gobatis

目前代码都是基于mysql编写测试的,其他数据库暂时还未做兼容处理

db数据源配置

支持多数据源配置
db子级配置为一个map，map的key即为数据源名称标识
map的value为数据源具体配置，具体配置项如下表

配置	是否必填配置	默认值	说明
driverName	是		数据源驱动名，必填配置项
dataSourceName	是		数据源名称，必填配置项，例如: root:123456@tcp(127.0.0.1:3306)/test?charset=utf8
maxLifeTime	否	120(单位: s)	连接最大存活时间，默认值为: 120 单位为: s
maxOpenConns	否	10	最大打开连接数，默认值为: 10
maxIdleConns	否	5	最大挂起连接数，默认值为: 5

示例

db配置示例(配置较之前的有所调整)
以下为多数据源配置示例: db.yml

# 数据库配置
db:
  # 数据源名称1
  - datasource: ds1
    # 驱动名
    driverName: mysql
    # 数据源
    dataSourceName: root:123456@tcp(127.0.0.1:3306)/test?charset=utf8
    # 连接最大存活时间（单位: s）
    maxLifeTime: 120
    # 最大open连接数
    maxOpenConns: 10
    # 最大挂起连接数
    maxIdleConns: 5
  # 数据源名称2
  - datasource: ds2
    # 驱动名
    driverName: mysql
    # 数据源
    dataSourceName: root:123456@tcp(127.0.0.1:3306)/test?charset=utf8
    # 连接最大存活时间（单位: s）
    maxLifeTime: 120
    # 最大open连接数
    maxOpenConns: 10
    # 最大挂起连接数
    maxIdleConns: 5
# 是否显示SQL语句
showSql: true
# 数据表映射文件路径配置
mappers:
  # 映射文件路径， 可以为绝对路径，如: /usr/local/mapper/userMapper.xml
  - mapper/userMapper.xml

mapper配置

mapper可以配置namespace属性
mapper可以包含: select, insert, update, delete标签
mapper子标签id属性则为标签唯一标识, 必须配置属性
其中select标签必须包含resultType属性，resultType可以是: map, maps, array, arrays, struct, structs, value

标签说明
select: 用于查询操作
insert: 用于插入sql操作
update: 用于更新sql操作
delete: 用于删除sql操作
resultType说明
map: 则数据库查询结果为map
maps: 则数据库查询结果为map数组
array: 则数据库查询结果为值数组
arrays: 则数据库查询结果为多个值数组
struct: 则数据库查询结果为单个结构体
structs: 则数据库查询结果为结构体数组
value: 则数据库查询结果为单个数值

以下是mapper配置示例: mapper/userMapper.xml

<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE mapper PUBLIC "gobatis"
        "https://raw.githubusercontent.com/wenj91/gobatis/master/gobatis.dtd">
<mapper namespace="userMapper">
    <select id="findMapById" resultType="map">
        SELECT id, name FROM user where id=#{id} order by id
    </select>
    <select id="findMapByValue" resultType="map">
            SELECT id, name FROM user where id=#{0} order by id
    </select>
    <select id="findStructByStruct" resultType="struct">
        SELECT id, name, crtTm FROM user where id=#{Id} order by id
    </select>
    <select id="queryStructs" resultType="structs">
        SELECT id, name, crtTm FROM user order by id
    </select>
    <select id="queryStructsByOrder" resultType="structs">
        SELECT id, name, crtTm FROM user order by ${id} desc
    </select>
    <insert id="insertStruct">
        insert into user (name, email, crtTm)
        values (#{Name}, #{Email}, #{CrtTm})
    </insert>
    <delete id="deleteById">
        delete from user where id=#{id}
    </delete>
    <select id="queryStructsByCond" resultType="structs">
         SELECT id, name, crtTm, pwd, email FROM user
         <where>
             <if test="Name != nil and Name != ''">and name = #{Name}</if>
         </where>
         order by id
    </select>
     <select id="queryStructsByCond2" resultType="structs">
         SELECT id, name, crtTm, pwd, email FROM user
         <trim prefixOverrides="and" prefix="where" suffixOverrides="," suffix="and 1=1">
              <if test="Name != nil and Name != ''">and name = #{Name}</if>
         </trim>
         order by id
    </select>
    <update id="updateByCond">
        update user
        <set>
            <if test="Name != nil and Name2 != ''">name = #{Name},</if>
        </set>
        where id = #{Id}
    </update>
</mapper>

使用方法

使用配置文件配置

example1.go

package main

import (
	"fmt"
	_ "github.com/go-sql-driver/mysql" // 引入驱动
	"github.com/wenj91/gobatis"        // 引入gobatis
)

// 实体结构示例， tag：field为数据库对应字段名称
type User struct {
	Id    gobatis.NullInt64  `field:"id"`
	Name  gobatis.NullString `field:"name"`
	Email gobatis.NullString `field:"email"`
	CrtTm gobatis.NullTime   `field:"crtTm"`
}

func main() {
	// 初始化db，参数为db.yml路径，如：db.yml
	gobatis.ConfInit("db.yml")

	// 获取数据源，参数为数据源名称，如：datasource1
	gb := gobatis.NewGoBatis("ds1")

	//传入id查询Map
	mapRes := make(map[string]interface{})
	// stmt标识为：namespace + '.' + id, 如：userMapper.findMapById
	// 查询参数可以是map，也可以是数组，也可以是实体结构
	err := gb.Select("userMapper.findMapById", map[string]interface{}{"id": 1})(mapRes)
	fmt.Println("userMapper.findMapById-->", mapRes, err)

