未初始化的常量Moped :: BSON在Heroku上的rails 4应用程序中 [英] uninitialized constant Moped::BSON in rails 4 app on heroku

问题描述

 <$ c $我从本地更新了rails 3到rails 4。 c> ActionView :: Template :: Error（未初始化的常量Moped :: BSON）：
 3：％nav.navbar-collapse 
 4：％ul.nav 
 5：％li 
 6： - 如果user_signed_in？ 
 7：= link_to'注销'，destroy_user_session_path，：method =>'删除'
 8： -  else 
 9：= link_to'Login'，new_user_session_path 
 app / views /layouts/navigation.html.haml:6:in`_app_views_layouts__navigation_html_haml___1118031947301940708_70104067139880'
 app / views / layouts / application.html.haml：18：in _app_views_layouts_application_html_haml__1093647294459268715_70104069850820'
  

当我访问current_user
- 如果current_user
...

时，其他haml文件中会出现同样的错误

解决方案

以下工作适用于我：

添加到Gemfile：

  gembson
 gemmoped，github：mongoid / moped
  

捆绑安装

添加到application.rb：

 要求bson
要求moped
 Moped :: BSON = BSON 
  

回答：
< a href =https://github.com/mongoid/mongoid/issues/3455> https://github.com/mongoid/mongoid/issues/3455

I just updated from rails 3 to rails 4. Everything works locally, but deployed on heroku, I get the following error:

ActionView::Template::Error (uninitialized constant Moped::BSON):
3: %nav.navbar-collapse
4:   %ul.nav
5:     %li
6:       - if user_signed_in?
7:         = link_to 'Logout', destroy_user_session_path, :method=>'delete'
8:       - else
9:         = link_to 'Login', new_user_session_path
app/views/layouts/_navigation.html.haml:6:in `_app_views_layouts__navigation_html_haml___1118031947301940708_70104067139880'
app/views/layouts/application.html.haml:18:in `_app_views_layouts_application_html_haml__1093647294459268715_70104069850820'

The same error occurs in other haml files when I access current_user - if current_user ...

解决方案

The following worked for me:

add to Gemfile:

gem "bson"
gem "moped", github: "mongoid/moped"

bundle install

add to application.rb:

require "bson"
require "moped"
Moped::BSON = BSON

Answer from: https://github.com/mongoid/mongoid/issues/3455

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