设计注册 - 如何保存一个属性，而不需要一个表单字段（Rails4，devise） [英] Devise sign up - how to save an attribute without having a form field for it (Rails4, devise)

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问题描述

我有一个Rails应用程序并实现了地理位置定位：使用geocoder gem，我检测到ip并且知道用户正在从哪个国家访问页面。

I have a Rails app and have implemented geolocalization: with geocoder gem, I detect the ip and know which country the user is accessing pages from.

喜欢在用户表中添加country属性。

I'd like to add a 'country' attribute to the User table.

用户将来到注册页面，而不知道我会检测到，例如他们正在访问来自芬兰的应用程序。

Users would come to the sign-up page and without them knowing I would detect for example they are accessing the app from Finland.

然后，当他们通过填写2个字段来注册电子邮件&密码，我会保存电子邮件和密码，但我想保存/存储我在这个列'国家'使用geocoder的国家。

Then when they sign up in by filling in the 2 fields email & password, I would save email and password but I want to save/store the country I get using geocoder in this column 'country'.

我如何保存这个国家'属性，如果我没有表单中的字段？

How can I save this 'country' attribute if I don't have the field in the form ?

听起来很容易，但我只知道如何保存值，当实际上有一个表单字段用户填写

Sounds easy but I only know how to save values when there actually is a form field the user fills in.

这里我做了什么：

/app/controllers/confirmations_controller.rb

/app/controllers/confirmations_controller.rb

def after_sign_up_path_for(resource)
    if Devise.allow_insecure_sign_in_after_confirmation
      resource.update(user_country: request.location.country)
      after_sign_in_path_for(resource)      
    else
       resource.update(user_country: request.location.country)
       root_path
    end    
  end

奇怪的是，用户在本地数据库上保存的一切都很好（包括位置）。但是，随着我收到一个错误页面，并出现以下错误信息，但是有一些事情必须发生：

What's weird is that the user is saved with everything fine (including location) on my local database. But then something must happen as I get an error page with the following error message:

undefined method `model_name' for TrueClass:Class

整个错误日志

(0.8ms)  COMMIT
   (0.5ms)  BEGIN
  SQL (1.3ms)  UPDATE "users" SET "remember_created_at" = $1, "updated_at" = $2 WHERE "users"."id" = 427  [["remember_created_at", 2014-06-24 10:52:32 UTC], ["updated_at", 2014-06-24 12:52:32 +0200]]
   (0.7ms)  COMMIT
   (0.4ms)  BEGIN
  SQL (0.9ms)  UPDATE "users" SET "last_sign_in_at" = $1, "current_sign_in_at" = $2, "last_sign_in_ip" = $3, "current_sign_in_ip" = $4, "sign_in_count" = $5, "updated_at" = $6 WHERE "users"."id" = 427  [["last_sign_in_at", 2014-06-24 10:52:32 UTC], ["current_sign_in_at", 2014-06-24 10:52:32 UTC], ["last_sign_in_ip", "24.193.83.1"], ["current_sign_in_ip", "24.193.83.1"], ["sign_in_count", 1], ["updated_at", 2014-06-24 12:52:32 +0200]]
   (0.7ms)  COMMIT
   (0.4ms)  BEGIN
  User Exists (1.0ms)  SELECT 1 AS one FROM "users" WHERE (LOWER("users"."email") = LOWER('mathieu.proffit75++edaaaaaa+++@gmail.com') AND "users"."id" != 427) LIMIT 1
  SQL (1.3ms)  UPDATE "users" SET "user_country" = $1, "updated_at" = $2 WHERE "users"."id" = 427  [["user_country", "United States"], ["updated_at", 2014-06-24 12:52:32 +0200]]
   (0.7ms)  COMMIT
Completed 500 Internal Server Error in 4984ms

