fonchain-approval-fork/pkg/model/init.go

package model

import (
	"fmt"
	"strings"
	"time"

	"github.com/fonchain_enterprise/fonchain-approval/pkg/m"
	"github.com/gin-gonic/gin"
	"gopkg.in/ini.v1"
	"gorm.io/driver/mysql"
	"gorm.io/gorm"
	"gorm.io/gorm/logger"
	"gorm.io/gorm/schema"
)

var DB *gorm.DB

var (
	Db         string
	DbHost     string
	DbPort     string
	DbUser     string
	DbPassWord string
	DbName     string
)

func init() {
	//从本地读取环境变量
	file, err := ini.Load(m.SERVER_CONFIG)
	if err != nil {
		fmt.Println(m.ERRORCONFIG, err)
	}
	//加载数据库配置
	LoadMysqlData(file)

	//MySQL数据库
	path := strings.Join([]string{DbUser, ":", DbPassWord, "@tcp(", DbHost, ":", DbPort, ")/", DbName, "?charset=utf8&parseTime=true&loc=Local"}, "")
	//连接数据库
	Database(path)
}

func LoadMysqlData(file *ini.File) {
	Db = file.Section("mysql").Key("Db").String()
	DbHost = file.Section("mysql").Key("DbHost").String()
	DbPort = file.Section("mysql").Key("DbPort").String()
	DbUser = file.Section("mysql").Key("DbUser").String()
	DbPassWord = file.Section("mysql").Key("DbPassWord").String()
	DbName = file.Section("mysql").Key("DbName").String()
}

func Database(conn string) {
	var ormLogger logger.Interface
	if gin.Mode() == "debug" {
		ormLogger = logger.Default.LogMode(logger.Info)
	} else {
		ormLogger = logger.Default
	}
	db, err := gorm.Open(mysql.New(mysql.Config{
		DSN:                       conn,  // DSN data source name
		DefaultStringSize:         256,   // string 类型字段的默认长度
		DisableDatetimePrecision:  true,  // 禁用 datetime 精度，MySQL 5.6 之前的数据库不支持
		DontSupportRenameIndex:    true,  // 重命名索引时采用删除并新建的方式，MySQL 5.7 之前的数据库和 MariaDB 不支持重命名索引
		DontSupportRenameColumn:   true,  // 用 `change` 重命名列，MySQL 8 之前的数据库和 MariaDB 不支持重命名列
		SkipInitializeWithVersion: false, // 根据版本自动配置
	}), &gorm.Config{
		Logger: ormLogger,
		NamingStrategy: schema.NamingStrategy{
			SingularTable: true,
		},
	})
	if err != nil {
		panic(err)
	}
	sqlDB, _ := db.DB()
	sqlDB.SetMaxIdleConns(20)  //设置连接池，空闲
	sqlDB.SetMaxOpenConns(100) //打开
	sqlDB.SetConnMaxLifetime(time.Second * 30)
	DB = db
}