插入时mgo NewObjectId损坏 [英] mgo NewObjectId corrupt on insert

问题描述

  obId：= bson.NewObjectId（）$ b如果我为mgo中的文档生成新的对象ID， $ b  

然后插入它，它以mongo结尾（通过cli查看）为

 _ id：U ` \\\@ \rU\\\\\\\\\

  

当它应该是

 _ id：ObjectId（559a47643d9827f0d9405420）
  

如果尝试更新现有的/ b

  obId：= bson.ObjectIdHex（stringId）
  

它仍然被序列化为损坏的格式。

我尝试的结构插入如下所示：

  type MyStruct struct {
 Id bson.ObjectId`bson：_ id，omitempty json：id`
 ... 
} 
  

解决方案

代表U ` \\\@ \rU\\\\\\\\\
清楚地表明ObjectId以字符串的形式发送到数据库，而不是一个正确类型的对象ID。之前的每个这种情况都是应用程序端的代码路径，因为这样错误地传递了字符串。我建议调查在该集合中插入对象的每个代码路径，并且如果您没有发现将它作为实际字符串发送的情况，则尝试创建一个复制器并将其上报给mgo驱动程序。

更新：根据以下您的评论，问题是由于应用程序的某些部分正在使用 ObjectId 从一个不是在与数据库通信期间实际使用的包中输入。这具有上述效果：来自错误包的 ObjectId 类型只是一个普通字符串，只要正确的 bson 软件包。

If I generate a new object id for a document in mgo:

obId := bson.NewObjectId()

and then insert it, it ends up in mongo (looking via the cli) as

"_id" : "U�`�\u0006@�\rU\u0000\u0000\u0001"

When it should be

"_id" : ObjectId("559a47643d9827f0d9405420")

Same goes if I try and update an existing document where I generate the id by

obId := bson.ObjectIdHex(stringId)

It still gets serialized to the corrupted format.

My struct which I'm trying to insert looks like this:

type MyStruct struct {
    Id            bson.ObjectId `bson:"_id,omitempty" json:"id"`
    ...
}

解决方案

The representation "U�`�\u0006@�\rU\u0000\u0000\u0001" is clearly indicating that an ObjectId got sent to the database as a string rather than as a properly typed object id. Every such case before was a code path in the application side delivering the string explicitly as such by mistake. I recommend investigating every code path that inserts objects in that collection, and if you can find no case that is sending it as an actual string, then try to create a reproducer and report it upstream to the mgo driver.

Update: Per your comment below, the issue is being caused because some part of the application is using an ObjectId type from a package that is not the one actually used during communication with the database. This has the effect described above: the ObjectId type coming from the wrong package is just a normal string, as far as the correct bson package is concerned.

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