Unidom Price 价格领域模型引擎

Unidom (UNIfied Domain Object Model) is a series of domain model engines. The Price domain model engine includes Pricing and its relative models. Unidom (统一领域对象模型)是一系列的领域模型引擎。价格领域模型引擎包括定价及其相关的模型。

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Usage in Gemfile

gem 'unidom-price'

Run the Database Migration

rake db:migrate

The migration versions start with 200203.

Call the Model

# Create 2 Prices for the same product
product = Product.create name: 'iPhone 6S'
pricer  = Person.create  name: 'John'
price   = Unidom::Price::Price.create(priced: product,
  pricer:           pricer,
  calculation_code: 'AMNT',
  pricing_code:     'BASE',
  charging_code:    'ONCE',
  currency_code:    'RMB',
  amount:           20.00,
  description:      'the normal price',
  instruction:      'Here is a promotion coming soon.',
  opened_at:        Time.now)
promotion_price = Unidom::Price::Price.create(priced: product,
  pricer:           pricer,
  calculation_code: 'PCNT',
  pricing_code:     'DSCT',
  charging_code:    'ONCE',
  currency_code:    'RMB',
  amount:           15.00,
  description:      'the promotion price',
  instruction:      'Here is a promotion coming 1 week later.',
  opened_at:        Time.now+7.days)

# Find the prices.
prices = Unidom::Price::Price.priced_is(product).priced_by(pricer).charging_coded_as('ONCE').currency_coded_as('RMB').valid_at.alive.first

# Price a product
Unidom::Price::Price.price! product, amount: 100

Include the Concerns

include Unidom::Price::Concerns::AsPriced
include Unidom::Price::Concerns::AsPricer

As Priced

The As Priced concern do the following tasks for the includer automatically:

Define the has_many :prices macro as: has_many :prices, class_name: 'Unidom::Price::Price', as: :priced

As Pricer

The As Priced concern do the following tasks for the includer automatically:

Define the has_many :pricings macro as: has_many :pricings, class_name: 'Unidom::Price::Price', as: :pricer