rails email notification- mailer

Question

我是铁杆新手。用户只有在尚未阅读通知的情况下才需要在几天后收到电子邮件通知。我已经使用Action Mailer创建了电子邮件通知，但在添加时间格式后它无法正常工作。 5天后，该电子邮件仍未提供给用户。

String input = "Hello, world!";
char[] forward = new char[input.length()];
char[] reverse = new char[input.length()];
getCharacters(input, forward, reverse);
// forward and reverse now contain the characters from input

user_mailer.rb

class NotificationsController < ApplicationController

 def show
  @notification = current_user.notifications.find_by_id(params[:id])

  if current_user.notifications.unread > 5.days.ago
   UserMailer.try_notif(@notification, @post, @user).deliver
  end
 end

 def update
  @notification = current_user.notifications.find_by_id(params[:id])
  @notification.update(read: true)
  redirect_to post_path(@notification.post)
 end

 def read_all
  current_user.notifications.unread.update_all(read: true)
 end
end

Answer 1

我认为正确的代码是这样的： 需要使用当前时间检查每个通知

if current_user.notifications.unread
  current_user.notifications.each do |notification|
   if Time.current - notification.created_at > 120  #just checking in hours
    #send reminder
   end
  end
end

或者可以尝试其他方式

@notifications = Notification.where(created_at: 5.days.ago..Time.current, unread: true)
if @notifications 
  @notifications.each do |notification|
   #send notification
  end
end