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具体来说，Capistrano 3.7.2、Rails 5.0.2 和 Ruby 2.4.0。我得到的错误发生在Execute load:defaults：

** Execute load:defaults
cap aborted!
NameError: uninitialized constant ActiveSupport::Rescuable
/Users/username/.rvm/gems/ruby-2.4.0/gems/actionmailer-5.0.2/lib/action_mailer/rescuable.rb:6:in `<module:Rescuable>'
/Users/username/.rvm/gems/ruby-2.4.0/gems/actionmailer-5.0.2/lib/action_mailer/rescuable.rb:4:in `<module:ActionMailer>'
/Users/username/.rvm/gems/ruby-2.4.0/gems/actionmailer-5.0.2/lib/action_mailer/rescuable.rb:1:in `<top (required)>'
/Users/username/.rvm/gems/ruby-2.4.0/gems/actionmailer-5.0.2/lib/action_mailer/base.rb:8:in `require'
/Users/username/.rvm/gems/ruby-2.4.0/gems/actionmailer-5.0.2/lib/action_mailer/base.rb:8:in `<top (required)>'
/Users/username/rails_5_test_app/config/deploy/notify/cap_mailer.rb:5:in `require'
/Users/username/rails_5_test_app/config/deploy/notify/cap_mailer.rb:5:in `<top (required)>'
config/deploy.rb:4:in `require'
config/deploy.rb:4:in `<top (required)>'
/Users/username/.rvm/gems/ruby-2.4.0/gems/capistrano-3.7.2/lib/capistrano/setup.rb:27:in `load'
/Users/username/.rvm/gems/ruby-2.4.0/gems/capistrano-3.7.2/lib/capistrano/setup.rb:27:in `block (3 levels) in <top (required)>'
/Users/username/.rvm/gems/ruby-2.4.0/gems/capistrano-3.7.2/lib/capistrano/configuration/variables.rb:32:in `untrusted!'
/Users/username/.rvm/rubies/ruby-2.4.0/lib/ruby/2.4.0/delegate.rb:83:in `method_missing'
/Users/username/.rvm/gems/ruby-2.4.0/gems/capistrano-3.7.2/lib/capistrano/setup.rb:26:in `block (2 levels) in <top (required)>'
/Users/username/.rvm/gems/ruby-2.4.0@global/gems/rake-12.0.0/lib/rake/task.rb:250:in `block in execute'
/Users/username/.rvm/gems/ruby-2.4.0@global/gems/rake-12.0.0/lib/rake/task.rb:250:in `each'
/Users/username/.rvm/gems/ruby-2.4.0@global/gems/rake-12.0.0/lib/rake/task.rb:250:in `execute'
/Users/username/.rvm/gems/ruby-2.4.0@global/gems/rake-12.0.0/lib/rake/task.rb:194:in `block in invoke_with_call_chain'
/Users/username/.rvm/rubies/ruby-2.4.0/lib/ruby/2.4.0/monitor.rb:214:in `mon_synchronize'
/Users/username/.rvm/gems/ruby-2.4.0@global/gems/rake-12.0.0/lib/rake/task.rb:187:in `invoke_with_call_chain'
/Users/username/.rvm/gems/ruby-2.4.0@global/gems/rake-12.0.0/lib/rake/task.rb:180:in `invoke'
/Users/username/.rvm/gems/ruby-2.4.0@global/gems/rake-12.0.0/lib/rake/application.rb:152:in `invoke_task'
/Users/username/.rvm/gems/ruby-2.4.0@global/gems/rake-12.0.0/lib/rake/application.rb:108:in `block (2 levels) in top_level'
/Users/username/.rvm/gems/ruby-2.4.0@global/gems/rake-12.0.0/lib/rake/application.rb:108:in `each'
/Users/username/.rvm/gems/ruby-2.4.0@global/gems/rake-12.0.0/lib/rake/application.rb:108:in `block in top_level'
/Users/username/.rvm/gems/ruby-2.4.0@global/gems/rake-12.0.0/lib/rake/application.rb:117:in `run_with_threads'
/Users/username/.rvm/gems/ruby-2.4.0@global/gems/rake-12.0.0/lib/rake/application.rb:102:in `top_level'
/Users/username/.rvm/gems/ruby-2.4.0@global/gems/rake-12.0.0/lib/rake/application.rb:80:in `block in run'
/Users/username/.rvm/gems/ruby-2.4.0@global/gems/rake-12.0.0/lib/rake/application.rb:178:in `standard_exception_handling'
/Users/username/.rvm/gems/ruby-2.4.0@global/gems/rake-12.0.0/lib/rake/application.rb:77:in `run'
/Users/username/.rvm/gems/ruby-2.4.0/gems/capistrano-3.7.2/lib/capistrano/application.rb:14:in `run'
/Users/username/.rvm/gems/ruby-2.4.0/gems/capistrano-3.7.2/bin/cap:3:in `<top (required)>'
/Users/username/.rvm/gems/ruby-2.4.0/bin/cap:22:in `load'
/Users/username/.rvm/gems/ruby-2.4.0/bin/cap:22:in `<main>'
/Users/username/.rvm/gems/ruby-2.4.0/bin/ruby_executable_hooks:15:in `eval'
/Users/username/.rvm/gems/ruby-2.4.0/bin/ruby_executable_hooks:15:in `<main>'
Tasks: TOP => staging

