轨道 3 +操作邮件程序 - 无法循环发送电子邮件

Question

用户可以创建一个对象，并且他有追随者，我想在他创建该对象时提醒他们。

控制器：

if @project.save
  format.html { redirect_to(@project, :notice => 'Project was successfully created.') }
  format.xml  { render :xml => @project, :status => :created, :location => @project }
  # Send a notification to project owner's followers :
  UserMailer.new_project(@project).deliver
else
  ...

user_mailer.rb：

def new_project(project)
    @url  = "http://localhost:3000/"
    @project = project
    # For each of project owner's follower, send an email notification
    @followers = project.owner.followers.all
    @followers.each do |f|
        @u = User.find(f.follower)
        mail(   :to => @u.email,
            :from => '"Beatrix Kiddo" <[email protected]>',
            :subject => "#{project.owner.name} created a new project")
    end
end

使用拥有 2 个关注者的用户进行测试：
User.find(1).followers.count = 2

Follower.follower 是关注者的id。

仅向第一个关注者发送了 1 封电子邮件，而第二个关注者没有收到任何内容 - 出了什么问题？

[已解决] => .deliver 方法根本不支持多条消息。谢谢灾难恢复

Answer 1

ActionMailer 不支持通过一次 deliver 调用发送多条消息。
您必须将循环移到 new_project 方法之外：

而不是

UserMailer.new_project(@project).deliver

尝试这样做：

@followers = @project.owner.followers.all
@followers.each do |f|
    UserMailer.new_project(@project, f).deliver
end

new_project 方法可能如下所示：

def new_project(project, follower)
    @u = User.find(f.follower)
    mail(:to => @u.email,
         :from => '"Beatrix Kiddo" <[email protected]>',
         :subject => "#{project.owner.name} created a new project")
end

Answer 2

您还可以将 .deliver 调用移至 new_project 方法中。这对我使用 Rails 3 有效：

def new_project(project)
  # ...
  @followers.each do |f|
    # ...
    mail(:to => @u.email,
         :from => '"Beatrix Kiddo" <[email protected]>',
         :subject => "#{project.owner.name} created a new project").deliver
  end
end

要发送邮件，您可以使用

if @project.save
   # ...
   UserMailer.new_project(@project)
else
   # ...
end