db:种子不加载模型

Question

我正在尝试使用标准db/seeds.rb方法为我的数据库设定种子.这在我的开发机器上工作正常,但在我的服务器上,我得到:

$ sudo rake db:seed RAILS_ENV=production --trace
** Invoke db:seed (first_time)
** Invoke environment (first_time)
** Execute environment
** Execute db:seed
rake aborted!
uninitialized constant Permission
/usr/local/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:2503:in `const_missing'
/usr/local/lib/ruby/gems/1.8/gems/activesupport-2.3.4/lib/active_support/dependencies.rb:92:in `const_missing'
/path/.../.../.../.../db/seeds.rb:4
/usr/local/lib/ruby/gems/1.8/gems/rails-2.3.4/lib/tasks/databases.rake:215:in `load'
/usr/local/lib/ruby/gems/1.8/gems/rails-2.3.4/lib/tasks/databases.rake:215
/usr/local/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:636:in `call'
...

但是当我在控制台中检查时,模型确实存在:

$ script/console production
Loading production environment (Rails 2.3.4)
>> Permission
=> Permission(id: integer, ..., created_at: datetime, updated_at: datetime)

我忘记了什么？

Answer 1

在发布链接到上面和此处的博客的评论中:http://www.builtfromsource.com/2011/02/09/getting-rake-dbseed-and-config-threadsafe-to-play-nice/

布鲁斯亚当斯提到可以打电话:

config.threadsafe!除非$ rails_rake_task

仅在不运行rake任务时打开线程安全.

但由于问题确实是线程安全关闭依赖性加载,你可以在config.threadsafe之后添加这一行!保持启用状态,但仍按预期加载环境.

config.dependency_loading =如果是$ rails_rake_task则为true

Answer 2

可以通过threadsafe!在环境配置中禁用来修复它.