註冊控制器如何使用Devise登錄用戶

Question

我有一個使用Devise進行用戶認證的Rails應用程序。如果用戶使用註冊表單註冊，但他碰巧使用現有的有效用戶名/密碼，而不是提供錯誤，我只想登錄用戶。但我無法弄清楚如何做到這一點。

有什麼建議嗎？

Answer 1

您將需要重寫設計RegistrationsController創建操作。在常規註冊碼之後，您需要添加代碼以檢查用戶是否已經存在，並在電子郵件/密碼組合匹配時登錄。像這樣的東西（根據您所使用的色器件版本 - 這是基於2.2.4來源）

class RegistrationsController < Devise::RegistrationsController 
     def create 
     build_resource 

     if resource.save 
      if resource.active_for_authentication? 
      set_flash_message :notice, :signed_up if is_navigational_format? 
      sign_up(resource_name, resource) 
      respond_with resource, :location => after_sign_up_path_for(resource) 
      else 
      set_flash_message :notice, :"signed_up_but_#{resource.inactive_message}" if is_navigational_format? 
      expire_session_data_after_sign_in! 
      respond_with resource, :location => after_inactive_sign_up_path_for(resource) 
      end 
     else 
      # Add code to check if user exists and sign in 
      # I am just pasting in the sign_in code here and you will need to customize it as per your needs 
      # You can directly use params and User model, or try an keep your code generic 
      self.resource = warden.authenticate!(auth_options) 
      set_flash_message(:notice, :signed_in) if is_navigational_format? 
      sign_in(resource_name, resource) 
      respond_with resource, :location => after_sign_in_path_for(resource) 
     end 
     end 
end 

而且控制器添加到您的路線以及：

devise_for :users, :controllers => { :registrations => "registrations"}