Finalize ToDo's

bookshop/db/handlers/sandbox.cds

@@ -0,0 +1,2 @@
+using from '..\..\schema';
+

bookshop/db/schema.cds

@@ -1,7 +1,14 @@
-using { Currency, managed, sap } from '@sap/cds/common';
+using {
+  Currency,
+  managed,
+  sap,
+  extensible
+} from '@sap/cds/common';
+
 namespace sap.capire.bookshop;
 
-entity Books : managed {
+@Extensibility.Any.Enabled : true
+entity Books : managed, extensible {
   key ID         : Integer;
       title      : localized String(111);
       descr      : localized String(1111);
@@ -11,21 +18,39 @@ entity Books : managed {
       price      : Decimal;
       currency   : Currency;
       image      : LargeBinary @Core.MediaType : 'image/png';
+      authorName : String;
 }
 
-entity Authors : managed {
+
+entity Authors : managed, extensible {
   key ID           : Integer;
       name         : String(111);
       dateOfBirth  : Date;
       dateOfDeath  : Date;
       placeOfBirth : String;
       placeOfDeath : String;
-  books  : Association to many Books on books.author = $self;
+
+      books        : Association to many Books
+                       on books.author = $self;
 }
 
-/** Hierarchically organized Code List for Genres */
+extend Authors with {
+  virtual age : Integer;
+  virtual exampleBook: String;
+}
+
+/**
+ * Hierarchically organized Code List for Genres
+ */
 entity Genres : sap.common.CodeList {
   key ID       : Integer;
       parent   : Association to Genres;
-  children : Composition of many Genres on children.parent = $self;
+      children : Composition of many Genres
+                   on children.parent = $self;
+}
+
+entity Publishers: managed {
+  key ID: Integer;
+  name: String(111);
+
 }

bookshop/handlers/AdminService.Authors.CREATE.js

@@ -0,0 +1,17 @@
+async function run() {
+  //debugger
+  //while (true) {}
+  //process.exit()
+  //1.substring()
+  // let res = await specialselect
+  let res = await SELECT.one`title`.from(`Books`).where(`ID=201`)
+  let { title } = res
+  let Author = req.data
+  //await srv.read('Books')
+  
+  Author.modifiedBy = "Custom Event handler changed this!"
+  Author.placeOfDeath = " --- Somewhere over " + title + " --- create in Sandbox"
+  //await this.emit("createdAuthor", { Author })
+  return Author
+}
+run()

bookshop/handlers/AdminService.Authors.READ.js

@@ -0,0 +1,41 @@
+function getYear(v) {
+  return parseInt(v.substr(0, 4))
+}
+function getMonth(v) {
+  return parseInt(v.substr(5, 2))
+}
+function getDay(v) {
+  return parseInt(v.substr(8, 2))
+}
+
+function getAge(from, to) {
+  if (from === undefined || from == null) return 0
+  if (to === undefined || to == null) to = new Date().toISOString()
+  let year = getYear(to) - getYear(from) - 1
+  if (
+    getMonth(to) > getMonth(from) ||
+    (getMonth(to) === getMonth(from) && getDay(to) >= getDay(from))
+  ) {
+    year++
+  }
+  return year
+}
+
+async function run() {
+  const result_ = Array.isArray(result) ? result : [result]
+  for (const row of result_) {
+    row.age = getAge(row.dateOfBirth, row.dateOfDeath)
+    let res = await SELECT.one`title`.from(`Books`).where({ author_ID: row.ID })
+    if (!res) {
+      res = {}
+    }
+    let { title } = res
+    if (!title) {
+      title = "no Books yet"
+    }
+    row.exampleBook = title
+    //let pub = await SELECT.one`name`.from(`sap_capire_bookshop_Publishers`)
+  }
+}
+
+run()

bookshop/handlers/AdminService.Books.CREATE.js

@@ -0,0 +1,9 @@
+
+async function run() {
+  const {stock, price, author_ID} = req.data
+  if (stock<0) return req.reject('409', 'Stock must not be negative')
+  if (price<0) return req.reject('409', 'Price must not be negative')
+  let {name} = await SELECT.one`name`.from(`Authors`).where({ID: author_ID})
+  req.data.authorName=name
+}
+output = run()