	// 根据传入实体查询对象
	param := User{Id: gobatis.NullInt64{Int64: 1, Valid: true}}
	var structRes *User
	err = gb.Select("userMapper.findStructByStruct", param)(&structRes)
	fmt.Println("userMapper.findStructByStruct-->", structRes, err)

	// 查询实体列表
	structsRes := make([]*User, 0)
	err = gb.Select("userMapper.queryStructs", map[string]interface{}{})(&structsRes)
	fmt.Println("userMapper.queryStructs-->", structsRes, err)

	param = User{
		Id:   gobatis.NullInt64{Int64: 1, Valid: true},
		Name: gobatis.NullString{String: "wenj1993", Valid: true},
	}

	// set tag
	affected, err := gb.Update("userMapper.updateByCond", param)
	fmt.Println("updateByCond:", affected, err)

	param = User{Name: gobatis.NullString{String: "wenj1993", Valid: true}}
	// where tag
	res := make([]*User, 0)
	err = gb.Select("userMapper.queryStructsByCond", param)(&res)
	fmt.Println("queryStructsByCond", res, err)

	// trim tag
	res = make([]*User, 0)
	err = gb.Select("userMapper.queryStructsByCond2", param)(&res)
	fmt.Println("queryStructsByCond2", res, err)
	
	// ${id}
	res = make([]*User, 0)
	err = gb.Select("userMapper.queryStructsByOrder", map[string]interface{}{
		"id":"id",
	})(&res)
	fmt.Println("queryStructsByCond", res, err)

	// 开启事务示例
	tx, _ := gb.Begin()
	defer tx.Rollback()
	tx.Select("userMapper.findMapById", map[string]interface{}{"id": 1,})(mapRes)
	fmt.Println("tx userMapper.findMapById-->", mapRes, err)
	tx.Commit()
}

代码配置方式

example2.go

package main

import (
	"fmt"
	_ "github.com/go-sql-driver/mysql" // 引入驱动
	"github.com/wenj91/gobatis"        // 引入gobatis
)

// 实体结构示例， tag：field为数据库对应字段名称
type User struct {
	Id    gobatis.NullInt64  `field:"id"`
	Name  gobatis.NullString `field:"name"`
	Email gobatis.NullString `field:"email"`
	CrtTm gobatis.NullTime   `field:"crtTm"`
}

func main() {
	// 初始化db
	ds := gobatis.NewDataSource()
	ds.DataSource = "ds1"
	ds.DriverName = "mysql"
	ds.DataSourceName = "root:123456@tcp(127.0.0.1:3306)/test?charset=utf8"
	ds.MaxLifeTime = 120
	ds.MaxOpenConns = 10
	ds.MaxIdleConns = 5
	dbconf := gobatis.NewDbConfig()
	dbconf.DB = []*gobatis.DataSource{ds}
	dbconf.ShowSql = true
	dbconf.Mappers = []string{"mapper/userMapper.xml"}

	gobatis.ConfCodeInit(dbconf)

	// 获取数据源，参数为数据源名称，如：ds1
	gb := gobatis.NewGoBatis("ds1")

	//传入id查询Map
	mapRes := make(map[string]interface{})
	// stmt标识为：namespace + '.' + id, 如：userMapper.findMapById
	// 查询参数可以是map，也可以是数组，也可以是实体结构
	err := gb.Select("userMapper.findMapById", map[string]interface{}{"id": 1})(mapRes)
	fmt.Println("userMapper.findMapById-->", mapRes, err)

	// 根据传入实体查询对象
	param := User{Id: gobatis.NullInt64{Int64: 1, Valid: true}}
	var structRes *User
	err = gb.Select("userMapper.findStructByStruct", param)(&structRes)
	fmt.Println("userMapper.findStructByStruct-->", structRes, err)

	// 查询实体列表
	structsRes := make([]*User, 0)
	err = gb.Select("userMapper.queryStructs", map[string]interface{}{})(&structsRes)
	fmt.Println("userMapper.queryStructs-->", structsRes, err)

	param = User{
		Id:   gobatis.NullInt64{Int64: 1, Valid: true},
		Name: gobatis.NullString{String: "wenj1993", Valid: true},
	}

	// set tag
	affected, err := gb.Update("userMapper.updateByCond", param)
	fmt.Println("updateByCond:", affected, err)

	param = User{Name: gobatis.NullString{String: "wenj1993", Valid: true}}
	// where tag
	res := make([]*User, 0)
	err = gb.Select("userMapper.queryStructsByCond", param)(&res)
	fmt.Println("queryStructsByCond", res, err)

	// trim tag
	res = make([]*User, 0)
	err = gb.Select("userMapper.queryStructsByCond2", param)(&res)
	fmt.Println("queryStructsByCond2", res, err)
	
	// ${id}
	res = make([]*User, 0)
	err = gb.Select("userMapper.queryStructsByOrder", map[string]interface{}{
		"id":"id",
	})(&res)
	fmt.Println("queryStructsByCond", res, err)

	// 开启事务示例
	tx, _ := gb.Begin()
	defer tx.Rollback()
	tx.Select("userMapper.findMapById", map[string]interface{}{"id": 1,})(mapRes)
	fmt.Println("tx userMapper.findMapById-->", mapRes, err)
	tx.Commit()
}

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gobatis-1's Introduction

gobatis

db数据源配置

示例

使用方法

使用配置文件配置

代码配置方式

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