モデル
comable-core に定義されている各種モデルを図にすると次のようになります（図中の線は1:1の関連を、矢印付きの線は1:多の関連を示します）。
graph LR;
Order --> Shipment;
Shipment --> ShipmentItem;
Order --- Payment;
Order -- bill_address --- Address;
Order -- ship_address --- Address;
Order --> OrderItem;
OrderItem --> Variant;
Product --> Variant;
Variant --> Stock;
Variant --> OptionValue;
OptionValue --> Variant;
OptionType --> OptionValue;
Stock --> ShipmentItem;
StockLocation --> Stock;
Product --> Category;
Category --> Product;
Product --> Image;
User -- bill_address --- Address;
User -- ship_address --- Address;
User --> Order;
ShipmentMethod --> Shipment;
PaymentMethod --> Payment;
Navigation --> NagigationItem;
Store;
Tracker;
Theme;
Page;