// Config GORM config
type Config struct {
	// GORM perform single create, update, delete operations in transactions by default to ensure database data integrity
	// You can disable it by setting `SkipDefaultTransaction` to true
	SkipDefaultTransaction    bool
	DefaultTransactionTimeout time.Duration
	DefaultContextTimeout     time.Duration

	// NamingStrategy tables, columns naming strategy
	NamingStrategy schema.Namer

				subtx.callbacks.Create().Execute(subtx)
				if subtx.Error != nil {
					return subtx.Error
				}
				rowsAffected += subtx.RowsAffected
			}
			return nil
		}

		if tx.SkipDefaultTransaction || reflectLen <= batchSize {
			tx.AddError(callFc(tx.Session(&Session{})))
		} else {
			tx.AddError(tx.Transaction(callFc))
		}

		tx.RowsAffected = rowsAffected
	default:
		tx = db.getInstance()