Ruby-on-rails ActiveRecord 事务中的错误处理？
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Error Handling in ActiveRecord Transactions?
提问by Kevin
I need to create a row in both tickets and users table... I just need to know how to process in case the transaction fails.
我需要在票证和用户表中创建一行......我只需要知道如何处理，以防交易失败。
@ticket.transaction do
@ticket.save!
@user.save!
end
#if (transaction succeeded)
#.....
#else (transaction failed)
#......
#end
On a side note I'd just like to thank everyone who participates at stack overflow for helping a designer learn more programming... I appreciate the time you guys take out of your day to answer n00b questions like this :)
在旁注中，我只想感谢参与堆栈溢出的每个人帮助设计师学习更多编程......我感谢你们抽出时间来回答这样的 n00b 问题:)
回答by MattMcKnight
If you are using the save! method with a bang (exclamation point), the application will throw an exception when the save fails. You would then have to catch the exception to handle the failure.
如果您使用的是保存！方法带有 bang（感叹号），应用程序将在保存失败时抛出异常。然后，您必须捕获异常以处理失败。
begin
@ticket.transaction do
@ticket.save!
@user.save!
end
#handle success here
rescue ActiveRecord::RecordInvalid => invalid
#handle failure here
end
回答by mportiz08
i'm also a beginner, but i believe that you can check @ticket.errors and @user.errors and validate according to their responses
我也是初学者，但我相信你可以检查@ticket.errors 和@user.errors 并根据他们的回应进行验证
also the save method should return a boolean that determines if the save was successful
保存方法也应该返回一个布尔值来确定保存是否成功
