golang中使用mongo

笔者使用的mongo驱动是mgo, 这个使用的人比较多,文档也比较齐全

• 官网地址:http://labix.org/mgo
• 文档地址:https://godoc.org/labix.org/v2/mgo
• 源码地址:https://github.com/go-mgo/mgo

1. mgo包安装

go get gopkg.in/mgo.v2

但是貌似现在从gopkg.in下载不了,迂回一下,先从github上下载

go get github.com/go-mgo/mgo

下载好了之后,在$GOPATH/src/下面创建文件夹gopkg.in/mgo.v2, 然后将github.com/go-mgo/mgo的内容,拷贝到gopkg.in/mgo.v2

2. 测试代码

// mongo_test project main.go
package main
import (
 "fmt"
 "math/rand"
 "time"
 "gopkg.in/mgo.v2"
 "gopkg.in/mgo.v2/bson"
)
type GameReport struct {
 // id bson.ObjectId `bson:"_id"`
 Game_id int64
 Game_length int64
 Game_map_id string
}
func err_handler(err error) {
 fmt.Printf("err_handler, error:%s\n", err.Error())
 panic(err.Error())
}
func main() {
 dail_info := &mgo.DialInfo{
 Addrs: []string{"127.0.0.1"},
 Direct: false,
 Timeout: time.Second * 1,
 Database: "game_report",
 Source: "admin",
 Username: "test1",
 Password: "123456",
 PoolLimit: 1024,
 }
 session, err := mgo.DialWithInfo(dail_info)
 if err != nil {
 fmt.Printf("mgo dail error[%s]\n", err.Error())
 err_handler(err)
 }
 defer session.Clone()
 // set mode
 session.SetMode(mgo.Monotonic, true)
 c := session.DB("game_report").C("game_detail_report")
 r := rand.New(rand.NewSource(time.Now().UnixNano()))
 report := GameReport{
 // id: bson.NewObjectId(),
 Game_id: 100,
 Game_length: r.Int63() % 3600,
 Game_map_id: "hello",
 }
 err = c.Insert(report)
 if err != nil {
 fmt.Printf("try insert record error[%s]\n", err.Error())
 err_handler(err)
 }
 result := GameReport{}
 var to_find_game_id int64 = 100
 err = c.Find(bson.M{"game_id": to_find_game_id}).One(&result)
 if err != nil {
 fmt.Printf("try find record error[%s]\n", err.Error())
 err_handler(err)
 }
 fmt.Printf("res, game_id[%d] length[%d] game_map_id[%s]\n",
 to_find_game_id, result.Game_length, result.Game_map_id)
 // try find all report
 var results []GameReport
 err = c.Find(bson.M{}).All(&results)
 if err != nil {
 fmt.Printf("try game all record of game_detail_report error[%s]\n",
 err.Error())
 err_handler(err)
 }
 result_count := len(results)
 fmt.Printf("result count: %d\n", result_count)
 for i, report := range results {
 fmt.Printf("index: %d, report{ game_id: %d, game_length: %d, game_map_id: %s}\n",
 i, report.Game_id, report.Game_length, report.Game_map_id)
 }
}

这样要注意的一点是 GameReport 里面的字段都要首字母大写,否则不会写入mongo

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