未初始化的常量 ActiveSupport::CoreExtensions [英] uninitialized constant ActiveSupport::CoreExtensions

问题描述

我正在尝试将 jquery 的 datepicker 与 formtastic 详细集成 这里

我完全按照说明操作，但是在运行此代码时出现未初始化的常量 ActiveSupport::CoreExtensions":

<%= semantic_form_for @item, :html =>{ :multipart =>真，:class =>'形式'} 做 |f|％＞<div class="group"><%= f.label :create_date, :class =>'标签'%><%= f.input :create_date, :as =>:日期选择器 %>

<%结束%>

我试图把它放在我的 config/application.rb 中:

需要'active_support/core_ext/date/conversions'

我已重新启动服务器，但仍然遇到相同的错误.我是否将这个 require 行放在正确的位置?

解决方案

检查您链接的页面，我认为问题在于以下行:

format = options[:format] ||ActiveSupport::CoreExtensions::Date::Conversions::DATE_FORMATS[:default] ||%d %b %Y"

查看您提到的 文件，看来Rails现在直接修改了Date类，而不是定义ActiveSupport::CoreExtensions::Date；此外，将 :default 作为键传递给 DATE_FORMATS 似乎只是在对象上调用 to_default_s .解决这个问题的最简单方法可能是删除对 ActiveSupport::CoreExtensions 的整个引用，因为代码还指定了一个默认值:

format = options[:format] ||%d %b %Y"

您还可以指定 Rails 在 conversions.rb 中添加的日期格式之一:

format = options[:format] ||日期::DATE_FORMATS[:rfc822] ||%d %b %Y"

I'm attempting to integrate jquery's datepicker with formtastic as detailed here

I've followed the directions exactly, but am getting "uninitialized constant ActiveSupport::CoreExtensions" when running this code:

<%= semantic_form_for @item, :html => { :multipart => true, :class => 'form'} do |f| %>
 <div class="group">
  <%= f.label :create_date, :class => 'label' %>
  <%= f.input :create_date, :as => :datepicker %>
 </div>
<% end %>

I attempted to put this in my config/application.rb:

require 'active_support/core_ext/date/conversions'

I've restarted the server but am still getting the same error. Am I putting this require line in the correct place?

解决方案

Checking the page you linked, I assume the problem is the following line:

format = options[:format] || ActiveSupport::CoreExtensions::Date::Conversions::DATE_FORMATS[:default] || '%d %b %Y'

Looking at the file you mentioned, it appears that Rails now modifies the Date class directly rather than defining ActiveSupport::CoreExtensions::Date; furthermore, passing :default as the key to DATE_FORMATS appears to just call to_default_s on the object. The easiest way to deal with this would probably be to remove the whole reference to ActiveSupport::CoreExtensions, since the code also specifies a default:

format = options[:format] || '%d %b %Y'

You could also specify one of the date formats Rails adds in conversions.rb as so:

format = options[:format] || Date::DATE_FORMATS[:rfc822] || '%d %b %Y'

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