检查记录是否刚刚在铁轨上被销毁

record.destroyed?

详情请点击此处 ActiveRecord::Persistence

你可以做到这一点。

Record.exists?(record.id)

attr_accessor :destroyed
after_destroy :mark_as_destroyed
def mark_as_destroyed
  self.destroyed = true
end

然后检查 record.destroyed .

这很快就会到来。在最近的…… Riding Rails 帖子中写道:

只有当实例 您当前查看的是 成功销毁。

destroy 调用对象只返回对以下对象的调用 freeze frozen? 这是你最好的选择。你的另一个选择是从 ActiveRecord::RecordNotFound record.reload .

record = Object.find(params[:id])
if record.destroy
  ... happy path
else
  ... sad path
end

如果不了解你的应用程序的更多逻辑,我认为它会冻结吗?这是你最好的选择。

  record.destroyed? # doesn't always work (see below)
  # or...
  Record.exists?(record.id) # very fast!

record.destroyed? 更好,因为它不会发送额外的数据库请求,但实际上 Record.exists? 如此极端

record.destroy ,这将 https://apidock.com/rails/v5.2.3/ActiveRecord/Persistence/destroy

# Assuming no issues when destroying the record...
x = record_one.destroy
x.destroyed? # Would return false! (even though the record no longer exists in the db)
Record.exists?(x) # Would correctly return false
# vs.
record_two.destroy
record_two.destroyed? # Would correctly return true
Record.exists?(record_two) # Would correctly return false

destroy! 会扔一个 ActiveRecord::RecordNotDestroyed before_destroy

def destroy
  render json: @record.destroy!
rescue ActiveRecord::RecordNotDestroyed
  # @record will work fine down here, it still exists.
  render json: { errors: ["Record not destroyed"] }
end