问题描述
我正在与Rails和PostgreSQL一起使用，并且保持着一对多的基本关系，一个 Auction 具有许多 Bid s。但是，当我尝试删除拍卖（具有出价）时，出现以下错误：
I'm working with Rails and PostgreSQL and have a basic one-to-many relationship going on, one Auction has many Bids. However when I try and delete an auction (that has bids present) I get the following error:
删除没有出价没有错误。
Deleting auctions with no bids gives no error.
让我感到困惑的部分是在我的拍卖模型中，我有：
The part that confuses me is that inside my Auction model, I have:
has_many :bids, dependent: :destroy
由于我有一个从属破坏子句，为什么我仍然会收到此错误？
Since I have a dependent destroy clause, why am I still getting this error?
编辑：尝试删除整个数据库，然后重新创建/重新迁移所有内容-仍然遇到相同的错误。
I've tried dropping the whole DB, then recreating/re-migrating everything - still get the same error.
推荐答案
我的问题是我尝试删除记录时使用的是 @ auction.delete （在我发布的屏幕快照中可见）。
My issue was that i am using @auction.delete (visible in the screenshot I posted) when trying to remove a record.
删除将忽略我已有的任何回调。因此，即使我有一个从属的destroy子句，也不会被调用-因此Rails会引发错误。如果/当我将代码更改为 @ auction.destroy 时，调用被调用并解决了问题。
Delete will ignore any callbacks I have in place. So even though I have a dependent destroy clause, it is not being called - hence Rails is throwing an error. If/When I changed the code to read @auction.destroy, the call-back got invoked and it solved the problem.
参考：
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