mongo-go-driver通过_id查找文档

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

func FindDocumentByID(collection *mongo.Collection, id string) (*mongo.SingleResult, error) {
    // 将id转换为ObjectID类型
    objectID, err := primitive.ObjectIDFromHex(id)
    if err != nil {
        return nil, err
    }

    // 构建查询过滤器
    filter := bson.M{"_id": objectID}

    // 执行查询
    result := collection.FindOne(context.TODO(), filter)

    return result, nil
}

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

func main() {
    // 创建MongoDB客户端
    clientOptions := options.Client().ApplyURI("mongodb://localhost:27017")
    client, err := mongo.Connect(context.TODO(), clientOptions)
    if err != nil {
        panic(err)
    }

    // 获取集合对象
    collection := client.Database("your_database_name").Collection("your_collection_name")

    // 通过_id查找文档
    result, err := FindDocumentByID(collection, "your_document_id")
    if err != nil {
        panic(err)
    }

    // 处理查询结果
    if result.Err() != nil {
        // 查询结果出错
        panic(result.Err())
    }

    // TODO: 处理文档结果
}