7

当我运行 Heroku Bamboo 时，这从来都不是问题。现在，在 Cedar 上，每当我尝试从服务器上的 rake 任务中访问我的模型时都会出错。这发生rake db:seed在标准 rake 任务以及我自己的自定义构建任务中，其中明确包含 :environment。我什至这样做是多余的：

namespace :db do
  desc "Update db"
  task :new_seed => :environment do
    require './Scraped_Data/Games/code/column-headers.rb'
    require 'csv'
    require 'net/http'
    require './config/environment.rb'

    # code here...

  end
end

我在其他地方找不到任何提及此问题的内容，并且所有这些任务都在开发中完美运行。感谢您提供任何见解，这是 rake 任务在 Heroku 上遇到我的模型时立即吐出的完整错误消息：

rake aborted!
uninitialized constant Object::Movie
/app/vendor/bundle/ruby/1.9.1/gems/rake-0.9.2.2/lib/rake/ext/module.rb:36:in `const_missing'
/app/lib/tasks/new_seed.rake:187:in `block in load_scraped_data'
/app/vendor/bundle/ruby/1.9.1/gems/rest-open-uri-1.0.0/lib/rest-open-uri.rb:37:in `open'
/app/vendor/bundle/ruby/1.9.1/gems/rest-open-uri-1.0.0/lib/rest-open-uri.rb:37:in `open'
/app/lib/tasks/new_seed.rake:148:in `load_scraped_data'
/app/lib/tasks/new_seed.rake:550:in `block (2 levels) in <top (required)>'
/app/vendor/bundle/ruby/1.9.1/gems/rake-0.9.2.2/lib/rake/task.rb:205:in `call'
/app/vendor/bundle/ruby/1.9.1/gems/rake-0.9.2.2/lib/rake/task.rb:205:in `block in execute'
/app/vendor/bundle/ruby/1.9.1/gems/rake-0.9.2.2/lib/rake/task.rb:200:in `each'
/app/vendor/bundle/ruby/1.9.1/gems/rake-0.9.2.2/lib/rake/task.rb:200:in `execute'
/app/vendor/bundle/ruby/1.9.1/gems/rake-0.9.2.2/lib/rake/task.rb:158:in `block in invoke_with_call_chain'
/usr/local/lib/ruby/1.9.1/monitor.rb:201:in `mon_synchronize'
/app/vendor/bundle/ruby/1.9.1/gems/rake-0.9.2.2/lib/rake/task.rb:151:in `invoke_with_call_chain'
/app/vendor/bundle/ruby/1.9.1/gems/rake-0.9.2.2/lib/rake/task.rb:144:in `invoke'
/app/vendor/bundle/ruby/1.9.1/gems/rake-0.9.2.2/lib/rake/application.rb:116:in `invoke_task'
/app/vendor/bundle/ruby/1.9.1/gems/rake-0.9.2.2/lib/rake/application.rb:94:in `block (2 levels) in top_level'
/app/vendor/bundle/ruby/1.9.1/gems/rake-0.9.2.2/lib/rake/application.rb:94:in `each'
/app/vendor/bundle/ruby/1.9.1/gems/rake-0.9.2.2/lib/rake/application.rb:94:in `block in top_level'
/app/vendor/bundle/ruby/1.9.1/gems/rake-0.9.2.2/lib/rake/application.rb:133:in `standard_exception_handling'
/app/vendor/bundle/ruby/1.9.1/gems/rake-0.9.2.2/lib/rake/application.rb:88:in `top_level'
/app/vendor/bundle/ruby/1.9.1/gems/rake-0.9.2.2/lib/rake/application.rb:66:in `block in run'
/app/vendor/bundle/ruby/1.9.1/gems/rake-0.9.2.2/lib/rake/application.rb:133:in `standard_exception_handling'
/app/vendor/bundle/ruby/1.9.1/gems/rake-0.9.2.2/lib/rake/application.rb:63:in `run'
/app/vendor/bundle/ruby/1.9.1/gems/rake-0.9.2.2/bin/rake:33:in `<top (required)>'
/app/vendor/bundle/ruby/1.9.1/bin/rake:19:in `load'
/app/vendor/bundle/ruby/1.9.1/bin/rake:19:in `<main>'
Tasks: TOP => db:new_seed
4

2 回答 2

20

默认情况下 threadsafe set dependency_loading = false
如果你想在你的应用程序中启用线程安全并在你的任务中访问你的模型，你需要加载它。

# Enable threaded mode
config.threadsafe!
config.dependency_loading = true if $rails_rake_task


参考： http: //nowhereman.github.com/how-to/rails_thread_safe/

希望这有帮助！

于 2012-03-28T13:43:47.417 回答
1

我已经threadsafe! = true在我的生产环境中配置了config/environments/production.rb

禁用它可以解决问题。

答案在这里找到：rake 中止了！未初始化的常量 Object::Country，为什么看不到模型？提供更多解释和其他解决方法选项（特别是最后一个链接）

于 2012-03-23T19:52:25.113 回答