生產耙子任務不識別我的模型

Question

當我運行Heroku Bamboo時，這從來都不是問題。現在，在Cedar上，每當我嘗試從服務器上的rake任務中訪問我的模型時，都會收到錯誤。這發生在rake db:seed，一個標準的rake任務，以及我自己定製的任務中，明確包括：環境。我甚至這樣做冗餘：

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這個問題，所有這些任務在開發中完美運行。感謝您的任何見解，這裏是完整的錯誤消息rake任務儘快吐出來，因爲他們遇到雷在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

默認線程設置dependency_loading =假
如果你想使你的應用程序線程，並訪問您的模型在你的任務中，你需要加載它。

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

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

希望這有助於！

Answer 2

我曾在config/environments/production.rb

禁用配置在我的生產環境threadsafe! = true這解決了這個問題。

在這裏找到了答案：rake aborted! uninitialized constant Object::Country, why can't see model?給出了一些更多的解釋和其它解決方法的選擇（特別是最後一個環節）