Spree 的最新版本在远程未定义方法 `set_preference' for nil:NilClass 上执行此操作

Question

一切都在我的本地完美运行。我在服务器上正确安装了所有东西，当我运行 rake db:bootstrap 或 rake db:migrate 时，我得到了这个：

rake aborted!
undefined method `set_preference' for nil:NilClass
/home/chrisisraw/webapps/rails/gems/gems/activesupport-3.0.5/lib/active_support/whiny_nil.rb:48:in `method_missing'
/home/chrisisraw/webapps/rails/gems/bundler/gems/spree-17e74dd1e908/core/lib/spree/preference_access.rb:18:in `set'
/home/chrisisraw/webapps/rails/gems/bundler/gems/spree-17e74dd1e908/core/lib/spree/preference_access.rb:17:in `each'
/home/chrisisraw/webapps/rails/gems/bundler/gems/spree-17e74dd1e908/core/lib/spree/preference_access.rb:17:in `set'
/home/chrisisraw/webapps/rails/Live-Jolly-Foods/config/initializers/jolly.rb:1
/home/chrisisraw/webapps/rails/gems/gems/activesupport-3.0.5/lib/active_support/dependencies.rb:235:in `load'
/home/chrisisraw/webapps/rails/gems/gems/activesupport-3.0.5/lib/active_support/dependencies.rb:235:in `load'
/home/chrisisraw/webapps/rails/gems/gems/activesupport-3.0.5/lib/active_support/dependencies.rb:225:in `load_dependency'
/home/chrisisraw/webapps/rails/gems/gems/activesupport-3.0.5/lib/active_support/dependencies.rb:596:in `new_constants_in'
/home/chrisisraw/webapps/rails/gems/gems/activesupport-3.0.5/lib/active_support/dependencies.rb:225:in `load_dependency'
/home/chrisisraw/webapps/rails/gems/gems/activesupport-3.0.5/lib/active_support/dependencies.rb:235:in `load'
/home/chrisisraw/webapps/rails/gems/gems/railties-3.0.5/lib/rails/engine.rb:201
/home/chrisisraw/webapps/rails/gems/gems/railties-3.0.5/lib/rails/engine.rb:200:in `each'
/home/chrisisraw/webapps/rails/gems/gems/railties-3.0.5/lib/rails/engine.rb:200
/home/chrisisraw/webapps/rails/gems/gems/railties-3.0.5/lib/rails/initializable.rb:25:in `instance_exec'
/home/chrisisraw/webapps/rails/gems/gems/railties-3.0.5/lib/rails/initializable.rb:25:in `run'
/home/chrisisraw/webapps/rails/gems/gems/railties-3.0.5/lib/rails/initializable.rb:50:in `run_initializers'
/home/chrisisraw/webapps/rails/gems/gems/railties-3.0.5/lib/rails/initializable.rb:49:in `each'
/home/chrisisraw/webapps/rails/gems/gems/railties-3.0.5/lib/rails/initializable.rb:49:in `run_initializers'
/home/chrisisraw/webapps/rails/gems/gems/railties-3.0.5/lib/rails/application.rb:134:in `initialize!'
/home/chrisisraw/webapps/rails/gems/gems/railties-3.0.5/lib/rails/application.rb:77:in `send'
/home/chrisisraw/webapps/rails/gems/gems/railties-3.0.5/lib/rails/application.rb:77:in `method_missing'
/home/chrisisraw/webapps/rails/Live-Jolly-Foods/config/environment.rb:5
/home/chrisisraw/webapps/rails/gems/gems/activesupport-3.0.5/lib/active_support/dependencies.rb:239:in `require'
/home/chrisisraw/webapps/rails/gems/gems/activesupport-3.0.5/lib/active_support/dependencies.rb:239:in `require'
/home/chrisisraw/webapps/rails/gems/gems/activesupport-3.0.5/lib/active_support/dependencies.rb:225:in `load_dependency'
/home/chrisisraw/webapps/rails/gems/gems/activesupport-3.0.5/lib/active_support/dependencies.rb:596:in `new_constants_in'
/home/chrisisraw/webapps/rails/gems/gems/activesupport-3.0.5/lib/active_support/dependencies.rb:225:in `load_dependency'
/home/chrisisraw/webapps/rails/gems/gems/activesupport-3.0.5/lib/active_support/dependencies.rb:239:in `require'
/home/chrisisraw/webapps/rails/gems/gems/railties-3.0.5/lib/rails/application.rb:103:in `require_environment!'
/home/chrisisraw/webapps/rails/gems/gems/railties-3.0.5/lib/rails/application.rb:216
/home/chrisisraw/webapps/rails/gems/gems/rake-0.8.7/lib/rake.rb:636:in `call'
/home/chrisisraw/webapps/rails/gems/gems/rake-0.8.7/lib/rake.rb:636:in `execute'
/home/chrisisraw/webapps/rails/gems/gems/rake-0.8.7/lib/rake.rb:631:in `each'
/home/chrisisraw/webapps/rails/gems/gems/rake-0.8.7/lib/rake.rb:631:in `execute'
/home/chrisisraw/webapps/rails/gems/gems/rake-0.8.7/lib/rake.rb:597:in `invoke_with_call_chain'
/usr/local/ruby1.8.7ee/lib/ruby/1.8/monitor.rb:242:in `synchronize'
/home/chrisisraw/webapps/rails/gems/gems/rake-0.8.7/lib/rake.rb:590:in `invoke_with_call_chain'
/home/chrisisraw/webapps/rails/gems/gems/rake-0.8.7/lib/rake.rb:607:in `invoke_prerequisites'
/home/chrisisraw/webapps/rails/gems/gems/rake-0.8.7/lib/rake.rb:604:in `each'
/home/chrisisraw/webapps/rails/gems/gems/rake-0.8.7/lib/rake.rb:604:in `invoke_prerequisites'
/home/chrisisraw/webapps/rails/gems/gems/rake-0.8.7/lib/rake.rb:596:in `invoke_with_call_chain'
/usr/local/ruby1.8.7ee/lib/ruby/1.8/monitor.rb:242:in `synchronize'
/home/chrisisraw/webapps/rails/gems/gems/rake-0.8.7/lib/rake.rb:590:in `invoke_with_call_chain'
/home/chrisisraw/webapps/rails/gems/gems/rake-0.8.7/lib/rake.rb:583:in `invoke'
/home/chrisisraw/webapps/rails/gems/bundler/gems/spree-17e74dd1e908/core/lib/tasks/core.rake:71
/home/chrisisraw/webapps/rails/gems/gems/rake-0.8.7/lib/rake.rb:636:in `call'
/home/chrisisraw/webapps/rails/gems/gems/rake-0.8.7/lib/rake.rb:636:in `execute'
/home/chrisisraw/webapps/rails/gems/gems/rake-0.8.7/lib/rake.rb:631:in `each'
/home/chrisisraw/webapps/rails/gems/gems/rake-0.8.7/lib/rake.rb:631:in `execute'
/home/chrisisraw/webapps/rails/gems/gems/rake-0.8.7/lib/rake.rb:597:in `invoke_with_call_chain'
/usr/local/ruby1.8.7ee/lib/ruby/1.8/monitor.rb:242:in `synchronize'
/home/chrisisraw/webapps/rails/gems/gems/rake-0.8.7/lib/rake.rb:590:in `invoke_with_call_chain'
/home/chrisisraw/webapps/rails/gems/gems/rake-0.8.7/lib/rake.rb:583:in `invoke'
/home/chrisisraw/webapps/rails/gems/gems/rake-0.8.7/lib/rake.rb:2051:in `invoke_task'
/home/chrisisraw/webapps/rails/gems/gems/rake-0.8.7/lib/rake.rb:2029:in `top_level'
/home/chrisisraw/webapps/rails/gems/gems/rake-0.8.7/lib/rake.rb:2029:in `each'
/home/chrisisraw/webapps/rails/gems/gems/rake-0.8.7/lib/rake.rb:2029:in `top_level'
/home/chrisisraw/webapps/rails/gems/gems/rake-0.8.7/lib/rake.rb:2068:in `standard_exception_handling'
/home/chrisisraw/webapps/rails/gems/gems/rake-0.8.7/lib/rake.rb:2023:in `top_level'
/home/chrisisraw/webapps/rails/gems/gems/rake-0.8.7/lib/rake.rb:2001:in `run'
/home/chrisisraw/webapps/rails/gems/gems/rake-0.8.7/lib/rake.rb:2068:in `standard_exception_handling'
/home/chrisisraw/webapps/rails/gems/gems/rake-0.8.7/lib/rake.rb:1998:in `run'
/home/chrisisraw/webapps/rails/gems/gems/rake-0.8.7/bin/rake:31
/home/chrisisraw/webapps/rails/bin/rake:19:in `load'
/home/chrisisraw/webapps/rails/bin/rake:19

