Unidom Shopping 购物领域模型引擎

Unidom (UNIfied Domain Object Model) is a series of domain model engines. The Shopping domain model engine includes Shopping Cart and Shopping Item models. Unidom (统一领域对象模型)是一系列的领域模型引擎。购物领域模型引擎包括购物车和购物项的模型。

Recent Update

Check out the Road Map to find out what's the next. Check out the Change Log to find out what's new.

Usage in Gemfile

gem 'unidom-shopping'

Run the Database Migration

rake db:migrate

The migration versions start with 200205.

Call the Model

# Create Shopping Cart
lady = Party.create name: 'Ann'
shop = Shop.create  name: 'WalMart'
shopping_cart = Unidom::Shopping::ShoppingCart.create shopper: lady, shop: shop, opened_at: Time.now

# Add Products into Shopping Cart
fish = Product.create name: 'Fish'
ball = Prdduct.create name: 'Ball'
shopping_cart.items.create! shopper: lady, shopped: fish, unit_price: 39.96, quantity: 2, opened_at: Time.now
shopping_cart.items.create! shopper: lady, shopped: ball, unit_price: 19.99, quantity: 1, opened_at: Time.now
# or
shopping_cart.add! fish, unit_price: 39.96, quantity: 2, at: Time.now
shopping_cart.add! ball, unit_price: 19.99

# Find the Shopping Cart
shopping_cart = Unidom::Shopping::ShoppingCart.shopped_by(lady).shop_is(shop).valid_at.alive.first
shopping_cart.items.valid_at.alive # fish & ball

Include the Concerns

include Unidom::Shopping::Concerns::AsCartShopper
include Unidom::Shopping::Concerns::AsItemShopper
include Unidom::Shopping::Concerns::AsShop
include Unidom::Shopping::Concerns::AsShopped

As Cart Shopper

The As Cart Shopper concern do the following tasks for the includer automatically:

Define the has_many :shopping_carts macro as: has_many :shopping_carts, class_name: 'Unidom::Shopping::ShoppingCart', as: :shopper
Define the #get_cart! method as: get_cart!(from: nil, at: Time.now)
Define the #get_cart? method as: get_cart?(from: nil, at: Time.now)

As Item Shopper

The As Item Shopper concern do the following tasks for the includer automatically:

Define the has_many :shopping_items macro as: has_many :shopping_items, class_name: 'Unidom::Shopping::ShoppingItem', as: :shopper
Define the #add! method as: add!(it, into: nil, at: Time.now, unit_price: 0, quantity: 1)
Define the #add? method as: add?(it, into: nil, at: Time.now)

As Shop

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

Define the has_many :shopping_carts macro as: has_many :shopping_carts, class_name: 'Unidom::Shopping::ShoppingCart', as: :shop
Define the #get_cart! method as: get_cart!(by: nil, at: Time.now)

As Shopped

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

Define the has_many :shopping_items macro as: has_many :shopping_items, class_name: 'Unidom::Shopping::ShoppingItem', as: :shopped
Define the #is_added! method as: is_added!(into: nil, by: nil, at: Time.now, unit_price: 0, quantity: 1)
Define the #is_added? method as: is_added?(into: nil, by: nil, at: Time.now)

Disable the Model & Migration

If you only need the app components other than models, the migrations should be neglected, and the models should not be loaded.

# config/initializers/unidom.rb
Unidom::Common.configure do |options|

  options[:neglected_namespaces] = %w{
    Unidom::Shopping
  }

end

RSpec examples

RSpec example manifest (run automatically)

# spec/models/unidom_spec.rb
require 'unidom/shopping/models_rspec'

# spec/types/unidom_spec.rb
require 'unidom/shopping/types_rspec'

# spec/validators/unidom_spec.rb
require 'unidom/shopping/validators_rspec'

RSpec shared examples (to be integrated)

# lib/unidom.rb
def initialize_unidom

  Unidom::Party::Person.class_eval do
    include Unidom::Shopping::Concerns::AsCartShopper
    include Unidom::Shopping::Concerns::AsItemShopper
  end

  Unidom::Party::Shop.class_eval do
    include Unidom::Shopping::Concerns::AsShop
  end

  Unidom::Product::Product.class_eval do
    include Unidom::Shopping::Concerns::AsShopped
  end

end

# spec/rails_helper.rb
require 'unidom'
initialize_unidom

# spec/support/unidom_rspec_shared_examples.rb
require 'unidom/shopping/rspec_shared_examples'

# spec/models/unidom/party/person_spec.rb
describe Unidom::Party::Person, type: :model do

  context do

    model_attribtues = {
      name: 'Tim'
    }

    it_behaves_like 'Unidom::Shopping::Concerns::AsCartShopper', model_attribtues
    it_behaves_like 'Unidom::Shopping::Concerns::AsItemShopper', model_attribtues

  end

end

# spec/models/unidom/party/shop_spec.rb
describe Unidom::Party::Shop, type: :model do

  context do

    model_attribtues = {
      name: 'WalMart'
    }

    it_behaves_like 'Unidom::Shopping::Concerns::AsShop', model_attribtues

  end

end

# spec/models/unidom/product/product_spec.rb
describe Unidom::Product::Product, type: :model do

  context do

    model_attribtues = {
      name:             'Model X',
      abbreviation:     'MX',
      measurement_unit: 'set',
      packing_norm:     '1 per 1'
    }

    it_behaves_like 'Unidom::Shopping::Concerns::AsShopped', model_attribtues

  end

end