Question

所以我按照“从头开始验证” - http://railscasts.com/episodes/250-authentication-from-scratch

的轨道投射

据我所知，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给了我一个用户参数的未定义错误。我正在开发另一个rails应用程序，我检查了它中的post控制器。除了工作之外，它完全一样。知道问题在这里吗？

users_controller.rb

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
private

def user_params
  params.require(:user).permit(:email, :password, :password_confirmation)
 end

错误讯息：未定义的局部变量或方法`user_params'用于＃

完整堆栈跟踪：

app / controllers / users_controller.rb：7：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 call'activesupport（4.1.1） lib / active_support / callbacks.rb：113：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：229：在call' activesupport (4.1.1) lib/active_support/callbacks.rb:229:in块中暂停'activesupport（4.1.1）lib / active_support / callbacks.rb：166：in call' activesupport (4.1.1) lib/active_support/callbacks.rb:166:in阻止停止'activesupport（4.1.1） lib / active_support / callbacks.rb：166：在call' activesupport (4.1.1) lib/active_support/callbacks.rb:166:in块中暂停' activesupport（4.1.1）lib / active_support / callbacks.rb：166：在call' activesupport (4.1.1) lib/active_support/callbacks.rb:166:in块中暂停'activesupport（4.1.1）lib / active_support / callbacks.rb:86:in call' activesupport (4.1.1) lib/active_support/callbacks.rb:86:in run_callbacks'actionpack（4.1.1） lib / abstract_controller / callbacks.rb：19：在process_action' actionpack (4.1.1) lib/action_controller/metal/rescue.rb:29:in process_action'中 actionpack（4.1.1） lib / action_controller / metal / instrumentation.rb：31：在block in process_action' activesupport (4.1.1) lib/active_support/notifications.rb:159:in块中的乐器' activesupport（4.1.1） 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）中 lib / action_controller / metal / instrumentation.rb：30：在process_action' actionpack (4.1.1) lib/action_controller/metal/params_wrapper.rb:250:in process_action'中 activerecord（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'actionview（4.1.1） lib / action_view / rendering.rb：30：在process' actionpack (4.1.1) lib/action_controller/metal.rb:195:in dispatch'actionpack（4.1.1）中 lib / action_controller / metal / rack_delegation.rb：13：在dispatch' actionpack (4.1.1) lib/action_controller/metal.rb:231:in块中 action'actionpack（4.1.1） lib / action_dispatch / routing / route_set.rb:80:in 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 (4.1.1) lib/action_dispatch/journey/router.rb:71:in阻止调用'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调用'actionpack（4.1.1） lib / action_dispatch / routing / route_set.rb：676：在call' rack (1.5.2) lib/rack/etag.rb:23:in调用'机架（1.5.2） lib / rack / conditionalget.rb:35:in call' rack (1.5.2) lib/rack/head.rb:11:in call'actionpack（4.1.1） lib / action_dispatch / middleware / params_parser.rb:27:in call' actionpack (4.1.1) lib/action_dispatch/middleware/flash.rb:254: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 （4.1.1）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 /抽象/ 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：在block in call' activesupport (4.1.1) lib/active_support/callbacks.rb:82:in run_callbacks'actionpack（4.1.1）中 lib / action_dispatch / middleware / callbacks.rb:27:in call' actionpack (4.1.1) lib/action_dispatch/middleware/reloader.rb:73:in call' actionpack（4.1.1）lib / action_dispatch / middleware / remote_ip.rb:76:in call' actionpack (4.1.1) lib/action_dispatch/middleware/debug_exceptions.rb:17:in称之为” actionpack（4.1.1） lib / action_dispatch / middleware / show_exceptions.rb:30:in 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块中标记为' activesupport（4.1.1）lib / active_support / tagged_logging.rb:26:in tagged' activesupport (4.1.1) lib/active_support/tagged_logging.rb:68:in标记为'railties（4.1.1） lib / rails / rack / logger.rb:20:in 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）中 LIB / active_support /缓存/策略/ 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:in call' rack (1.5.2) lib/rack/sendfile.rb:112:in call'railties（4.1.1） lib / rails / engine.rb：514：在call' railties (4.1.1) lib/rails/application.rb:144:in调用'机架（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/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 {_ 1}}阻止在start_thread'
中

Answer 1

计算您的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，那么您的private和def user_params似乎嵌套在create操作中。即缩进很时髦，所以很难说，但结果当前语法不正确。记住缩进！

未定义的局部变量或方法`user_params＆＃39;铁轨4

2 个答案: