ill*_*ist 7 ruby ruby-on-rails redis sidekiq
我已经在后台使用sidekiq和redis-server发送电子邮件了.
问题:使用同步方法发送电子邮件时可以.即在...applicants_controller.rb
UserMailer.notify_applicant_assignment(current_assigned_user.id, applicant, workflow_step).deliver
但是,当我使用delay方法发送电子邮件时
在 applicants_controller.rb
UserMailer.delay.notify_applicant_assignment(current_assigned_user.id, applicant, workflow_step)
我得到以下错误undefined method 'background_color' for nil:NilClass的/layouts/user_mailer.html.erb:17:
代码里面 mailers/user_mailer.rb
class UserMailer < ActionMailer::Base
include Sidekiq::Worker
default from: CommonConstants::DO_NOT_REPLY_ADDRESS
layout 'user_mailer'
def notify_applicant_assignment(user_id, applicant_id, workflow_step_id)
@user = User.find(user_id)
@organization = @user.organization
@applicant = Applicant.find(applicant_id)
@url = root_url + 'applicants/' + @applicant.id.to_s
@workflow_step = WorkflowStep.find(workflow_step_id)
mail(to: @user.email, subject: 'Applicant Assigned.')
end
end
代码里面 layouts/user_mailer.html.erb
<body style="background:#f4f4f4;">
<table width="100%" bgcolor="<%= @organization.background_color %>" cellpadding="0" cellspacing="0">
<tr>
<td>
<table align="center" width="730" cellpadding="0" cellspacing="0" >
我在sidekiq控制台遇到错误
2015-03-24T08:58:14Z 5595 TID-cjors WARN: {"retry"=>true, "queue"=>"default", "class"=>"Sidekiq::Extensions::DelayedMailer", "args"=>["---\n- !ruby/class 'UserMailer'\n- :notify_applicant_assignment\n- - 4\n - '9'\n - '9'\n"], "jid"=>"4421abf04e7e6864c7ee9fd8", "enqueued_at"=>1427187124.323067, "error_message"=>"undefined method `background_color' for nil:NilClass", "error_class"=>"ActionView::Template::Error", "failed_at"=>1427187124.3466575, "retry_count"=>4, "retried_at"=>1427187494.9246943}
2015-03-24T08:58:14Z 5595 TID-cjors WARN: undefined method `background_color' for nil:NilClass
2015-03-24T08:58:14Z 5595 TID-cjors WARN: /home/leapfrog/projects/ATS/app/views/layouts/user_mailer.html.erb:17:in `_app_views_layouts_user_mailer_html_erb__235114594899105140_70586860'
/home/leapfrog/.rvm/gems/ruby-2.1.1/gems/actionpack-4.0.4/lib/action_view/template.rb:143:in `block in render'
/home/leapfrog/.rvm/gems/ruby-2.1.1/gems/activesupport-4.0.4/lib/active_support/notifications.rb:161:in `instrument'
/home/leapfrog/.rvm/gems/ruby-2.1.1/gems/actionpack-4.0.4/lib/action_view/template.rb:141:in `render'
/home/leapfrog/.rvm/gems/ruby-2.1.1/gems/actionpack-4.0.4/lib/action_view/renderer/template_renderer.rb:61:in `render_with_layout'
/
延迟扩展的工作方式很可能与您预期的不同。它们与常规异步作业不同。
在文档中，明确指出：
我强烈建议避免在实例上延迟方法。这会在 Redis 中存储对象状态，这些状态可能会过时，从而导致陈旧数据问题。
如果延迟扩展存储未渲染的模板和邮件参数（主题、收件人、发件人等），而不是为过时的实例调用方法本身，我不会感到惊讶。
另外，请注意，尽管Sidekiq 文档声明延迟应应用于类方法，但它notify_applicant_assignment并未定义为类方法（它看起来像实例方法）。
任何类方法都可以通过与上面相同的方法延迟：
我建议创建notify_applicant_assignment一个类方法并再次尝试（注意vs.中的self）。def self.notify_applicant_assignmentdef notify_applicant_assignment
class UserMailer < ActionMailer::Base
include Sidekiq::Worker
default from: CommonConstants::DO_NOT_REPLY_ADDRESS
layout 'user_mailer'
def self.notify_applicant_assignment(user_id, applicant_id, workflow_step_id)
@user = User.find(user_id)
@organization = @user.organization
@applicant = Applicant.find(applicant_id)
@url = root_url + 'applicants/' + @applicant.id.to_s
@workflow_step = WorkflowStep.find(workflow_step_id)
mail(to: @user.email, subject: 'Applicant Assigned.')
end
end
或者，我建议也使用标准异步引擎applicants_controller.rb：
UserMailer.notify_applicant_assignment_async(current_assigned_user.id, applicant, workflow_step)
请让我知道进展如何，以便我可以在需要时进行更多研究。
祝你好运！
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