code: func (colorVariation ColorVariation) ViewPath() string {
  	defaultPath := ""
  	var product Product
  	if !db.DB.First(&product, "id = ?", colorVariation.ProductID).RecordNotFound() {
  		defaultPath = fmt.Sprintf("/products/%s_%s", product.Code, colorVariation.ColorCode)
  	}
  	return defaultPath
  }
docs: // ViewPath view path of color variation