2

我只是在这样的用户模型中使用了 before_save 回调。

class User < ActiveRecord::Base
before_save :limited_sign_up_inactive
 private 
    def limited_sign_up_inactive
      @allowed_emails = LimitedSignup.pluck(:email)
      unless @allowed_emails.include? self.email
        self.status = false   #getting error  in this line
      end
    end
end

收到此错误

NoMethodError at /users
undefined method `users_url' for #<Devise::RegistrationsController:0xb4b8c18>

在使用这条线时

self.status = false

我想在根据条件保存之前将状态更改为 false。帮我解决这个问题。

提前致谢。

我的环境详细信息：

Ubuntu 12.04 + Rails 3.2.13 + 设计 2.2.4

更新1：

路线.rb

devise_for :users

devise_scope :user do
    root to: "devise/sessions#new"
    get "sign_in", :to => "devise/sessions#new"
end

更新 2：

回溯：

NoMethodError - undefined method `users_url' for #<Devise::RegistrationsController:0xb4b8c18>:
  actionpack (3.2.13) lib/action_dispatch/routing/polymorphic_routes.rb:129:in `polymorphic_url'
  actionpack (3.2.13) lib/action_dispatch/routing/url_for.rb:150:in `url_for'
  actionpack (3.2.13) lib/action_controller/metal/redirecting.rb:105:in `_compute_redirect_to_location'
  actionpack (3.2.13) lib/action_controller/metal/redirecting.rb:74:in `redirect_to'
  actionpack (3.2.13) lib/action_controller/metal/flash.rb:25:in `redirect_to'
  actionpack (3.2.13) lib/action_controller/metal/instrumentation.rb:60:in `block in redirect_to'
  activesupport (3.2.13) lib/active_support/notifications.rb:123:in `block in instrument'
  activesupport (3.2.13) lib/active_support/notifications/instrumenter.rb:20:in `instrument'
  activesupport (3.2.13) lib/active_support/notifications.rb:123:in `instrument'
  actionpack (3.2.13) lib/action_controller/metal/instrumentation.rb:59:in `redirect_to'
  actionpack (3.2.13) lib/action_controller/metal/responder.rb:135:in `redirect_to'
  actionpack (3.2.13) lib/action_controller/metal/responder.rb:193:in `navigation_behavior'
  actionpack (3.2.13) lib/action_controller/metal/responder.rb:162:in `rescue in to_html'
  actionpack (3.2.13) lib/action_controller/metal/responder.rb:160:in `to_html'
  actionpack (3.2.13) lib/action_controller/metal/responder.rb:153:in `respond'
  actionpack (3.2.13) lib/action_controller/metal/responder.rb:146:in `call'
  actionpack (3.2.13) lib/action_controller/metal/mime_responds.rb:239:in `respond_with'
  devise (2.2.4) app/controllers/devise/registrations_controller.rb:27:in `create'
  actionpack (3.2.13) lib/action_controller/metal/implicit_render.rb:4:in `send_action'
  actionpack (3.2.13) lib/abstract_controller/base.rb:167:in `process_action'
  actionpack (3.2.13) lib/action_controller/metal/rendering.rb:10:in `process_action'
  actionpack (3.2.13) lib/abstract_controller/callbacks.rb:18:in `block in process_action'
  activesupport (3.2.13) lib/active_support/callbacks.rb:436:in `_run__865168007__process_action__622589868__callbacks'
  activesupport (3.2.13) lib/active_support/callbacks.rb:405:in `__run_callback'
  activesupport (3.2.13) lib/active_support/callbacks.rb:385:in `_run_process_action_callbacks'
  activesupport (3.2.13) lib/active_support/callbacks.rb:81:in `run_callbacks'
  actionpack (3.2.13) lib/abstract_controller/callbacks.rb:17:in `process_action'
  actionpack (3.2.13) lib/action_controller/metal/rescue.rb:29:in `process_action'
  actionpack (3.2.13) lib/action_controller/metal/instrumentation.rb:30:in `block in process_action'
  activesupport (3.2.13) lib/active_support/notifications.rb:123:in `block in instrument'
  activesupport (3.2.13) lib/active_support/notifications/instrumenter.rb:20:in `instrument'
  activesupport (3.2.13) lib/active_support/notifications.rb:123:in `instrument'
  actionpack (3.2.13) lib/action_controller/metal/instrumentation.rb:29:in `process_action'
  actionpack (3.2.13) lib/action_controller/metal/params_wrapper.rb:207:in `process_action'
  activerecord (3.2.13) lib/active_record/railties/controller_runtime.rb:18:in `process_action'
  actionpack (3.2.13) lib/abstract_controller/base.rb:121:in `process'
  actionpack (3.2.13) lib/abstract_controller/rendering.rb:45:in `process'
  actionpack (3.2.13) lib/action_controller/metal.rb:203:in `dispatch'
  actionpack (3.2.13) lib/action_controller/metal/rack_delegation.rb:14:in `dispatch'
  actionpack (3.2.13) lib/action_controller/metal.rb:246:in `block in action'
  actionpack (3.2.13) lib/action_dispatch/routing/route_set.rb:73:in `dispatch'