bookshop/handlers/AdminService.Books.READ.js

@@ -0,0 +1,6 @@
+const result_ = Array.isArray(result) ? result : [result];
+for (const row of result_) {
+  if (row.stock > 50) {
+    row.title += " ---Order now for a 10% discount!";
+  }
+}

bookshop/handlers/AdminService.renameAuthor.ON.js

@@ -0,0 +1,9 @@
+async function run() {
+  const {author, newName} = req.data
+  let a = await SELECT `name`.from(`Authors`).where({ID: author})
+  if(!a) return req.error (404, `Can't rename a non-existing author`)
+  await UPDATE (`Authors`,author).with ({ name: newName })
+    //await this.emit ('renamedAuthor', { author, newName })
+  output.msg = 'Success' 
+}
+run()

bookshop/handlers/createdAuthor.ON.js

@@ -0,0 +1,5 @@
+async function run() {
+  let {Author} = req.data
+  Author.placeOfBirth += ' --- modified in custom event' 
+}
+run()

bookshop/notebook.md

@@ -0,0 +1,112 @@
+# Base assumption
+
+Event handlers will always use **publicly available application API's**(services)
+
+- already done in Sandbox API by overwriting **SELECT**, **UPDATE**, **READ** and **CREATE**
+
+## Inbound data for validations
+
+- req.target plus expand on related data
+  - lazy loading on expand
+- event facade could have an explicit publishing of specific services or documents (e.g. remote services)
+- CQN Protocol adapter for subsequent reads --> req.data plus application service calls
+- what is the CDS subset to put in?
+  - req.data + target-rec (proxy, unloaded)
+  - ORM type lazy loading (dereferenced)
+  - application developer could actually provide custom proxies for specific functions
+  - performance impact of multiple accesses to object graph and multiple DB roundtrips
+  - can static code checking or developer annotations influence what is loaded into a graph?
+  - alternative: Stripped-down SELECT limited to req.target and ID
+    - application service only
+    - access rights of user respected
+- What about to-many relationships? For compositions essential, for associations to be questioned
+- Application Service Reads
+- outbound data for changes
+- call remote services
+  - register new remote services dynamically
+  - CAP provides an API on remote services - connect doesn't need to be done by extension developer
+  - alternative: declarative remote services plumbing with CDS service facade
+    - model looks like static internal services, remote calls done transparently behind the scenes
+
+-Emit Events
+
+- choreography of extension points
+  - deep inserts vs. fine grained operations
+  - input validation may be suited for fine grained operations
+  - today not in scope for performance reasons
+  - two different use case: Insert new page to book vs. update order-header with items-constraints in place
+- reject request, return errors and warnings - suitable for UI, too
+
+*/
+
+/*
+Annotations available:
+
+Entity level
+  @expression.constraint : [{if: 'expression evaluates to bool'}, on: ['INSERT, UPDATE, DELETE'], error: 'Transaction Rollback and error message', warning: 'Transaction proceeds and warning message']
+  @expression.computed : [{expression: 'ability to access request payload and modify it', on: ['INSERT, UPDATE']}]
+  @event : [{if: 'expression evaluates to bool', on: ['INSERT, UPDATE, DELETE, READ'], when: 'before or after, default before', emit: 'Event Name', to: 'Messaging target, optional'}]
+  @expresion.code :[{file: 'file name', on:['insert', 'update'], when: 'before or after, default before'},
+                    {source: 'each => { if (each.stock > 111) {each.title += `-- 11% discount!`; each.price= each.price*0.9}', on:['insert', 'update'], when: 'before or after'}]  
+Atribute Level
+  @assert.constraint : {if: 'stock>=0 OR stock <1000', error: 'i18n/error102'};
+  @event : {if: 'expression evaluates to bool', on: ['INSERT, UPDATE, DELETE, READ'], when: 'before or after', emit: 'Event Name', to: 'Messaging target, optional' }
+
+Functions available:
+  EXISTS(association target)
+  COUNT,AVG,MIN,MAX,SUM: Composition items, arrays etc
+  OLD:  before image
+  EACH: loop over composition items
+
+Events covered:
+CRUD --> Longhand and Shorthand supported?
+Upsert as one event?
+Before and after:
+  Before can change change request payload and stop transaction
+  After should trigger only asynchronous messages
+Specific Events for status changes? I think expression based event emitter suffices
+*/
+
+//Entity level annotations
+@expression.constraint : [{if: 'stock>100 AND price>15)', on: ['INSERT', 'UPDATE'], error: 'No Book over price 15 should have more than 100 stock' }, // error, rollback transactions
+{if: 'stock>90 AND price>15)', on: ['I', 'U'], warning: 'No Book over price 15 should have more than 100 stock' }] //warning, proceed with transaction but report warning back to UI
+@expression.computed : {expression: 'if(stock>100) then price=price*0.9', on: ['INSERT']}  //ability to modify the payload of the request, but nothing beyond it
+@expresion.code :[{file: 'sap.capire.bookshop-Books-beforeInsert', on:['insert', 'update'], when: 'before'},  //naming can be arbitrary?
+{source: 'each => { if (each.stock > 111) {each.title += `-- 11% discount!`; each.price= each.price*0.9}', on:['insert', 'update'], when: 'before'}]  //alternative
+@event : { if:'price>200', emit: 'Expensive Book', to: 'RulesEngine'}
+entity Books : managed {
+key ID : Integer;
+title  : localized String(111); @event : {if: 'old.title="Hello"', emit: 'Hello changed' }  //old refers to before Image. No "to" clause means message is emitted to any subscriber interested
+descr  : localized String(1111);
+author : Association to Authors @assert.constraint: 'exists(author)';  //function calls need to evaluate to bool
+genre  : Association to Genres;
+stock  : Integer @assert.constraint : {if: 'stock>=0 OR stock <1000', error: 'Stock not within permitted parameters'}; //when operand is used, no auto-insert
+price  : Decimal(9,2) @assert.constraint : '>0'; //insert operand on left side by default
+currency : Currency;
+image : LargeBinary @Core.MediaType : 'image/png';
+stockWorth: Decimal(9,2) @expression.computed : 'stock*price'; //persisted on write. Overhead in runtime, but performance benefit on read. Payload ignored?
+// stockWorth2 = stock*price;  -- long term goal from compiler team, not persisted on write, but calculated on read
+stockWorth3 : Decimal @expression.computed: 'if (stock*price>1000) then stockWorth3=stock.price else stockworth3=1000';  //which altenative?
+stockWorth4 : Decimal @expression.computed: {if: '(stock*price>1000)', then: 'stockWorth3=stock.price', else: 'stockworth3=1000'};
+}
+//@assert.expression: 'dateOfBirth<dateOfDeath'
+entity Authors : managed {
+key ID : Integer;
+name   : String(111);
+dateOfBirth  : Date ;
+dateOfDeath  : Date @expression.constraint: '>dateOfBirth';
+placeOfBirth : String;
+placeOfDeath : String;
+books  : Association to many Books on books.author = $self;
+}
+
+/** Hierarchically organized Code List for Genres */
+entity Genres : sap.common.CodeList {
+key ID   : Integer;
+parent   : Association to Genres;
+children : Composition of many Genres on children.parent = $self;
+}
+
+```
+
+```

