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
- 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/youkale/gobatis/master/gobatis.dtd">
<mapper namespace="userMapper">
<select id="findMapById" resultType="struct">
SELECT * FROM user where id=#{id} order by id
</select>
<select id="findMapByValue" resultType="map">
SELECT * FROM user where id=1 order by id
</select>
<select id="findMapByValues" resultType="maps">
SELECT * FROM user order by id
</select>
<select id="findSliceByValue" resultType="slice">
SELECT id FROM user where id=1 order by id
</select>
<select id="findSlicesByValue" resultType="slices">
SELECT * FROM user order by id
</select>
<select id="findArrayByValue" resultType="array">
SELECT * FROM user where id=1 order by id
</select>
<select id="findValueByValue" resultType="value">
SELECT id FROM user where id=1 order by id
</select>
<select id="findStructByStruct" resultType="struct">
SELECT id, user_name, password FROM user where id=#{Id} order by id
</select>
<select id="findById" resultType="struct">
SELECT * FROM user where id=#{id} order by id
</select>
<select id="queryStructs" resultType="structs">
SELECT * FROM user order by id
</select>
<select id="queryStructsByCond" resultType="structs">
SELECT id, user_name, password, pwd, email FROM user
<where>
<if test="Name != nil and Name != ''">and user_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 user_name = #{Name}</if>
</trim>
order by id
</select>
<select id="queryStructsByCond3" resultType="structs">
SELECT id, name, crtTm, pwd, email FROM user
<trim prefixOverrides="and" prefix="where" suffixOverrides="," suffix="and 1=1">
<choose>
<when test="Age % 3 == 0">
and age = #{Age}
</when>
<when test="Age % 2 == 0 ">
and age = #{Age}
</when>
<otherwise>
and name = 'otherwise'
</otherwise>
</choose>
<if test="Name != nil and Name != ''">and name = #{Name}</if>
<if test="Password % 2 == 0 ">and pwd = #{Password} </if>
</trim>
order by id
</select>
<update id="updateByCond">
update user
<set>
<if test="Name != nil and Name2 != ''">name = #{Name},</if>
<if test="Password != nil and Password != ''">pwd = #{Password},</if>
</set>
where id = #{Id}
</update>
<insert id="saveUser">
insert into user (user_name, age, addr)
values (#{Name}, #{Email}, #{CrtTm})
</insert>
<delete id="deleteById">
delete from user where id=#{id}
</delete>
</mapper>使用方法
example.go
package main
import (
"context"
"database/sql"
"fmt"
_ "github.com/go-sql-driver/mysql"
"github.com/youkale/gobatis"
)
type User struct {
Id int64
UserName string
Age int8
Addr gobatis.NullString
Passwd string
IsDisable bool
Money gobatis.NullFloat64
Total float64
}
func main() {
db, err := sql.Open("mysql",
"root:toor@tcp(127.0.0.1:3306)/gobatis")
if nil != err {
panic(err)
}
err = db.Ping()
if nil != err {
panic(err)
}
config := &gobatis.Config{
Db: db,
MapperPaths: []string{"./examples/mapper"},
Debug:true,
ColumnStyle:[]int{gobatis.StyleSnake},
}
batis, err := gobatis.NewGoBatis(context.Background(), config)
if nil != err {
panic(err)
}
u := User{}
err = batis.Select("userMapper.findMapById", map[string]interface{}{"id": 1})(&u)
fmt.Printf("%v, error%v\n", u, err)
var us []User
_ = batis.Select("userMapper.queryStructs", map[string]interface{}{})(&us)
fmt.Printf("%v\n", us)
m := make(map[string]interface{})
err = batis.Select("userMapper.findMapByValue",map[string]interface{}{})(&m)
fmt.Printf("%v, err %v", m,err)
var ms []map[string]interface{}
err = batis.Select("userMapper.findMapByValues",map[string]interface{}{})(&ms)
fmt.Printf("%v",ms)
var ss []interface{}
err = batis.Select("userMapper.findSliceByValue",map[string]interface{}{})(&ss)
fmt.Printf("%v,%v",ss,err)
var sss [][]interface{}
err = batis.Select("userMapper.findSlicesByValue",map[string]interface{}{})(&sss)
fmt.Printf("%v,%v",sss,err)
var ar []interface{}
err = batis.Select("userMapper.findArrayByValue",map[string]interface{}{})(&ar)
fmt.Printf("%v,%v",ar,err)
var ars []interface{}
err = batis.Select("userMapper.findArraysByValue",map[string]interface{}{})(&ars)
fmt.Printf("%v,%v",ars,err)
var v int
err = batis.Select("userMapper.findValueByValue",map[string]interface{}{})(&v)
fmt.Printf("%v,%v\n",v,err)
sean := User{}
sean.Addr = gobatis.NullString{String:"火星"}
sean.Age = 22
sean.IsDisable = true
sean.Money= gobatis.NullFloat64{
Float64:10000.00,
}
sean.Passwd = "password"
sean.Total = 1.22
sean.UserName = "sean"
runner, err := batis.Begin()
i, i2, err := runner.Insert("userMapper.save", &sean)
fmt.Printf("%v/%v/%v\n",i,i2,err)
err = runner.Commit()
begin, _ := batis.Begin()
sean.Id = i
sean.UserName = "sdfsdfs"
update, _ := begin.Update("userMapper.updateById", &sean)
err = begin.Commit()
fmt.Printf("%v/%v",update,err)
i3, err := batis.Delete("userMapper.deleteById", &sean)
fmt.Printf("%v//%v",i3,err)
}