在网上查了很久，现有的资料已经不适配最新的版本

gorm的logger需要实现gorm自己的接口：

Logger logger.Interface

// Interface logger interface
type Interface interface {
    LogMode(LogLevel) Interface
    Info(context.Context, string, ...interface{})
    Warn(context.Context, string, ...interface{})
    Error(context.Context, string, ...interface{})
    Trace(ctx context.Context, begin time.Time, fc func() (sql string, rowsAffected int64), err error)
}

分别是初始化、三种日志级别、和sql追踪

我的代码如下：

logger.go

// gorm使用的logger的初始化

var (
    MyGormLogger *GormLogger
)

func init() {
    MyGormLogger = &GormLogger{
       logger:        logrus.New(),
       SlowThreshold: 200 * time.Millisecond,
    }
    MyGormLogger.logger.SetLevel(logrus.InfoLevel)
    // 日志输出到文件和控制台
    fileGorm, err := os.OpenFile("log/gorm.log", os.O_CREATE|os.O_WRONLY|os.O_APPEND, 0666)
    if err != nil {
       MyGormLogger.logger.Fatal("gorm日志启动失败", err)
    }
    MyGormLogger.logger.SetOutput(io.MultiWriter(os.Stdout, fileGorm))
    MyGormLogger.logger.SetReportCaller(true)
}

// GormLogger Gorm使用的logger
type GormLogger struct {
    logger        *logrus.Logger
    SlowThreshold time.Duration
}

// LogMode log mode
func (l *GormLogger) LogMode(level gormlogger.LogLevel) gormlogger.Interface {
    // Set the Logrus log level
    newLogger := *l
    switch level {
    case gormlogger.Silent:
       newLogger.logger.SetLevel(logrus.PanicLevel)
    case gormlogger.Error:
       newLogger.logger.SetLevel(logrus.ErrorLevel)
    case gormlogger.Warn:
       newLogger.logger.SetLevel(logrus.WarnLevel)
    case gormlogger.Info:
       newLogger.logger.SetLevel(logrus.InfoLevel)
    default:
       newLogger.logger.SetLevel(logrus.InfoLevel)
    }
    return &newLogger
}

// Info print info
func (l *GormLogger) Info(ctx context.Context, msg string, data ...interface{}) {
    fileLine := gormUtils.FileWithLineNum()
    l.logger.Infof("%s "+msg, append([]interface{}{fileLine}, data...)...)
}

// Warn print warn messages
func (l *GormLogger) Warn(ctx context.Context, msg string, data ...interface{}) {
    fileLine := gormUtils.FileWithLineNum()
    l.logger.Warnf("%s "+msg, append([]interface{}{fileLine}, data...)...)
}

// Error print error messages
func (l *GormLogger) Error(ctx context.Context, msg string, data ...interface{}) {
    fileLine := gormUtils.FileWithLineNum()
    l.logger.Errorf("%s "+msg, append([]interface{}{fileLine}, data...)...)
}

// Trace print sql message
func (l *GormLogger) Trace(ctx context.Context, begin time.Time, fc func() (string, int64), err error) {
    elapsed := time.Since(begin)
    sql, rows := fc()

    if err != nil {
       l.logger.Errorf("trace: %s, [rows:%d] %s, error: %v", elapsed, rows, sql, err)
    } else if elapsed > l.SlowThreshold && l.SlowThreshold != 0 {
       // 慢查询日志
       slowLog := fmt.Sprintf("SLOW SQL >= %v", l.SlowThreshold)
       if rows == -1 {
          l.logger.Warnf("trace: %s, %s, [rows:-] %s", elapsed, slowLog, sql)
       } else {
          l.logger.Warnf("trace: %s, %s, [rows:%d] %s", elapsed, slowLog, rows, sql)
       }
    } else {
       // 普通信息级别日志
       l.logger.Infof("trace: %s, [rows:%d] %s", elapsed, rows, sql)
    }
}