Rails在生產中未初始化的常量

Question

我有一個奇怪的問題。在開發中這個問題並不存在，但在生產耙子拋出這個錯誤消息在我「未初始化的常量程序」

「程序」是一個活動的記錄模型，它在那裏，它在模式文件中，它在應用/模型文件夾。

我像這樣使用rake import執行它：xml RAILS_ENV = production。可能是什麼問題呢？以下是完整的堆棧跟蹤18

rake import:xml RAILS_ENV=production --trace 
(in /usr/mobloom/www/htdocs/remindertest) 
** Invoke import:xml (first_time) 
** Invoke environment (first_time) 
** Execute environment 
** Execute import:xml 
rake aborted! 
uninitialized constant Program 
/usr/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:2503:in `const_missing' 
/usr/lib/ruby/gems/1.8/gems/activesupport-2.3.8/lib/active_support/dependencies.rb:92:in `const_missing' 
/usr/mobloom/www/htdocs/remindertest/lib/tasks/import_assets.rake:18 
/usr/mobloom/www/htdocs/remindertest/lib/tasks/import_assets.rake:9:in `each' 
/usr/mobloom/www/htdocs/remindertest/lib/tasks/import_assets.rake:9 
/usr/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:636:in `call' 
/usr/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:636:in `execute' 
/usr/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:631:in `each' 
/usr/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:631:in `execute' 
/usr/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:597:in `invoke_with_call_chain' 
/usr/lib/ruby/1.8/monitor.rb:242:in `synchronize' 
/usr/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:590:in `invoke_with_call_chain' 
/usr/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:583:in `invoke' 
/usr/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:2051:in `invoke_task' 
/usr/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:2029:in `top_level' 
/usr/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:2029:in `each' 
/usr/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:2029:in `top_level' 
/usr/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:2068:in `standard_exception_handling' 
/usr/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:2023:in `top_level' 
/usr/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:2001:in `run' 
/usr/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:2068:in `standard_exception_handling' 
/usr/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:1998:in `run' 
/usr/lib/ruby/gems/1.8/gems/rake-0.8.7/bin/rake:31 
/usr/bin/rake:19:in `load' 
/usr/bin/rake:19 

行：程序= Program.find（：第一，：條件=> [ '？programident ='，廣播[ 'PROGRAM'] [ 'PROGRAMME_ID']]）

Answer 1

你可能已經忘記依靠你的任務：環境。

task :xml => :environment do 
    ...code here... 
end 

EDITED！可能不是正確的答案看着渴望加載的答案。

Answer 2

嘗試

require 'app/models/program' 

，或者如果你最需要你的模型

Rails.application.eager_load! 

耙並不急於加載您的模型。

在這裏看到一個很好的解釋Rails 3 rake task can't find model in production