ActiveJob::DeserializationError 在 after_create 回调中 - 未找到记录

Question

在 Rails 6 应用程序中，我有以下代码。

class Reservation < ApplicationRecord
  after_create     :publish_creation

  def publish_creation
    Publishers::Reservations::CreateJob.perform_later(self)
  end
end

class Publishers::Reservations::CreateJob < ApplicationJob
  queue_as :default

  def perform(reservation)
    puts reservation.inspect #dummy code for testing
  end
end

大多数时候我创建 Reservation（记录总是在数据库中创建），我得到以下错误

2020-02-14T09:54:03.707Z pid=81787 tid=1xmj WARN: ActiveJob::DeserializationError: Error while trying to deserialize arguments: Couldn't find Reservation with 'id'= 35651cf7-35bc-4da0-bb0d-6285ac093d22

Sidekiq 第一次重试处理作业时，它总能找到 Reservation 并且一切正常。

Reservation id: "35651cf7-35bc-4da0-bb0d-6285ac093d22", analysis_id: "6b3b167b-1279-49c0-991a-b580c375fd0f", reservable_type: "User", reservable_id: "94f60c16-29d4-4372-983b-7544c393a7e6", reserved_between: 2020-02-10 08:00:00 UTC..2020-02-10 08:10:00 UTC, state: "scheduled", created_at: "2020-02-14 10:02:28", updated_at: "2020-02-14 10:02:28"

我在这里遗漏了什么吗？这是否与我运行处于 development 模式有关，一旦我进入 production 它应该消失吗？

Answer 1

您应该使用 after_commit 而不是 after_create。这是因为

after_create - Is called after Model.save on new objects that haven‘t been saved yet (no record exists). In the case of after_create, this will always be before the call to save (or create) returns. Rails wraps every save inside a transaction and the before/after create callbacks run inside that transaction.

after_commit - Is called after the database transaction is completed. With after_commit, your code doesn't run until after the outermost transaction was committed.

Answer 2

在 Rails 5+ 你可以使用 after_create_commit (docs)

它会在创建事务之后运行，所以记录已经被创建，但与 after_commit 不同的是它只会在 create 之后运行，而不是在 update 也不 destroy.

它是以下的别名： after_commit :your_callback, on: :create

ActiveJob::DeserializationError 在 after_create 回调中 - 未找到记录

ActiveJob::DeserializationError in a after_create callback - Record Not Found

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