foodsoft/app/models/article_price.rb

class ArticlePrice < ApplicationRecord
  include LocalizeInput
  include PriceCalculation

  # @!attribute price
  #   @return [Number] Net price
  #   @see Article#price
  # @!attribute tax
  #   @return [Number] VAT percentage
  #   @see Article#tax
  # @!attribute deposit
  #   @return [Number] Deposit
  #   @see Article#deposit
  # @!attribute unit_quantity
  #   @return [Number] Number of units in wholesale package (box).
  #   @see Article#unit
  #   @see Article#unit_quantity
  # @!attribute article
  #   @return [Article] Article this price is about.
  belongs_to :article
  # @!attribute order_articles
  #   @return [Array<OrderArticle>] Order articles this price is associated with.
  has_many :order_articles

  localize_input_of :price, :tax, :deposit

  validates_presence_of :price, :tax, :deposit, :unit_quantity
  validates_numericality_of :price, :greater_than_or_equal_to => 0
  validates_numericality_of :unit_quantity, :greater_than => 0
  validates_numericality_of :deposit, :tax
end