有人知道吗？

Answer 1

你不必删除你的初始化文件initializers/whatever.rb，只需测试spree实例是否存在：

if Spree::Config.instance
    Spree::Config.set(:stylesheets => 'screen')
end

Answer 2

好的，我的扩展程序中似乎有这个：

Spree::Config.set(:stylesheets => 'screen')

但是既然设置了两次？不确定.. 但如果我删除它，一切都会完美运行，因为默认首选项中已经设置了“屏幕”。

然后我必须确保我的迁移以结尾：RAILS_ENV='production'

我们是金子！

Answer 3

在关注 http://osdir.com/ml/spree-user/2009-11/msg00248.html 并在文件 initializers/prefs.rb 中设置禁用 SSL 的首选项后，我遇到了同样的错误。删除它允许我运行我的迁移。

这是在我的开发机器上

Answer 4

我在 rvm 上遇到了同样的问题。与确实有效的干净 gemset 相比，问题在于有问题的 gem 既在捆绑包中，也在 gems 目录中。因此，一种可能的解决方法是创建一个新的 gemset 并运行 bundle install。

Answer 5

按照以下步骤操作：

一：注释掉“config/initializers/spree_config.rb”中的所有内容

二：运行：

bundle exec rake db:migrate

三：取消注释config/initializers/spree_config.rb

四：运行：

bundle exec rake db:bootstrap