bookshop/package.json

@@ -10,9 +10,10 @@
     "index.js"
   ],
   "dependencies": {
-    "@sap/cds": "^6.1.1",
+    "@sap/cds": ">=5.9",
     "express": "^4.17.1",
-    "passport": ">=0.4.1"
+    "passport": ">=0.4.1",
+    "vm2": ">=3.9.9"
   },
   "scripts": {
     "genres": "cds serve test/genres.cds",
@@ -21,6 +22,7 @@
   },
   "cds": {
     "requires": {
+      "code-extensibility" : true,
       "db": {
         "kind": "sqlite",
         "credentials": {

bookshop/srv/admin-service.cds

@@ -1,5 +1,30 @@
-using { sap.capire.bookshop as my } from '../db/schema';
-service AdminService @(requires:'admin') {
-  entity Books as projection on my.Books;
-  entity Authors as projection on my.Authors;
+using {sap.capire.bookshop as my} from '../db/schema';
+
+service AdminService // @(requires : 'admin')
+{
+  entity Books   as projection on my.Books actions {
+    action   increaseStock(count : Integer);
+    function stock() returns Integer;
+  };
+
+@Extensibility : {
+  Fields.Enabled      : true,
+  Fields.Quota: 100,
+  Relations.Enabled   : false,
+  Annotations.Enabled : true,
+  Logic.Enabled : true,
+  Logic.constraints: true,
+  Logic.calculations: true,
+  Logic.Handler : [create, update, delete, read]
+}
+  entity Authors as projection on my.Authors;
+
+  action renameAuthor(author : Authors:ID, newName : String) returns {
+    msg : String
+  };
+  function getStock(book: Books:ID) returns Integer;
+  event newBook : {
+    book : Books:ID;
+    name : Books:title
+  };
 }

