如何根据用户在 Rails 中输入的日期，每周继续向用户发送电子邮件

新的导轨和现在使用窗口，，我有用户插入姓名、日期和电子邮件的网页.根据他的日期输入，我想给他发送电子邮件(如果 @dop.date=date.now-7.days 然后发送电子邮件).我怎么能实现呢??我希望系统获取用户日期并检查它是否用户插入日期，并且日期已经 7 天，然后给他发送电子邮件...

new on rails and using windows for now,, i have web page that user insert name, date and email. depending on his date input i want to send him email(if @dop.date=date.now-7.days then send email ). how could i implement it?? i want the system get user dates and check it if user insert date, and the date has been for 7 days then send him email...

class UserMailer < ActionMailer::Base
  default from: "from@example.com"

  def welcome_email(dop)
    @dop = dop
    @url  = "http://example.com/login"
    mail(:to => dop.mail, :subject => "Welcome to My Awesome Site")
  end
end

 def create
    @dop = Dop.new(params[:dop])

    respond_to do |format|
      if @dop.save
        UserMailer.welcome_email(@dop).deliver
        format.html { redirect_to @dop, notice: 'Dop was successfully created.' }
        format.json { render json: @dop, status: :created, location: @dop }
      else
        format.html { render action: "new" }
        format.json { render json: @dop.errors, status: :unprocessable_entity }
      end
    end
  end

这是我的模型:等级 Dop <ActiveRecord::Baseattr_accessible :date,:mail,:namevalidates_presence_of:namevalidates_presence_of:mailvalidates_uniqueness_of:mail

here is my model: class Dop < ActiveRecord::Base attr_accessible :date,:mail,:name validates_presence_of:name validates_presence_of:mail validates_uniqueness_of:mail

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