在使用官方mongoDB驱动程序的go中，ObjectID自动设置为"0...0“

package main

import (
    "context"
    "fmt"
    "log"
    "time"

    "go.mongodb.org/mongo-driver/bson/primitive"
    "go.mongodb.org/mongo-driver/mongo"
    "go.mongodb.org/mongo-driver/mongo/options"
)

func main() {
    // 创建一个MongoDB客户端
    client, err := mongo.NewClient(options.Client().ApplyURI("mongodb://localhost:27017"))
    if err != nil {
        log.Fatal(err)
    }

    // 连接MongoDB
    ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
    defer cancel()
    err = client.Connect(ctx)
    if err != nil {
        log.Fatal(err)
    }

    // 选择数据库和集合
    collection := client.Database("mydb").Collection("mycollection")

    // 生成ObjectID
    objectID := primitive.NewObjectID()

    // 插入文档
    doc := bson.M{"_id": objectID, "name": "John Doe"}
    _, err = collection.InsertOne(ctx, doc)
    if err != nil {
        log.Fatal(err)
    }

    fmt.Println("ObjectID:", objectID.Hex())
}