bookshop/srv/admin-service.js

@@ -1,12 +1,135 @@
-const cds = require('@sap/cds')
+const cds = require("@sap/cds")
+//const cds_sandbox = require("sap/cds/sandbox")
+const { VM, VMScript } = require("vm2")
+const fs = require("fs")
+const path = require("path")
+const { nextTick } = require("process")
 
-module.exports = cds.service.impl (function(){
-  this.before ('NEW','Authors', genid)
-  this.before ('NEW','Books', genid)
-})
+class AdminService extends cds.ApplicationService {
+  init() {
+    this.after("READ", async (result, req) => {
+      if (!(result === undefined || result == null)) {
+        const code = getCode(req.target.name, "READ")
+        if (code) {
+          await executeCode.call(this, code, req, result)
+        }
+      }
+    })
 
-/** Generate primary keys for target entity in request */
-async function genid (req) {
-  const {ID} = await cds.tx(req).run (SELECT.one.from(req.target).columns('max(ID) as ID'))
-  req.data.ID = ID - ID % 100 + 100 + 1
+    this.before("CREATE", async (req) => {
+      const code = getCode(req.target.name, "CREATE")
+      if (code) {
+        await executeCode.call(this, code, req)
+      }
+    })
+
+    this.before("UPDATE", async (req) => {
+      const code = getCode(req.target.name, "CREATE")
+      if (code) {
+        await executeCode.call(this, code, req)
+      }
+    })
+
+    this.on("*", async (req, next) => {
+      if (!(req.target === undefined || req.target == null)) return next()
+      //ToDo: check whether action or event is part of an extension
+      // DO NOT OVERWRITE EXISTING Action Implementations!
+      // evaluate: Can we augment action implementation with super.next?
+      if (req.constructor.name === "EventMessage") {
+        const code = getCode(req.event, "ON")
+        if (code) {
+          await executeCode.call(this, code, req)
+        }
+      } else if (req.constructor.name === "ODataRequest") {
+        var output = {}
+        const code = getCode(this.name + "." + req.event, "ON")
+        if (code) {
+          await executeCode.call(this, code, req, {}, output)
+          return output
+        }
+      }
+    })
+
+    //ToDo: Prefix for Service not in event emitter
+    this.before("CREATE", "Authors", async (req) => {
+      let Author = req.data
+      await this.emit("createdAuthor", { Author })
+
+    })
+ 
+    return super.init()
+  }
 }
+
+var counter = 1;
+
+function newLabel() {return "VM2 - req: " + counter++}
+
+//should only work in local exection (cds watch)
+// alternative: Upon Bootstrapping, merge files into CSN
+function getCodeFromFile(name, operation) {
+  const filename = name + "." + operation + ".js"
+  const file = path.join(__dirname, "..", "handlers", filename)
+  try {
+    const code = fs.readFileSync(file, "utf8")
+    return code
+  } catch (error) {
+    return ""
+  }
+}
+
+//after push this should be the only thing that works
+function getCodeFromAnnotation(name, operation) {
+  return ""
+}
+
+function getCode(name, operation) {
+  let code=getCodeFromAnnotation(name, operation)
+  if (code==="") {code=getCodeFromFile(name, operation)}
+  return code
+}
+
+function scanCode(code) {
+  //ESLINT
+}
+
+async function executeCode(code, req, result, output) {
+  const srv = this
+  const label=newLabel()
+  console.time(label)
+  const vm = new VM({
+    console: "inherit",
+    timeout: 500,
+    allowAsync: true,
+    sandbox: { req, //todo: isolate req.data, req.reject, req.error, req.message
+      result, //important for READ
+      output, //used for Action Implementation
+      SELECT :  (class extends require('@sap/cds/lib/ql/SELECT')  {then(r,e) {return srv.run(this).then(r,e)}})._api(),  
+      INSERT :  (class extends require('@sap/cds/lib/ql/INSERT')  {then(r,e) {return srv.run(this).then(r,e)}})._api(), 
+      UPDATE :  (class extends require('@sap/cds/lib/ql/UPDATE')  {then(r,e) {return srv.run(this).then(r,e)}})._api(), 
+      CREATE :  (class extends require('@sap/cds/lib/ql/CREATE')  {then(r,e) {return srv.run(this).then(r,e)}})._api(), 
+      //srv: this,
+      JSON },
+  })
+
+  try {
+    await vm.run(code)
+    return output
+  } catch (error) {
+    console.log(error)
+    req.reject("409", "Error in VM")
+  }
+  finally {
+    console.timeEnd(label)
+  }
+  // console.log(req.data)
+}
+/** Generate primary keys for target entity in request */
+async function genid(req) {
+  const { ID } = await cds
+    .tx(req)
+    .run(SELECT.one.from(req.target).columns("max(ID) as ID"))
+  req.data.ID = ID - (ID % 100) + 100 + 1
+}
+
+module.exports = { AdminService }