NoMethodError - undefined method `model_name' for TrueClass:Class:
  actionpack (4.0.5) lib/action_controller/model_naming.rb:9:in `model_name_from_record_or_class'
  actionpack (4.0.5) lib/action_dispatch/routing/polymorphic_routes.rb:182:in `build_named_route_call'
  actionpack (4.0.5) lib/action_dispatch/routing/polymorphic_routes.rb:120:in `polymorphic_url'
  actionpack (4.0.5) lib/action_dispatch/routing/url_for.rb:159:in `url_for'
  actionpack (4.0.5) lib/action_controller/metal/rendering.rb:68:in `_process_options'
  actionpack (4.0.5) lib/action_controller/metal/streaming.rb:202:in `_process_options'
  actionpack (4.0.5) lib/abstract_controller/rendering.rb:119:in `render_to_body'
  actionpack (4.0.5) lib/action_controller/metal/rendering.rb:33:in `render_to_body'
  actionpack (4.0.5) lib/action_controller/metal/renderers.rb:26:in `render_to_body'
  actionpack (4.0.5) lib/abstract_controller/rendering.rb:97:in `render'
  actionpack (4.0.5) lib/action_controller/metal/rendering.rb:16:in `render'
  actionpack (4.0.5) lib/action_controller/metal/instrumentation.rb:41:in `block (2 levels) in render'
  activesupport (4.0.5) lib/active_support/core_ext/benchmark.rb:12:in `block in ms'
  /home/mreisner/.rvm/rubies/ruby-2.0.0-p451/lib/ruby/2.0.0/benchmark.rb:296:in `realtime'
  activesupport (4.0.5) lib/active_support/core_ext/benchmark.rb:12:in `ms'
  actionpack (4.0.5) lib/action_controller/metal/instrumentation.rb:41:in `block in render'
  actionpack (4.0.5) lib/action_controller/metal/instrumentation.rb:84:in `cleanup_view_runtime'
  activerecord (4.0.5) lib/active_record/railties/controller_runtime.rb:25:in `cleanup_view_runtime'
  actionpack (4.0.5) lib/action_controller/metal/instrumentation.rb:40:in `render'
  actionpack (4.0.5) lib/action_controller/metal/implicit_render.rb:10:in `default_render'
  actionpack (4.0.5) lib/action_controller/metal/responder.rb:233:in `default_render'
  actionpack (4.0.5) lib/action_controller/metal/responder.rb:161:in `to_html'
  actionpack (4.0.5) lib/action_controller/metal/responder.rb:154:in `respond'
  actionpack (4.0.5) lib/action_controller/metal/responder.rb:147:in `call'
  actionpack (4.0.5) lib/action_controller/metal/mime_responds.rb:330:in `respond_with'
  devise (3.2.4) app/controllers/devise/registrations_controller.rb:20:in `create'
  actionpack (4.0.5) lib/action_controller/metal/implicit_render.rb:4:in `send_action'
  actionpack (4.0.5) lib/abstract_controller/base.rb:189:in `process_action'
  actionpack (4.0.5) lib/action_controller/metal/rendering.rb:10:in `process_action'
  actionpack (4.0.5) lib/abstract_controller/callbacks.rb:18:in `block in process_action'
  activesupport (4.0.5) lib/active_support/callbacks.rb:483:in `_run__1192109421260337467__process_action__callbacks'
  activesupport (4.0.5) lib/active_support/callbacks.rb:80:in `run_callbacks'
  actionpack (4.0.5) lib/abstract_controller/callbacks.rb:17:in `process_action'
  actionpack (4.0.5) lib/action_controller/metal/rescue.rb:29:in `process_action'
  actionpack (4.0.5) lib/action_controller/metal/instrumentation.rb:31:in `block in process_action'
  activesupport (4.0.5) lib/active_support/notifications.rb:159:in `block in instrument'
  activesupport (4.0.5) lib/active_support/notifications/instrumenter.rb:20:in `instrument'
  activesupport (4.0.5) lib/active_support/notifications.rb:159:in `instrument'
  actionpack (4.0.5) lib/action_controller/metal/instrumentation.rb:30:in `process_action'
  actionpack (4.0.5) lib/action_controller/metal/params_wrapper.rb:250:in `process_action'
  activerecord (4.0.5) lib/active_record/railties/controller_runtime.rb:18:in `process_action'
  actionpack (4.0.5) lib/abstract_controller/base.rb:136:in `process'
  actionpack (4.0.5) lib/abstract_controller/rendering.rb:44:in `process'
  actionpack (4.0.5) lib/action_controller/metal.rb:195:in `dispatch'
  actionpack (4.0.5) lib/action_controller/metal/rack_delegation.rb:13:in `dispatch'
  actionpack (4.0.5) lib/action_controller/metal.rb:231:in `block in action'
  actionpack (4.0.5) lib/action_dispatch/routing/route_set.rb:80:in `call'
  actionpack (4.0.5) lib/action_dispatch/routing/route_set.rb:80:in `dispatch'
  actionpack (4.0.5) lib/action_dispatch/routing/route_set.rb:48:in `call'
  actionpack (4.0.5) lib/action_dispatch/routing/mapper.rb:44:in `call'