  actionpack (3.2.13) lib/action_dispatch/routing/route_set.rb:36:in `call'
  actionpack (3.2.13) lib/action_dispatch/routing/mapper.rb:42:in `call'
  journey (1.0.4) lib/journey/router.rb:68:in `block in call'
  journey (1.0.4) lib/journey/router.rb:56:in `call'
  actionpack (3.2.13) lib/action_dispatch/routing/route_set.rb:612:in `call'
  meta_request (0.2.8) lib/meta_request/middlewares/app_request_handler.rb:13:in `call'
  rack-contrib (1.1.0) lib/rack/contrib/response_headers.rb:17:in `call'
  meta_request (0.2.8) lib/meta_request/middlewares/headers.rb:16:in `call'
  meta_request (0.2.8) lib/meta_request/middlewares/meta_request_handler.rb:13:in `call'
  warden (1.2.3) lib/warden/manager.rb:35:in `block in call'
  warden (1.2.3) lib/warden/manager.rb:34:in `call'
  actionpack (3.2.13) lib/action_dispatch/middleware/best_standards_support.rb:17:in `call'
  rack (1.4.5) lib/rack/etag.rb:23:in `call'
  rack (1.4.5) lib/rack/conditionalget.rb:35:in `call'
  actionpack (3.2.13) lib/action_dispatch/middleware/head.rb:14:in `call'
  actionpack (3.2.13) lib/action_dispatch/middleware/params_parser.rb:21:in `call'
  actionpack (3.2.13) lib/action_dispatch/middleware/flash.rb:242:in `call'
  rack (1.4.5) lib/rack/session/abstract/id.rb:210:in `context'
  rack (1.4.5) lib/rack/session/abstract/id.rb:205:in `call'
  actionpack (3.2.13) lib/action_dispatch/middleware/cookies.rb:341:in `call'
  activerecord (3.2.13) lib/active_record/query_cache.rb:64:in `call'
  activerecord (3.2.13) lib/active_record/connection_adapters/abstract/connection_pool.rb:479:in `call'
  actionpack (3.2.13) lib/action_dispatch/middleware/callbacks.rb:28:in `block in call'
  activesupport (3.2.13) lib/active_support/callbacks.rb:405:in `_run__281582452__call__871000944__callbacks'
  activesupport (3.2.13) lib/active_support/callbacks.rb:405:in `__run_callback'
  activesupport (3.2.13) lib/active_support/callbacks.rb:385:in `_run_call_callbacks'
  activesupport (3.2.13) lib/active_support/callbacks.rb:81:in `run_callbacks'
  actionpack (3.2.13) lib/action_dispatch/middleware/callbacks.rb:27:in `call'
  actionpack (3.2.13) lib/action_dispatch/middleware/reloader.rb:65:in `call'
  actionpack (3.2.13) lib/action_dispatch/middleware/remote_ip.rb:31:in `call'
  better_errors (1.0.1) lib/better_errors/middleware.rb:84:in `protected_app_call'
  better_errors (1.0.1) lib/better_errors/middleware.rb:79:in `better_errors_call'
  better_errors (1.0.1) lib/better_errors/middleware.rb:56:in `call'
  actionpack (3.2.13) lib/action_dispatch/middleware/debug_exceptions.rb:16:in `call'
  actionpack (3.2.13) lib/action_dispatch/middleware/show_exceptions.rb:56:in `call'
  railties (3.2.13) lib/rails/rack/logger.rb:32:in `call_app'
  railties (3.2.13) lib/rails/rack/logger.rb:16:in `block in call'
  activesupport (3.2.13) lib/active_support/tagged_logging.rb:22:in `tagged'
  railties (3.2.13) lib/rails/rack/logger.rb:16:in `call'
  quiet_assets (1.0.2) lib/quiet_assets.rb:18:in `call_with_quiet_assets'
  actionpack (3.2.13) lib/action_dispatch/middleware/request_id.rb:22:in `call'
  rack (1.4.5) lib/rack/methodoverride.rb:21:in `call'
  rack (1.4.5) lib/rack/runtime.rb:17:in `call'
  activesupport (3.2.13) lib/active_support/cache/strategy/local_cache.rb:72:in `call'
  rack (1.4.5) lib/rack/lock.rb:15:in `call'
  actionpack (3.2.13) lib/action_dispatch/middleware/static.rb:63:in `call'
  railties (3.2.13) lib/rails/engine.rb:479:in `call'
  railties (3.2.13) lib/rails/application.rb:223:in `call'
  rack (1.4.5) lib/rack/content_length.rb:14:in `call'
  railties (3.2.13) lib/rails/rack/log_tailer.rb:17:in `call'
  thin (1.5.1) lib/thin/connection.rb:81:in `block in pre_process'
  thin (1.5.1) lib/thin/connection.rb:79:in `pre_process'
  thin (1.5.1) lib/thin/connection.rb:54:in `process'
  thin (1.5.1) lib/thin/connection.rb:39:in `receive_data'
  eventmachine (1.0.3) lib/eventmachine.rb:187:in `run'
  thin (1.5.1) lib/thin/backends/base.rb:63:in `start'
  thin (1.5.1) lib/thin/server.rb:159:in `start'
  rack (1.4.5) lib/rack/handler/thin.rb:13:in `run'
  rack (1.4.5) lib/rack/server.rb:268:in `start'
  railties (3.2.13) lib/rails/commands/server.rb:70:in `start'
  railties (3.2.13) lib/rails/commands.rb:55:in `block in <top (required)>'
  railties (3.2.13) lib/rails/commands.rb:50:in `<top (required)>'

