Primitive.ObjectID 到 Golang 中的字符串 [英] Primitive.ObjectID to string in Golang

问题描述

我正在尝试在 Go 中将 primitive.ObjectID 类型转换为 string 类型.我正在使用 go.mongodb.org/mongo-driver 中的 mongo-driver.

I am trying to convert type primitive.ObjectID to string type in Go. I am using mongo-driver from go.mongodb.org/mongo-driver.

我尝试使用类型断言

mongoId := mongoDoc["_id"];
stringObjectID := mongoId.(string)

VSCode 接受哪个.代码被编译，当它到达这个特定的代码行时，它会抛出这个错误

Which VSCode accepts. Code gets compiled and when it reaches this specific line of code, it throws this error

panic: interface conversion: interface {} is primitive.ObjectID, not string

推荐答案

错误信息告诉 mongoDoc["_id"] 是 interface{} 类型，它持有一个primitive.ObjectID.这不是 string，它是一个独特的类型.您只能从接口值中键入 assert primitive.ObjectID.

The error message tells mongoDoc["_id"] is of type interface{} which holds a value of type primitive.ObjectID. This is not a string, it's a distinct type. You can only type assert primitive.ObjectID from the interface value.

如果你想要这个 MongoDB ObjectId 的 string 表示，你可以使用它的 ObjectID.Hex() 方法来获取 ObjectId 字节的十六进制表示:

If you want a string representation of this MongoDB ObjectId, you may use its ObjectID.Hex() method to get the hex representation of the ObjectId's bytes:

mongoId := mongoDoc["_id"]
stringObjectID := mongoId.(primitive.ObjectID).Hex()

这篇关于Primitive.ObjectID 到 Golang 中的字符串的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！