编码：utf-8

Question

我有一个观察员在记录（预订）状态发生变化时创建一些记录（票证）。它在运行应用程序时工作正常。但是在迁移期间或在rails控制台中不会运行。我可以理解，它应该

这是在application.rb

# Activate observers that should always be running.
config.active_record.observers = :booking_observer

heres是观察者（booking_observer.rb）

编码：utf-8

class BookingObserver < ActiveRecord::Observer
  require 'logger'

  def create_ticket(booking, passenger, leg)
    ticket = Ticket.factory(booking, passenger, leg)
    begin
      ticket.save!
    rescue Exception => e
      booking.logger.error "Can't save #{leg} ticket: #{e}"
    end
  end

  def after_update(booking)
    if booking.changed? && booking.changed_attributes()["status"]!=Booking::CONFIRMED && booking.status==Booking::CONFIRMED.to_sym
      passengers = booking.passengers.all
      passengers.each do |passenger|
        booking.logger.error "Passenger: #{passenger}"
        create_ticket(booking, passenger, Booking::DEPARTURE_LEG)
        create_ticket(booking, passenger, Booking::RETURN_LEG) if booking.booking_type.to_sym != :ow
      end
    end
  end
end

以下是迁移示例

class CreateTicketsForValidBookings < ActiveRecord::Migration
  def up
    bookings = Booking.where("departure_date < ?", 1.minute.ago).where(status: "confirmed")
    bookings.each do |booking|
      booking.status="migrating"
      booking.save
      booking.status="confirmed"
      booking.save
    end
  end

  def down
    bookings = Booking.where("departure_date < ?", 1.minute.ago).where(status: "migrating")
    bookings.each do |booking|
      booking.status="confirmed"
      booking.save
    end
  end
end

在我发现的每一篇文章中，人们都试图禁用观察者。好吧，就我而言，它是向后的

Answer 1

事实证明，你必须在每个环境的基础上启用观察者。这三个文件

config/enviroments/development.rb
config/enviroments/test.rb
config/enviroments/production.rb

必须激活应始终使用。

运行的观察者

config.active_record.observers = :booking_observer

观察者没有运行

编码：utf-8

1 个答案: