Cold_Api/initialize/db.go

package initialize

import (
	"Cold_Api/conf"
	_ "github.com/go-sql-driver/mysql"

	"fmt"
	"log"
	"time"

	"gorm.io/gorm/logger"

	"github.com/beego/beego/v2/core/logs"
	beego "github.com/beego/beego/v2/server/web"
	"gorm.io/driver/mysql"
	"gorm.io/gorm"
)

var DB *gorm.DB

var Err error

// 重写gorm日志的Writer
type Writer struct {
}

func (w Writer) Printf(format string, args ...interface{}) {
	// log.Infof(format, args...)
	logs.Notice(format, args...)
}

// 设置psql
func init() {
	log.Println("连接数据库...")

	sqlloglevel, err := beego.AppConfig.Int("sqlloglevel")
	if err != nil {
		log.Fatalf("无法获取sqlloglevel: %v", err)
	}
	slow_threshold, err := beego.AppConfig.Int("slow_threshold")
	if err != nil {
		log.Fatalf("无法获取slow_threshold: %v", err)
	}

	dataSource := fmt.Sprintf("%s:%s@tcp(%s)/%s?charset=utf8mb4&parseTime=True&loc=Local",
		conf.MysqlServer_Username,
		conf.MysqlServer_Password,
		conf.MysqlServer_UrlPort,
		conf.MysqlServer_Database,
	)

	//设置gorm日志规则
	newLogger := logger.New(
		// log.New(os.Stdout, "\r\n", log.LstdFlags), // io writer 单独设置grom日志输出
		Writer{}, // beego日志info输出
		logger.Config{
			SlowThreshold:             time.Duration(slow_threshold) * time.Millisecond, // Slow SQL threshold
			LogLevel:                  logger.LogLevel(sqlloglevel),                     // Log level
			IgnoreRecordNotFoundError: true,                                             // Ignore ErrRecordNotFound error for logger
			Colorful:                  true,                                             // Disable color
		},
	)

	DB, Err = gorm.Open(mysql.Open(dataSource), &gorm.Config{
		DisableForeignKeyConstraintWhenMigrating: true, // 禁用外键
		Logger:                                   newLogger,
		DisableAutomaticPing:                     true,
	})

	if Err != nil {
		log.Fatalf("连接数据库失败: %v", Err)
	}

	SqlDB, err2 := DB.DB()
	if err2 != nil {
		log.Fatalf("连接数据库失败: %v", err2)
	}

	SqlDB.SetMaxIdleConns(conf.MysqlServer_MaxIdleConnections)
	SqlDB.SetMaxOpenConns(conf.MysqlServer_MaxOpenConnections)
	SqlDB.SetConnMaxLifetime(time.Hour)

	log.Println("连接数据库完成...")
}