Investigated issues

orders/db/schema.cds-

@@ -0,0 +1,26 @@
+using { Currency, User, managed, cuid } from '@sap/cds/common';
+using from '@capire/common';
+namespace sap.capire.orders;
+
+entity Orders : cuid, managed {
+  OrderNo  : String @title:'Order Number'; //> readable key
+  Items    : Composition of many Orders_Items on Items.up_ = $self;
+  buyer    : User;
+  currency : Currency;
+}
+
+entity Orders_Items {
+  up_       : Association to Orders not null;  //> IMPORTANT for Draft: not key(!)
+  key ID    : UUID;
+  @assert.integrity:false // REVISIT: this is a temporary workaround for a glitch in cds-runtime
+  product   : Association to Products;
+  amount    : Integer;
+  title     : String;
+  price     : Double;
+}
+
+/** This is a stand-in for arbitrary ordered Products */
+@cds.persistence.skip:'always'
+entity Products {
+  key ID : String;
+}