemfile中有JQuery：

# jQuery
gem 'jquery-rails'
gem 'jquery-ui-rails'

我在application.js中初始化了它们：

//= require jquery
//= require jquery_ujs
//= require jquery.ui.all
//= require jquery.details
//= require jquery.textchange

我的route.rb已正确配置（注释掉的“ #devise_for：users”表明我已经尝试了两种方法，但均无效果）：

Selfstarter::Application.routes.draw do
root :to => 'home#index'
  #devise_for :users
  devise_for :users do
  get '/users/sign_out' => 'devise/sessions#destroy'
  end
...
end

我的耙路反映出：

                  Prefix Verb     URI Pattern                     Controller#Action
                    root GET      /                               home#index
        new_user_session GET      /users/sign_in(.:format)        devise/sessions#new
            user_session POST     /users/sign_in(.:format)        devise/sessions#create
    destroy_user_session DELETE   /users/sign_out(.:format)       devise/sessions#destroy
           user_password POST     /users/password(.:format)       devise/passwords#create
       new_user_password GET      /users/password/new(.:format)   devise/passwords#new
      edit_user_password GET      /users/password/edit(.:format)  devise/passwords#edit
                         PATCH    /users/password(.:format)       devise/passwords#update
                         PUT      /users/password(.:format)       devise/passwords#update
cancel_user_registration GET      /users/cancel(.:format)         devise/registrations#cancel
       user_registration POST     /users(.:format)                devise/registrations#create
   new_user_registration GET      /users/sign_up(.:format)        devise/registrations#new
  edit_user_registration GET      /users/edit(.:format)           devise/registrations#edit
                         PATCH    /users(.:format)                devise/registrations#update
                         PUT      /users(.:format)                devise/registrations#update
                         DELETE   /users(.:format)                devise/registrations#destroy

user.rb型号：

class User < ActiveRecord::Base
  has_many :orders
  # Include default devise modules. Others available are:
  # :confirmable, :lockable, :timeoutable and :omniauthable
  devise :database_authenticatable, :registerable,
         :recoverable, :rememberable, :trackable, :validatable
end

万一需要它，请使用database.rb：

development:
  adapter: mysql2
  encoding: utf8
  reconnect: false
  database: dbname
  pool: 5
  username: dbusername
  password: dbpass
  #socket: /opt/local/var/run/mysql5/mysqld.sock

我不知道下一步该怎么做，并搜寻了Google和Stack Overflow。我什么都没找到。

我还要提及的是，我真的很想遵守RESTful约定，并且尽可能不要使用：get方法。

编辑：我的日志文件

Started DELETE "/users/sign_out" for 127.0.0.1 at 2015-08-21 11:28:17 -0400
Started DELETE "/users/sign_out" for 127.0.0.1 at 2015-08-21 11:28:17 -0400
Processing by Devise::SessionsController#destroy as HTML
Processing by Devise::SessionsController#destroy as HTML
  User Load (3.0ms)  SELECT `users`.* FROM `users` WHERE `users`.`id` = 1 ORDER BY `users`.`id` ASC LIMIT 1
  User Load (3.0ms)  SELECT `users`.* FROM `users` WHERE `users`.`id` = 1 ORDER BY `users`.`id` ASC LIMIT 1
Can't verify CSRF token authenticity
Can't verify CSRF token authenticity
   (1.0ms)  BEGIN
   (1.0ms)  BEGIN
   (1.0ms)  COMMIT
   (1.0ms)  COMMIT
Redirected to http://localhost:3000/
Redirected to http://localhost:3000/
Completed 302 Found in 66ms (ActiveRecord: 5.0ms)
Completed 302 Found in 66ms (ActiveRecord: 5.0ms)