我即将开始将我的 Rails 4 应用程序升级到 Rails 5，并决定做一个小型测试应用程序以确保我所有的 gems 都能正常工作。一切都很好，除了我自 Rails 2 以来一直在使用 Capistrano 部署期间发送电子邮件的代码，当我尝试要求或加载邮件程序代码时会导致此错误；deploy.rb 的第 4 行是必需的。如果我将其注释掉并设置一个标志以不发送电子邮件，则部署工作完美。

邮件代码（基于 Mislav Marohnić 几年前发布的内容）：

cap_mailer.rb：

require "action_mailer"

yaml_config = File.read("config/email.yml")
email_config = YAML.load(yaml_config)
ActionMailer::Base.delivery_method = email_config['delivery_method'] # currently set to :smtp
ActionMailer::Base.smtp_settings = {
    address: email_config['smtp_settings']['address'],
    port: email_config['smtp_settings']['port'],
    notify_emails: email_config['notify_emails']
}
ActionMailer::Base.view_paths = File.dirname(__FILE__)

class CapMailer < ActionMailer::Base
  default :from => 'App Deployment <app_deploy@my.org>'

  def deploy_notification(cap_vars)
    @now = Time.now

    set :body, ENV['comment']

    mail(:to => fetch(:notify_emails),
         :subject => "#{fetch(:human_readable_application_name)} - Changes to application on #{fetch(:stage)} server at #{fetch(:host)}"
    )
  end

  def test_email
    @now = Time.now

    mail(:to => "developer@my.org",
         :subject => "#{fetch(:human_readable_application_name)} - Capistrano test email #{@now.strftime("on %m/%d/%Y at %I:%M %p")}"
    )

  end

end

我只能在网上找到非常相似的邮件设置（例如https://gist.github.com/johnthethird/955917）的引用，这些邮件设置是为旧版本的所有内容编写的。在 Capistrano 部署期间编写了几个用于发送邮件的 gem，但它们也有同样的问题，因为它们真的很旧（capistrano-notifier，capistrano_mailer）。

所以在这一点上我被卡住了。谷歌搜索NameError: uninitialized constant ActiveSupport::Rescuable建议也许这是一个配置问题，但我不知道在那里寻找什么。我的 Rails 安装中有 ActiveSupport::Rescuable；我仔细检查了一遍。任何想法，将不胜感激。

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1 回答 1

2

看起来您需要先加载 ActiveSupport，如下所示：

require "active_support"
require "action_mailer"
于 2017-03-09T00:02:22.093 回答