doujiu7704
2014-03-19 06:26 阅读 170
已采纳

如何使用golang mgo MongoDb驱动程序获取最后插入的ObjectId

I am using the mgo MongoDB driver for Golang.

Can I get the last ObjectId after inserting a new object?

Or should I create _id manually with bson.NewObjectId?

  • 点赞
  • 写回答
  • 关注问题
  • 收藏
  • 复制链接分享

1条回答 默认 最新

  • 已采纳
    dongshan1036 dongshan1036 2014-03-19 06:47

    With mongodb, and mgo, you are often expected to generate the _id-value yourself using bson.NewObjectId.

    The MongoDB manual states:

    If the document does not specify an _id field, then MongoDB will add the _id field and assign a unique ObjectId for the document before inserting. Most drivers create an ObjectId and insert the _id field, but the mongod will create and populate the _id if the driver or application does not.

    Simply, creating the _id yourself is the way to go!

    点赞 评论 复制链接分享

相关推荐