为什么x-editable-rails gem抛出一个错误：未定义的方法`xeditable？’？

我安装了gem x-editable for rails：

# x-editable gem 'x-editable-rails' 

我添加了xeditable?的方法xeditable? 到ActionController ：

  # Add a helper method to your controllers to indicate if x-editable should be enabled. def xeditable? true # Or something like current_user.xeditable? end 

但仍然出现错误：

 ActionView::Template::Error (undefined method `xeditable?' for #<#:0x007f9012ee9e78>): 14: 15: .panel-body 16: /a.doc_title.editable id='doc_title_12345' data-name="doc[title]" data-title="Enter doc title" data-type="text" data-url='/docs/12345' href='#doc_title_12345' = doc.title 17: = editable doc, :title 18: app/views/docs/_single_doc_in_accordion.html.slim:17:in `_app_views_docs__single_doc_in_accordion_html_slim__2506304306156466629_70128411437560' app/views/docs/index.html.slim:52:in `_app_views_docs_index_html_slim___3263534966956214695_70128384677640' 

我应该在哪里定义xeditable?方法xeditable? 它开始工作？

更新：

这是application_controller.rb ：

 class ApplicationController < ActionController::Base # Prevent CSRF attacks by raising an exception. # For APIs, you may want to use :null_session instead. protect_from_forgery with: :exception end 

这是application_helper.rb ：

 module ApplicationHelper # Add a helper method to your controllers to indicate if x-editable should be enabled. def xeditable? true # Or something like current_user.xeditable? end end 

现在我收到了新的错误：与xeditable?相同xeditable? ，但can? （方法未定义）

Answer 1

添加helper_method :xeditable? 在ApplicationController.rb ：

 class ApplicationController < ActionController::Base helper_method :xeditable? # Prevent CSRF attacks by raising an exception. # For APIs, you may want to use :null_session instead. protect_from_forgery with: :exception # Add a helper method to your controllers to indicate if x-editable should be enabled. def xeditable? true # Or something like current_user.xeditable? end end