在Mongo-go-driver中创建一个唯一的字段

import (
    "go.mongodb.org/mongo-driver/mongo"
    "go.mongodb.org/mongo-driver/mongo/options"
)

client, err := mongo.Connect(context.TODO(), options.Client().ApplyURI("mongodb://localhost:27017"))
if err != nil {
    log.Fatal(err)
}

collection := client.Database("your_database").Collection("your_collection")

indexModel := mongo.IndexModel{
    Keys:    bson.M{"your_field": 1},
    Options: options.Index().SetUnique(true),
}
_, err = collection.Indexes().CreateOne(context.TODO(), indexModel)
if err != nil {
    log.Fatal(err)
}