inventory connect related items

inventory.scala

  /**
   * Add a related item, it connects both items on both sides of the relationship
   */
  def connectRelatedBothWays(originKey: Long, relatedKey: Long) = {
    connectRelated(originKey, relatedKey)
    connectRelated(relatedKey, originKey)
  }
  /**
   * Add a related item
   */
  private def connectRelated(originKey: Long, relatedKey: Long) = {
    val origin = Inventory.find(
      By(Inventory.id, originKey)
    )

    val related = Inventory.find(
      By(Inventory.id, relatedKey)
    )
    log.debug("we are saving %s and %s".format(origin, related))
    for {
      orig <- origin
      rela <- related
    } yield connectItem(orig, rela)
  }

  /**
   * Add a "key" to the related item, but check for existing values
   */
  private def connectItem(o: Inventory, r: Inventory) = {
    val key = Helpers.nextFuncName
    (o.relatedKey.is, r.relatedKey.is) match {
      case ("", "") =>
        o.relatedKey(key).save
        r.relatedKey(key).save
      case (orig, "") =>
        r.relatedKey(orig).save
      case ("", related) =>
        o.relatedKey(related).save
      case (orig, related) =>
        r.relatedKey(orig).save
    }
  }