错误“未初始化的常量Rails :: Engine（NameError）”

我想加入一个Rails项目。这个项目使用rails 2.3.8和Ruby 1.8.7，所以我使用RVM。我也在使用gem v1.3.7错误“未初始化的常量Rails :: Engine（NameError）”

当我启动服务器时，一切正常。但后来，当我通过我的浏览器访问它，它崩溃，我得到了以下跟踪：

/Users/ca/.rvm/gems/ruby-1.8.7-p334/gems/activesupport-2.3.8/lib/active_support/dependencies.rb:440:in `load_missing_constant': uninitialized constant Rails::Engine (NameError) 
     from /Users/ca/.rvm/gems/ruby-1.8.7-p334/gems/activesupport-2.3.8/lib/active_support/dependencies.rb:80:in `const_missing' 
     from /Users/ca/.rvm/gems/ruby-1.8.7-p334/gems/devise_invitable-0.3.6/lib/devise_invitable/rails.rb:2 
     from /Users/ca/.rvm/rubies/ruby-1.8.7-p334/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in `gem_original_require' 
     from /Users/ca/.rvm/rubies/ruby-1.8.7-p334/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in `require' 
     from /Users/ca/.rvm/gems/ruby-1.8.7-p334/gems/activesupport-2.3.8/lib/active_support/dependencies.rb:156:in `require' 
     from /Users/ca/.rvm/gems/ruby-1.8.7-p334/gems/activesupport-2.3.8/lib/active_support/dependencies.rb:521:in `new_constants_in' 
     from /Users/ca/.rvm/gems/ruby-1.8.7-p334/gems/activesupport-2.3.8/lib/active_support/dependencies.rb:156:in `require' 
     from /Users/ca/.rvm/gems/ruby-1.8.7-p334/gems/devise_invitable-0.3.6/lib/devise_invitable.rb:16 
     from /Users/ca/.rvm/rubies/ruby-1.8.7-p334/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in `gem_original_require' 
     from /Users/ca/.rvm/rubies/ruby-1.8.7-p334/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in `require' 
     from /Users/ca/.rvm/gems/ruby-1.8.7-p334/gems/activesupport-2.3.8/lib/active_support/dependencies.rb:156:in `require' 
     from /Users/ca/.rvm/gems/ruby-1.8.7-p334/gems/activesupport-2.3.8/lib/active_support/dependencies.rb:521:in `new_constants_in' 
     from /Users/ca/.rvm/gems/ruby-1.8.7-p334/gems/activesupport-2.3.8/lib/active_support/dependencies.rb:156:in `require' 
     from /Users/ca/.rvm/gems/ruby-1.8.7-p334/gems/rails-2.3.8/lib/rails/gem_dependency.rb:215:in `load' 
     from /Users/ca/.rvm/gems/ruby-1.8.7-p334/gems/rails-2.3.8/lib/initializer.rb:307:in `load_gems' 
     from /Users/ca/.rvm/gems/ruby-1.8.7-p334/gems/rails-2.3.8/lib/initializer.rb:307:in `each' 
     from /Users/ca/.rvm/gems/ruby-1.8.7-p334/gems/rails-2.3.8/lib/initializer.rb:307:in `load_gems' 
     from /Users/ca/.rvm/gems/ruby-1.8.7-p334/gems/rails-2.3.8/lib/initializer.rb:169:in `process' 
     from /Users/ca/.rvm/gems/ruby-1.8.7-p334/gems/rails-2.3.8/lib/initializer.rb:113:in `send' 
     from /Users/ca/.rvm/gems/ruby-1.8.7-p334/gems/rails-2.3.8/lib/initializer.rb:113:in `run' 
     from /Users/ca/Documents/Project/Sources/Project-test/config/environment.rb:9 
     from /Users/ca/.rvm/rubies/ruby-1.8.7-p334/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in `gem_original_require' 
     from /Users/ca/.rvm/rubies/ruby-1.8.7-p334/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in `require' 
     from /Users/ca/.rvm/gems/ruby-1.8.7-p334/gems/activesupport-2.3.8/lib/active_support/dependencies.rb:156:in `require' 
     from /Users/ca/.rvm/gems/ruby-1.8.7-p334/gems/activesupport-2.3.8/lib/active_support/dependencies.rb:521:in `new_constants_in' 
     from /Users/ca/.rvm/gems/ruby-1.8.7-p334/gems/activesupport-2.3.8/lib/active_support/dependencies.rb:156:in `require' 
     from /Users/ca/.rvm/gems/ruby-1.8.7-p334/gems/rails-2.3.8/lib/commands/server.rb:84 
     from /Users/ca/.rvm/rubies/ruby-1.8.7-p334/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in `gem_original_require' 
     from /Users/ca/.rvm/rubies/ruby-1.8.7-p334/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in `require' 
     from ./script/server:3

