回形针，记录先于文件保存到磁盘上保存
我正在上传图像，并且创建新记录时会触发观察者。在观察者中，我通过 API 将图像推送到其他服务。 问题是在本地或在 rspec 测试中执行此操作时，似乎在将图像保存在磁盘上之前将记录保存在数据库中，并且我收到文件未找到错误。如何使其保持正确的顺序？
I'm uploading an image and there is observer which is triggered when new record is created. In observer I'm pushing image via API to other service.
Problem is when doing it locally or in rspec test, seems that record is saved in DB before image is saved on disk and I'm getting file not found error. How to make it to keep correct order ?
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观察者在模型中定义的回调之前被触发。因此，在运行回形针的
after_save方法处理附件之前，会调用观察者的after_create方法。考虑使用
after_commit或ar_after_transaction而不是after_save等。当与外部 API 通信时，这就是您想要的，因为否则 API 调用不能如果事务回滚则撤消。Observers are triggered before callbacks defined in the model. Therefore the
after_createmethod of your observer is invoked before paperclip'safter_savemethod is run which processes the attachment.Consider using
after_commitorar_after_transactioninstead ofafter_saveetc. When communicating with an external API this is what you want anyway, since otherwise API calls can not be undone if the transaction is rolled back.我不知道你的观察者和代码的内部结构。一个可能的解决方案是更改在
after_create事件上触发的观察者。I don't know the internals of your observer and your code. A possible solution would be to change the observer to be triggered on the
after_createevent.