gorose, 最像 laravel's eloquent 的go数据库操作orm, 风骚的链式调用, 让你深深陷入不能自拔

龙飞来也 · · 128 次点击 · · 开始浏览    
这是一个创建于 的文章,其中的信息可能已经有所发展或是发生改变。

简介

gorose(go orm), 一个小巧强悍的go语言数据库操作orm, 灵感来源于laravel的数据库操作orm, 也就是eloquent, php、python、ruby开发者, 都会喜欢上这个orm的操作方式, 主要是链式操作比较风骚

文档

先睹为快

db.Table("tablename").First()
db.Table("tablename").Distinct().Where("id", ">", 5).Get()
db.Table("tablename").Fields("id, name, age, job").Group("job").Limit(10).Offset(20).Order("id desc").Get()

安装

  • 安装 gorose
go get github.com/gohouse/gorose

配置和示例

  • 多个数据库连接配置
import "github.com/gohouse/gorose"

var dbConfig = map[string]map[string]string {
    "mysql": {
        "host":     "localhost",
        "username": "root",
        "password": "",
        "port":     "3306",
        "database": "test",
        "charset":  "utf8",
        "protocol": "tcp",
    },
    "mysql_dev": {
        "host":     "localhost",
        "username": "root",
        "password": "",
        "port":     "3306",
        "database": "gorose",
        "charset":  "utf8",
        "protocol": "tcp",
    },
}

gorose.Open(dbConfig, "mysql")

var db gorose.Database

func main() {
    res := db.Table("users").First()
    
    fmt.Println(res)
}
  • 简单的但数据库配置
gorose.Open(map[string]string {
                "host":     "localhost",
                "username": "root",
                "password": "",
                "port":     "3306",
                "database": "test",
                "charset":  "utf8",
                "protocol": "tcp",
            })

用法示例

查询

原生sql语句查询

db.Query("select * from user where id = 1")

链式调用查询

db.Table("user").
    Field("id, name").  // field
    Where("id",">",1).  // simple where
    Where(map[string]interface{}{"name":"fizzday", "age":18}).  // where object
    Where([]map[string]interface{}{{"website", "like", "fizz"}, {"job", "it"}}).    // multi where
    Where("head = 3 or rate is not null").  // where string
    OrWhere("cash", "1000000"). // or where ...
    OrWhere("score", "between", []string{50, 80}).  // between
    OrWhere("role", "not in", []string{"admin", "read"}).   // in 
    Group("job").   // group
    Order("age asc").   // order 
    Limit(10).  // limit
    Offset(1).  // offset
    Get()   // fetch multi rows

得到sql结果:

select id,name from user 
    where (id>1) 
    and (name='fizzday' and age='18') 
    and ((website like '%fizz%') and (job='it'))
    and (head =3 or rate is not null)
    or (cash = '100000') 
    or (score between '50' and '100') 
    or (role not in ('admin', 'read'))
    group by job 
    order by age asc 
    limit 10 offset 1

更多链式查询示例

  • 获取user表对象
User := db.Table("user")
  • 查询一条
User.First()
// 或者
db.Fisrt()

parse sql result: select * from user limit 1

  • count统计
User.Count("*")
// 或(下同) 
db.Count("*")

最终执行的sql为: select count(*) as count from user

  • max
User.Max("age")

最终执行的sql为: select max(age) as max from user

  • min
User.Min("age")

最终执行的sql为: select min(age) as min from user

  • avg
User.Avg("age")

最终执行的sql为: select avg(age) as avg from user

  • distinct
User.Fields("id, name").Distinct()

最终执行的sql为: select distinct id,name from user

嵌套where的查询 (where nested)

db.Table("user").Where("id", ">", 1).Where(func() {
		db.Where("name", "fizz").OrWhere(func() {
			db.Where("name", "fizz2").Where(func() {
				db.Where("name", "fizz3").OrWhere("website", "fizzday")
			})
		})
	}).Where("job", "it").First()

最终执行的sql为:

SELECT  * FROM user  
    WHERE  id > '1' 
        and ( name = 'fizz' 
            or ( name = 'fizz2' 
                and ( name = 'fizz3' or website like '%fizzday%')
                )
            ) 
    and job = 'it' LIMIT 1

事务

  • 标准用法
db.Begin()

res := db.Table("user").Where("id", 1).Data(map[string]interface{}{"age":18}).Update()
if (res == 0) {
	db.Rollback()
}

res2 := db.Table("user").Data(map[string]interface{}{"age":18}).Insert()
if (res2 == 0) {
	db.Rollback()
}

db.Commit()
  • 简单用法, 用闭包实现, 自动开始事务, 回滚或提交事务
db.Transaction(func() {
    db.Execute("update area set job='sadf' where id=14")
    db.Table("area").Data(map[string]interface{}{"names": "fizz3", "age": 3}).Insert()
    db.Table("area").Data(map[string]interface{}{"names": "fizz3", "age": 3}).Where("id",10).Update()
})

增删改操作

原生sql字符串

db.Execute("update user set job='it2' where id=3")

链式调用

db.Table("user").
	Data(map[string]interface{}{"age":17, "job":"it3"}).
    Where("id", 1).
    OrWhere("age",">",30).
    Update()

最终执行的sql为: update user set age=17, job='ite3' where (id=1) or (age>30)

更多增删改的用法

  • insert
User.Data(map[string]interface{}{"age":17, "job":"it3"}).Insert()
User.Data([]map[string]interface{}{{"age":17, "job":"it3"},{"age":17, "job":"it4"}).Insert()

最终执行的sql为:

insert into user (age, job) values (17, 'it3')
insert into user (age, job) values (17, 'it3') (17, 'it4')
  • delete
User.Where("id", 5).Delete()

最终执行的sql为: delete from user where id=5

切换数据库连接

// 连接最开始配置的第二个链接(mysql_dev是key)
db.Connect("mysql_dev").Table().First()
// 或者直接输入连接配置
db.Connect(map[string]string {
                "host":     "localhost",
                "username": "root",
                "password": "",
                "port":     "3306",
                "database": "test",
                "charset":  "utf8",
                "protocol": "tcp",
            }).Table().First()

获取原始连接 DB

gorose.GetDB()

获取所有sql记录, 或者获取最后一条sql语句

db.SqlLogs()
db.LastSql()

TODO

[] 读写分离


点击查看最新更新动态

128 次点击  
加入收藏 微博
暂无回复
添加一条新回复 (您需要 登录 后才能回复 没有账号 ?)
  • 请尽量让自己的回复能够对别人有帮助
  • 支持 Markdown 格式, **粗体**、~~删除线~~、`单行代码`
  • 支持 @ 本站用户;支持表情(输入 : 提示),见 Emoji cheat sheet