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mysql.go
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mysql.go
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package utils
import (
"database/sql"
"fmt"
"log"
"os"
"time"
"gorm.io/driver/mysql"
"gorm.io/gorm"
"gorm.io/gorm/logger"
)
// 连接配置
type MysqlOptions struct {
User string //"root"
Port int32 //3306
MaxOpen int //100
MinIdle int //20
}
// mysql实例
type Mysql struct {
DB *gorm.DB
}
// 新建实例
func NewMysql(host, passwd, dbname string, options ...MysqlOptions) (m Mysql, err error) {
//默认配置
cfg := MysqlOptions{
User: "root",
Port: 3306,
MaxOpen: 100,
MinIdle: 20,
}
//自定义配置
if len(options) > 0 {
if options[0].User != "" {
cfg.User = options[0].User
}
if options[0].Port > 0 {
cfg.Port = options[0].Port
}
if options[0].MaxOpen > 0 {
cfg.MaxOpen = options[0].MaxOpen
}
if options[0].MinIdle > 0 {
cfg.MinIdle = options[0].MinIdle
}
}
dsn := fmt.Sprintf("%s:%s@tcp(%s:%d)/%s?charset=utf8mb4&parseTime=True&loc=Local",
cfg.User,
passwd,
host,
cfg.Port,
dbname)
if m.DB, err = gorm.Open(mysql.New(mysql.Config{
DSN: dsn,
DefaultStringSize: 256,
DisableDatetimePrecision: true,
DontSupportRenameIndex: true,
DontSupportRenameColumn: true,
SkipInitializeWithVersion: false,
}), &gorm.Config{
CreateBatchSize: 100, //分批插入
Logger: logger.New(
log.New(os.Stdout, "\r\n", log.LstdFlags),
logger.Config{
SlowThreshold: time.Second,
LogLevel: logger.Error,
IgnoreRecordNotFoundError: true,
Colorful: false,
},
),
}); err != nil {
return
}
//连接池
var sqlDB *sql.DB
if sqlDB, err = m.DB.DB(); err != nil {
return
} else {
sqlDB.SetMaxOpenConns(cfg.MaxOpen)
sqlDB.SetMaxIdleConns(cfg.MinIdle)
}
return
}