这里是我安装的宝石：

actionmailer (2.3.8) 
actionpack (2.3.8) 
activemodel (3.0.5) 
activerecord (2.3.8) 
activeresource (2.3.8) 
activesupport (3.0.5, 2.3.8) 
addressable (2.2.4) 
arel (2.0.9) 
aws (2.4.4) 
aws-s3 (0.6.2) 
bcrypt-ruby (2.1.4) 
builder (3.0.0, 2.1.2) 
client_side_validations (2.9.9) 
crack (0.1.8) 
daemons (1.1.0) 
dalli (1.0.2) 
delayed_job (2.0.3) 
devise (1.1.7) 
devise_invitable (0.3.6) 
faraday (0.5.7, 0.4.6) 
fb_graph (1.5.3) 
googlecharts (1.6.1) 
http_connection (1.4.0) 
httparty (0.7.4) 
i18n (0.5.0) 
json (1.5.1, 1.4.3) 
mime-types (1.16) 
multi_json (0.0.5) 
multipart-post (1.1.0) 
net-ldap (0.1.1) 
nokogiri (1.4.4) 
oa-basic (0.1.5) 
oa-core (0.1.5) 
oa-enterprise (0.1.5) 
oa-oauth (0.1.5) 
oa-openid (0.1.5) 
oauth (0.4.4) 
oauth2 (0.1.1, 0.0.13) 
omniauth (0.1.5) 
paperclip (2.3.8) 
pyu-ruby-sasl (0.0.3.2) 
rack (1.1.1) 
rack-openid (1.1.2) 
rails (2.3.8) 
rake (0.8.7) 
RedCloth (4.2.7) 
rest-client (1.6.1) 
ruby-openid (2.1.8) 
ruby-openid-apps-discovery (1.2.0) 
rubygems-update (1.3.7) 
rubyntlm (0.1.1) 
tzinfo (0.3.24) 
uuidtools (2.1.2) 
validates_timeliness (2.3.0) 
validation_reflection (0.3.7) 
validation_reflection-active_model (0.3.1) 
warden (1.0.3) 
will_paginate (2.3.15) 
xml-simple (1.0.14)

来自哪里的问题？

非常感谢您的帮助！

来源

2011-03-03 charlax

您的DeviseInvitable版本对于Rails 2.3来说太新了。

DeviseInvitable目前仅支持Rails 3中，如果你想使用Rails 2.3使用它，你必须安装版本0.2.3

正如设计1.1

支持Rails的2.3。 x可以通过从v1.0分支安装Devise 1.0.x来找到。

运行

gem uninstall devise devise_invitable 
gem install devise --version 1.0.10 
gem install devise_invitable --version 0.2.3

来源

2011-03-03 22:25:48

THX！现在我有未初始化的常量Rails :: Initializer :: ActiveMerchant（NameError）：（ – charlax 2011-03-03 22:31:08

）它甚至不像它的安装，你可能需要检查所有的gems是否兼容Rails 2.3，或者询问这个项目上的某个人应该使用什么版本，我还建议他们开始使用[Bundler]（http://gembundler.com），因为它减少了你现在看到的东西：[依赖地狱]（http ：//en.wikipedia.org/wiki/Dependancy_hell）。 – 2011-03-03 22:34:11

非常感谢Andrew！ – charlax 2011-03-03 22:38:23

错误“未初始化的常量Rails :: Engine（NameError）”

回答

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