golang 使用mgo 连接MongoDB

下面是开发中自己写的一个用mgo连接MongoDB数据库的使用实例。

package main


import (

    "fmt"
    "labix.org/v2/mgo"
    "labix.org/v2/mgo/bson"
)

type Person struct {
    NAME  string
    PHONE string
}
type Men struct {
    Persons []Person
}
const = (
    URL = "192.168.2.175:27017"
)
func main() {

    session, err := mgo.Dial(URL)  //连接数据库
    if err != nil {
        panic(err)
    }
    defer session.Close()
    session.SetMode(mgo.Monotonic, true)

    db := session.DB("mydb")     //数据库名称
    collection := db.C("person") //如果该集合已经存在的话，则直接返回


    //*****集合中元素数目********
    countNum, err := collection.Count()
    if err != nil {
        panic(err)
    }
    fmt.Println("Things objects count: ", countNum)

    //*******插入元素*******
    temp := &Person{
        PHONE: "18811577546",
        NAME:  "zhangzheHero"
    }
        //一次可以插入多个对象 插入两个Person对象
    err = collection.Insert(&Person{"Ale", "+55 53 8116 9639"}, temp)
    if err != nil {
        panic(err)
    }

    //*****查询单条数据*******
    result := Person{}
    err = collection.Find(bson.M{"phone": "456"}).One(&result)
    fmt.Println("Phone:", result.NAME, result.PHONE)

    //*****查询多条数据*******
    var personAll Men  //存放结果
    iter := collection.Find(nil).Iter()
    for iter.Next(&result) {
        fmt.Printf("Result: %v\n", result.NAME)
        personAll.Persons = append(personAll.Persons, result)
    }

    //*******更新数据**********
    err = collection.Update(bson.M{"name": "ccc"}, bson.M{"$set": bson.M{"name": "ddd"}})
    err = collection.Update(bson.M{"name": "ddd"}, bson.M{"$set": bson.M{"phone": "12345678"}})
    err = collection.Update(bson.M{"name": "aaa"}, bson.M{"phone": "1245", "name": "bbb"})

    //******删除数据************
    _, err = collection.RemoveAll(bson.M{"name": "Ale”})
}