Using managed compositions for Order.Items (#273)

* Using managed compositions for Order.Items
Co-authored-by: sjvans <30337871+sjvans@users.noreply.github.com>

bookstore/srv/mashup.cds

@@ -20,9 +20,11 @@ extend Books with {
 //
 //  Extend Orders with Books as Products
 //
-using { sap.capire.orders.Orders_Items } from '@capire/orders';
-extend Orders_Items with {
-  book : Association to Books on product.ID = book.ID
+using { sap.capire.orders.Orders } from '@capire/orders';
+extend Orders with {
+  extend Items with {
+    book : Association to Books on product.ID = book.ID
+  }
 }
 
 

orders/app/fiori.cds

@@ -68,7 +68,7 @@ annotate OrdersService.Orders with @(
 
 
 
-annotate OrdersService.Orders_Items with @(
+annotate OrdersService.Orders.Items with @(
 	UI: {
 		LineItem: [
 			{Value: product_ID, Label:'Product ID'},

orders/db/schema.cds

@@ -3,27 +3,22 @@ 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;
+  Items    : Composition of many {
+    key ID    : UUID;
+    product   : Association to Products;
+    quantity  : Integer;
+    title     : String; //> intentionally replicated as snapshot from product.title
+    price     : Double; //> materialized calculated field
+  };
   buyer    : User;
   currency : Currency;
 }
 
-entity Orders_Items {
-  key ID    : UUID;
-  up_       : Association to Orders;
-  product   : Association to Products;
-  quantity  : Integer;
-  title     : String; //> intentionally replicated as snapshot from product.title
-  price     : Double;
-}
-
 /** This is a stand-in for arbitrary ordered Products */
 entity Products @(cds.persistence.skip:'always') {
   key ID : String;
 }
 
 
-
-
 // this is to ensure we have filled-in currencies
 using from '@capire/common';

orders/package.json

@@ -2,6 +2,7 @@
   "name": "@capire/orders",
   "version": "1.0.0",
   "dependencies": {
+    "@capire/common": "*",
     "@sap/cds": "^5"
   }
 }

orders/srv/orders-service.js

@@ -3,7 +3,7 @@ class OrdersService extends cds.ApplicationService {
 
   /** register custom handlers */
   init(){
-    const { Orders_Items:OrderItems } = this.entities
+    const { 'Orders.Items':OrderItems } = this.entities
 
     this.before ('UPDATE', 'Orders', async function(req) {
       const { ID, Items } = req.data

test/hierarchical-data.test.js

@@ -1,8 +1,6 @@
 const cds = require('@sap/cds/lib')
 const {expect} = cds.test
 
-const { parse:cdr } = cds.ql
-
 // should become cds.compile(...) when cds5 is released
 const model = cds.compile.to.csn (`
   entity Categories {
@@ -78,9 +76,7 @@ describe('Hierarchical Data', ()=>{
       { ID:101, name:'Cat' },
       { ID:108, name:'Catweazle' }
 		]
-    return 'skipped as this will be fixed in a newer cds version'
-		if (cdr) expect ( await SELECT.from(Cats) ).to.containSubset (expected)
-		else expect ( await SELECT.from(Cats) ).to.eql (expected)
+		expect ( await SELECT`ID,name`.from(Cats) ).to.eql (expected)
 	})
 
 })