undefined局部变量或方法`user_params’trail 4

所以我按照“从头开始validation”的轨道进行操作 – http://railscasts.com/episodes/250-authentication-from-scratch

我知道rails 4不使用attr_accessible。 我在我的用户控制器中将user_params定义为私有方法。 出于某种原因，rails为用户参数提供了一个未定义的错误。 我正在开发另一个rails app，我检查了它中的post控制器。 除了工作之外，它完全一样。 知道这里的问题是什么吗？

users_controller.rb

class UsersController  "Signed up!" else render "new" end private def user_params params.require(:user).permit(:email, :password, :password_confirmation) end 

错误消息：未定义的局部变量或方法`user_params’for＃

全栈跟踪：

app / controllers / users_controller.rb：7：在create' actionpack (4.1.1) lib/action_controller/metal/implicit_render.rb:4:in send_action’actionpack（4.1.1）lib / abstract_controller / base.rb：189： in process_action' actionpack (4.1.1) lib/action_controller/metal/rendering.rb:10:in process_action’actionpack（4.1.1）lib / abstract_controller / callbacks.rb：20：in block in process_action' activesupport (4.1.1) lib/active_support/callbacks.rb:113:in调用’activesupport（4.1.1）lib / active_support / callbacks.rb：113：在call' activesupport (4.1.1) lib/active_support/callbacks.rb:229:in块停止’activesupport（4.1.1）lib / active_support / callbacks.rb：229：在call' activesupport (4.1.1) lib/active_support/callbacks.rb:229:in块中停止’activesupport（4.1.1） lib / active_support / callbacks.rb：166：在call' activesupport (4.1.1) lib/active_support/callbacks.rb:166:in块中停止’activesupport（4.1.1）lib / active_support / callbacks.rb：166：在call' activesupport (4.1.1) lib/active_support/callbacks.rb:166:in call' activesupport (4.1.1) lib/active_support/callbacks.rb:166:in暂停’activesupport（4.1.1）lib / active_support / callbacks.rb的块中：166：在call' activesupport (4.1.1) lib/active_support/callbacks.rb:166:in块中停止’activesupport （4.1.1）lib / active_support / callbacks.rb：86：在call' activesupport (4.1.1) lib/active_support/callbacks.rb:86:in run_callbacks’actionpack（4.1.1）中lib / abstract_controller / callbacks.rb ：19：在process_action' actionpack (4.1.1) lib/action_controller/metal/rescue.rb:29:in process_action’actionpack（4.1.1）lib / action_controller / metal / instrumentation.rb：31：in process block in process_action' activesupport (4.1.1) lib/active_support/notifications.rb:159:in 1515 block in process_action' activesupport (4.1.1) lib/active_support/notifications.rb:159:in仪器’activesupport（4.1.1） block in process_action' activesupport (4.1.1) lib/active_support/notifications.rb:159:in块中lib / active_support / notifications / instrumenter.rb：20：在instrument' activesupport (4.1.1) lib/active_support/notifications.rb:159:in instrument’actionpack（4.1.1）lib / action_controller / metal / instrumentation.rb：30：in process_action' actionpack (4.1.1) lib/action_controller/metal/params_wrapper.rb:250:in process_action’acti中 verecord（4.1.1）lib / active_record / railties / controller_runtime.rb：18：在process_action' actionpack (4.1.1) lib/abstract_controller/base.rb:136:in进程中’actionview（4.1.1）lib / action_view / rendering.rb：30： process' actionpack (4.1.1) lib/action_controller/metal.rb:195:in dispatch’actionpack（4.1.1）lib / action_controller / metal / rack_delegation.rb：13：in dispatch' actionpack (4.1.1) lib/action_controller/metal.rb:231:in block in action’actionpack（4.1.1）lib / action_dispatch / routing / route_set.rb:80:in call’actionpack call' actionpack (4.1.1) lib/action_dispatch/routing/route_set.rb:80:in dispatch’actionpack（4.1.1）lib / action_dispatch / routing / route_set.rb:48:in call’actionpack call' actionpack (4.1.1) lib/action_dispatch/journey/router.rb:71:in块中调用’actionpack（4.1.1）lib / action_dispatch / journey / router.rb：59：在each' actionpack (4.1.1) lib/action_dispatch/journey/router.rb:59:in （ 4.1.1）lib / action_dispatch / routing / route_set.rb：676：在call' rack (1.5.2) lib/rack/etag.rb:23:in呼叫’机架中（1。 