生产 Rake 任务无法识别我的模型 [英] Production Rake Tasks Don't Recognize My Models
问题描述
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，都会出现错误.这发生在 rake db:seed，一个标准的 rake 任务，以及我自己的明确包含 :environment 的自定义构建任务.我什至这样做是多余的:
When I was running Heroku Bamboo, this was never a problem. Now, on Cedar, I get errors whenever I try to access my models from within a rake task on the server. This happens with rake db:seed, a standard rake task, as well as my own custom built tasks that explicitly include :environment. I even do so redundantly:
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关于此问题的提及，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，这里是在 Heroku 上遇到我的模型时，rake 任务会吐出的完整错误消息:
I can't find any mention of this issue elsewhere, and all of these tasks run perfectly in development. Thanks for any insights, and here is the full error message rake tasks spit out as soon as they encounter a model of mine on Heroku:
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
推荐答案
默认线程安全 set dependency_loading = false
如果要在应用程序中启用线程安全并在任务中访问模型，则需要加载它.
By default threadsafe set dependency_loading = false
If you want to enable threadsafe in your application and access to your models in your task, you'll need to load it.
# Enable threaded mode
config.threadsafe!
config.dependency_loading = true if $rails_rake_task
参考:http://nowhereman.github.com/how-to/rails_thread_safe/
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