golang操作mongodb

相关库资源：https://github.com/mongodb/mongo-go-driver

//该文件主要用于初始化mongoClient供全局调用

package mongodb

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

var (
	MongoDb *mongo.Client
)

func init()  {

	fmt.Println("start mongodb init ....")
	ctx, cancel := context.WithTimeout(context.Background(), 3 * time.Second)
	defer cancel()

	var err error

	MongoDb, err = mongo.Connect(ctx, options.Client().ApplyURI("mongodb://localhost:27017").SetMaxPoolSize(30).SetMaxConnIdleTime(time.Duration(30) * time.Second).SetConnectTimeout(time.Duration(3) * time.Second).SetTimeout(time.Duration(10) * time.Second))
	if err != nil {
		panic(any(err))
	}

	fmt.Println("end mongodb init ....")
}

//该文件演示了如果使用mongoClient进行相关操作

package main

import (
	"context"
	"fmt"
	"go-test/mongodb"
	"go.mongodb.org/mongo-driver/bson"
	"go.mongodb.org/mongo-driver/mongo"
	"log"
)

func main()  {

	result := make(map[string]interface{})
	collection := mongodb.MongoDb.Database("test").Collection("ceshi")
	filter := bson.D{{"uid", 1024}}
	err := collection.FindOne(context.Background(), filter).Decode(&result)

	if err == mongo.ErrNoDocuments {
		// Do something when no record was found
		fmt.Println("record does not exist")
		return
	} else if err != nil {
		log.Fatal(err)
	}

	fmt.Println(result)
}

以上为演示代码，具体内容和示例请看官方文档介绍。