revised

packages/bookshop/srv/external.cds

@@ -0,0 +1,76 @@
+using { API_BUSINESS_PARTNER as external } from './external/API_BUSINESS_PARTNER.csn';
+
+/**
+ * Tailor the imported API to our needs...
+ */
+extend service API_BUSINESS_PARTNER with {
+
+  /**
+   * Simplified view on external addresses
+   */
+  entity Addresses as projection on external.A_BusinessPartnerAddress {
+    key AddressID as ID,
+    key BusinessPartner,
+    Country as country,
+    CityName as cityName,
+    PostalCode as postalCode,
+    StreetName as streetName,
+    HouseNumber as houseNumber
+  };
+
+  /**
+   * Re-modelling the event which is currently not available declaratively from S/4
+   */
+  // @messaging.topic:'sap/S4HANAOD/c532/BO/BusinessPartner/Changed'
+  // event "BusinessPartner/Changed" {
+  //   "KEY": array of {
+  //     BUSINESSPARTNER : external.A_BusinessPartner.BusinessPartner
+  //   }
+  // }
+}
+
+
+/**
+ * Mashup w/ services to also serve shipping addresses
+ */
+using { AdminService } from './admin-service';
+extend service AdminService {
+  entity usersAddresses as projection on bookshop.Addresses;
+}
+
+using { CatalogService } from './cat-service';
+extend service CatalogService {
+  @readonly @requires:'authenticated-user'
+  entity usersAddresses as projection on bookshop.Addresses;
+}
+
+
+/**
+ * Mashup w/ domain model for federated data access
+ */
+using { sap.capire.bookshop } from '../db/schema';
+
+/**
+ * Extend Orders to maintain references to (replicated) external Addresses
+ */
+extend bookshop.Orders with {
+  shippingAddress : Association to bookshop.Addresses;
+}
+
+/**
+ * Add an entity to replicate external address data for quick access,
+ * e.g. when displaying lists of orders.
+ */
+@cds.persistence:{table,skip:false}
+entity sap.capire.bookshop.Addresses as SELECT from external.Addresses { *,
+  false as tombstone : Boolean
+};
+// entity sap.capire.bookshop.Addresses as SELECT from external.A_BusinessPartnerAddress {
+//   key AddressID as ID,
+//   key BusinessPartner,
+//   Country as country,
+//   CityName as cityName,
+//   PostalCode as postalCode,
+//   StreetName as streetName,
+//   HouseNumber as houseNumber
+// };