5.2）lib / rack / conditionalget.rb：35：在call' rack (1.5.2) lib/rack/head.rb:11:in调用’actionpack（4.1.1）lib / action_dispatch / middleware / params_parser.rb： 27：在call' actionpack (4.1.1) lib/action_dispatch/middleware/flash.rb:254:in调用’rack（1.5.2）lib / rack / session / abstract / id.rb：225：在context' rack (1.5.2) lib/rack/session/abstract/id.rb:220:in调用’actionpack（4.1.1）lib / action_dispatch / middleware / cookies.rb：560：在call' activerecord (4.1.1) lib/active_record/query_cache.rb:36:in调用’activerecord（4.1.1）lib / active_record / connection_adapters / abstract / connection_pool.rb：621：在call' activerecord (4.1.1) lib/active_record/migration.rb:380:in调用’actionpack（4.1.1）lib / action_dispatch / middleware / callbacks.rb：29： block in call' activesupport (4.1.1) lib/active_support/callbacks.rb:82:in run_callbacks’actionpack（4.1。 1）lib / action_dispatch / middleware / callbacks.rb：27：在call' actionpack (4.1.1) lib/action_dispatch/middleware/reloader.rb:73:in调用’actionpack（4.1.1）lib / action_d ispatch / middleware / remote_ip.rb:76：在call' actionpack (4.1.1) lib/action_dispatch/middleware/debug_exceptions.rb:17:in调用’actionpack（4.1.1）lib / action_dispatch / middleware / show_exceptions.rb： 30：在call' railties (4.1.1) lib/rails/rack/logger.rb:38:in call_app’railties（4.1.1）lib / rails / rack / logger.rb：20：在block in call' activesupport (4.1.1) lib/active_support/tagged_logging.rb:68:in标记的’activesupport（4.1.1）lib / active_support / tagged_logging.rb block in call' activesupport (4.1.1) lib/active_support/tagged_logging.rb:68:in块中：26：在tagged' activesupport (4.1.1) lib/active_support/tagged_logging.rb:68:in标记的’railties（4.1.1）lib / rails / rack / logger.rb：20：在call' actionpack (4.1.1) lib/action_dispatch/middleware/request_id.rb:21:in call’ rack（1.5.2）lib / rack / methodoverride.rb：21：在call' rack (1.5.2) lib/rack/runtime.rb:17:in调用’activesupport（4.1.1）lib / active_support / cache / strategy / local_cache_middleware.rb：26：在call' rack (1.5.2) lib/rack/lock.rb:17:in调用’actionpack（4.1.1）lib / action_dispatch / middleware / static.rb：64：正在call' rack (1.5.2) lib/rack/sendfile.rb:112:in call' rack (1.5.2) lib/rack/sendfile.rb:112:in调用’railties（4.1.1）lib / rails / engine.rb：514：在call' railties (4.1.1) lib/rails/application.rb:144:in呼叫’机架（1.5.2）lib / rack / lock.rb：17：在call' rack (1.5.2) lib/rack/content_length.rb:14:in呼叫’机架（1.5.2）lib / rack / handler / webrick.rb:60:in service’/home/rick/.rvm/rubies/ruby-2.1.1/lib/ruby/2.1.0/webrick/httpserver.rb:138: service' /home/rick/.rvm/rubies/ruby-2.1.1/lib/ruby/2.1.0/webrick/httpserver.rb:138:in service’/ home /rick/.rvm/rubies/ruby-2.1.1/lib/ruby/2.1.0/webrick/httpserver.rb:94:in run' /home/rick/.rvm/rubies/ruby-2.1.1/lib/ruby/2.1.0/webrick/server.rb:295:in块’

Answer 1

数数你的end 。 你的代码应该是这样的：

 class UsersController < ApplicationController def new @user = User.new end def create @user = User.create(user_params) if @user.save redirect_to root_url, :notice => "Signed up!" else render "new" end end private def user_params params.require(:user).permit(:email, :password, :password_confirmation) end end 

Answer 2

如果这是直接代码粘贴，那么看起来你的private和def user_params嵌套在你的create动作中。 即缩进是时髦的，所以很难说，但结果当前语法不正确。 记住缩进！