解决方案：

将 before_save 更改为 after_create

并使用了这条线

self.update_attribute(:status, false)
4

2 回答 2

1

您有User模型并且status- 是用户实例属性

你可以改变

self.status = false

到

update_attribute(:status, false)

然后你可以在你的业务逻辑中使用这个标志..

（但显然你必须status在数据库的用户表中有一个字段）

于 2013-10-10T07:46:02.410 回答
0

这个问题是由回调引起的：http: //api.rubyonrails.org/classes/ActiveRecord/Callbacks.html。尤其是这些行很重要：

如果 before_* 回调返回 false，则所有后面的回调和相关操作都将被取消。如果 after_* 回调返回 false，则后面的所有回调都将被取消。回调通常按照定义的顺序运行，但定义为模型上的方法的回调除外，这些方法最后调用。

而且您正在使用回调，它总是返回 false 并破坏进一步的操作：

def limited_sign_up_inactive
  @allowed_emails = LimitedSignup.pluck(:email)
  unless @allowed_emails.include? self.email
    self.status = false   #getting error  in this line
  end
end

这不是设计问题，为了避免它只需在回调函数的末尾添加“true”：

def limited_sign_up_inactive
  @allowed_emails = LimitedSignup.pluck(:email)
  unless @allowed_emails.include? self.email
    self.status = false   #getting error  in this line
  end
  true
end

谢谢，亚历克斯。

于 2014-11-13T14:28:22.767 回答