生产耙子任务不识别我的模型

Question

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，都会收到错误。这发生在rake db:seed，一个标准的rake任务，以及我自己定制的任务中，明确包括：环境。我甚至这样做冗余：

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 

我找不到任何其他地方提到这个问题，所有这些任务在开发中完美运行。感谢您的任何见解，这里是完整的错误消息rake任务尽快吐出来，因为他们遇到雷在Heroku上的模型：

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 

Answer 1

默认线程设置dependency_loading =假
如果你想使你的应用程序线程，并访问您的模型在你的任务中，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/

希望这有助于！

Answer 2

我曾在config/environments/production.rb

禁用配置在我的生产环境threadsafe! = true这解决了这个问题。

在这里找到了答案：rake aborted! uninitialized constant Object::Country, why can't see model?给出了一些更多的解释和其它解决方法的选择（特别是最后一个环节）