  actionpack (4.0.5) lib/action_dispatch/journey/router.rb:71:in `block in call'
  actionpack (4.0.5) lib/action_dispatch/journey/router.rb:59:in `each'
  actionpack (4.0.5) lib/action_dispatch/journey/router.rb:59:in `call'
  actionpack (4.0.5) lib/action_dispatch/routing/route_set.rb:674: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 `catch'
  warden (1.2.3) lib/warden/manager.rb:34:in `call'
  rack (1.5.2) lib/rack/etag.rb:23:in `call'
  rack (1.5.2) lib/rack/conditionalget.rb:35:in `call'
  rack (1.5.2) lib/rack/head.rb:11:in `call'
  actionpack (4.0.5) lib/action_dispatch/middleware/params_parser.rb:27:in `call'
  actionpack (4.0.5) lib/action_dispatch/middleware/flash.rb:241:in `call'
  rack (1.5.2) lib/rack/session/abstract/id.rb:225:in `context'
  rack (1.5.2) lib/rack/session/abstract/id.rb:220:in `call'
  actionpack (4.0.5) lib/action_dispatch/middleware/cookies.rb:486:in `call'
  activerecord (4.0.5) lib/active_record/query_cache.rb:36:in `call'
  activerecord (4.0.5) lib/active_record/connection_adapters/abstract/connection_pool.rb:626:in `call'
  activerecord (4.0.5) lib/active_record/migration.rb:373:in `call'
  actionpack (4.0.5) lib/action_dispatch/middleware/callbacks.rb:29:in `block in call'
  activesupport (4.0.5) lib/active_support/callbacks.rb:373:in `_run__3240580690818246217__call__callbacks'
  activesupport (4.0.5) lib/active_support/callbacks.rb:80:in `run_callbacks'
  actionpack (4.0.5) lib/action_dispatch/middleware/callbacks.rb:27:in `call'
  actionpack (4.0.5) lib/action_dispatch/middleware/reloader.rb:64:in `call'
  actionpack (4.0.5) lib/action_dispatch/middleware/remote_ip.rb:76:in `call'
  better_errors (1.1.0) lib/better_errors/middleware.rb:84:in `protected_app_call'
  better_errors (1.1.0) lib/better_errors/middleware.rb:79:in `better_errors_call'
  better_errors (1.1.0) lib/better_errors/middleware.rb:56:in `call'
  actionpack (4.0.5) lib/action_dispatch/middleware/debug_exceptions.rb:17:in `call'
  actionpack (4.0.5) lib/action_dispatch/middleware/show_exceptions.rb:30:in `call'
  railties (4.0.5) lib/rails/rack/logger.rb:38:in `call_app'
  railties (4.0.5) lib/rails/rack/logger.rb:20:in `block in call'
  activesupport (4.0.5) lib/active_support/tagged_logging.rb:68:in `block in tagged'
  activesupport (4.0.5) lib/active_support/tagged_logging.rb:26:in `tagged'
  activesupport (4.0.5) lib/active_support/tagged_logging.rb:68:in `tagged'
  railties (4.0.5) lib/rails/rack/logger.rb:20:in `call'
  quiet_assets (1.0.2) lib/quiet_assets.rb:18:in `call_with_quiet_assets'
  actionpack (4.0.5) lib/action_dispatch/middleware/request_id.rb:21:in `call'
  rack (1.5.2) lib/rack/methodoverride.rb:21:in `call'
  rack (1.5.2) lib/rack/runtime.rb:17:in `call'
  activesupport (4.0.5) lib/active_support/cache/strategy/local_cache.rb:83:in `call'
  rack (1.5.2) lib/rack/lock.rb:17:in `call'
  rack (1.5.2) lib/rack/sendfile.rb:112:in `call'
  railties (4.0.5) lib/rails/engine.rb:511:in `call'
  railties (4.0.5) lib/rails/application.rb:97:in `call'
  rack (1.5.2) lib/rack/lock.rb:17:in `call'
  rack (1.5.2) lib/rack/content_length.rb:14:in `call'
  rack (1.5.2) lib/rack/handler/webrick.rb:60:in `service'
  /home/mreisner/.rvm/rubies/ruby-2.0.0-p451/lib/ruby/2.0.0/webrick/httpserver.rb:138:in `service'
  /home/mreisner/.rvm/rubies/ruby-2.0.0-p451/lib/ruby/2.0.0/webrick/httpserver.rb:94:in `run'
  /home/mreisner/.rvm/rubies/ruby-2.0.0-p451/lib/ruby/2.0.0/webrick/server.rb:295:in `block in start_thread'


推荐答案

我可能会在注册后试图赶上用户。您可以在文档中阅读有关如何执行此操作的更多信息设计：注册后如何重定向

I'd probably try to catch the user after they sign up. You can read more on how to do it in the docs Devise: How to Redirect after Registration

使用类似的方式覆盖设计注册控制器这个：

Override the Devise Registration Controller with something like this:

class RegistrationsController < Devise::RegistrationsController
  protected

  def after_sign_up_path_for(resource)
    resource.update(location: request.location)
    root_path
  end
end

这是未经测试的代码，但应该让您走向正确的方向。该方法的第二行在注册后返回重定向到 root_path ，您可能需要更改。

That is untested code but should get you in the right direction. The second line of the method returns a redirect to the root_path after signup which you might want to change.

这篇关于设计注册 - 如何保存一个属性，而不需要一个表单字段（Rails4，devise）的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！

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