Go patterns

patterns.go

func something(id uint, wg *sync.WaitGroup, errChan chan error) error {
	if wg != nil {
		defer wg.Done()
	}

	err := func(id uint) error {
		var user models.User
		if err := db.First(&user, id).Error; err != nil {
			return errors.WithStack(err)
		}
	}(id)

	if err != nil && errChan != nil {
		errChan <- nil
	}

	return err
}

func somethingOuter(id uint, wg *sync.WaitGroup, errChan chan error) error {
	if wg != nil {
		defer wg.Done()
	}

  err := somethingInner(id)

	if err != nil && errChan != nil {
		errChan <- nil
	}

	return err
}

func somethingInner(id uint) error {
	var user models.User
	if err := db.First(&user, id).Error; err != nil {
		return errors.WithStack(err)
	}
}