bookshop/srv/cat-service.cds

@@ -10,6 +10,8 @@ service CatalogService @(path:'/browse') {
     author.name as author
   } excluding { createdBy, modifiedBy };
 
+@readonly entity Publishers as projection on my.Publishers;
+
   @requires: 'authenticated-user'
   action submitOrder ( book: Books:ID, quantity: Integer ) returns { stock: Integer };
   event OrderedBook : { book: Books:ID; quantity: Integer; buyer: String };

bookshop/srv/code-extensions.cds

@@ -0,0 +1,11 @@
+//this file is machine-created during cds.build
+namespace sap.capire.bookshop; //> important for reflection
+using from '../db/schema';
+using from '../srv/cat-service';
+using from '../srv/admin-service';
+
+annotate AdminService.Authors with @extension.logic: [{when: 'CREATE', code: 'async function run() {\r\n  \/\/debugger\r\n  \/\/while (true) {}\r\n  \/\/process.exit()\r\n  \/\/1.substring()\r\n  \/\/ let res = await specialselect\r\n  let res = await SELECT.one`title`.from(`Books`).where(`ID=201`)\r\n  let { title } = res\r\n  let Author = req.data\r\n  Author.modifiedBy = \"Custom Event handler changed this!\"\r\n  Author.placeOfDeath = \" --- Somewhere over \" + title + \" --- create in Sandbox\"\r\n  \/\/await this.emit(\"createdAuthor\", { Author })\r\n  return Author\r\n}\r\nrun()\r\n'},
+{when: 'READ', code: 'function getYear(v) {\r\n  return parseInt(v.substr(0, 4))\r\n}\r\nfunction getMonth(v) {\r\n  return parseInt(v.substr(5, 2))\r\n}\r\nfunction getDay(v) {\r\n  return parseInt(v.substr(8, 2))\r\n}\r\n\r\nfunction getAge(from, to) {\r\n  if (from === undefined || from == null) return 0\r\n  if (to === undefined || to == null) to = new Date().toISOString()\r\n  let year = getYear(to) - getYear(from) - 1\r\n  if (\r\n    getMonth(to) > getMonth(from) ||\r\n    (getMonth(to) === getMonth(from) && getDay(to) >= getDay(from))\r\n  ) {\r\n    year++\r\n  }\r\n  return year\r\n}\r\n\r\nconst result_ = Array.isArray(result) ? result : [result]\r\nfor (const row of result_) {\r\n  row.modifiedBy += \" --- read in sandbox\"\r\n  row.age = getAge(row.dateOfBirth, row.dateOfDeath)\r\n}'}
+];
+annotate AdminService.Books with @extension.logic;
+annotate CatalogService.ListOfBooks with @extension.logic;

bookshop/test/requests.http

@@ -1,10 +1,46 @@
 @server = http://localhost:4004
 @me = Authorization: Basic {{$processEnv USER}}:
+@id = 2000
+
+
+### ------------------------------------------------------------------------
+# Fetch Authors
+GET {{server}}/admin/Authors
+
+### ------------------------------------------------------------------------
+# Fetch one Author
+GET {{server}}/admin/Authors({{id}})
+
+### ------------------------------------------------------------------------
+# Create Author
+POST {{server}}/admin/Authors
+Content-Type: application/json;IEEE754Compatible=true
+
+{
+  "ID": {{id}},
+  "name": "Nick",
+  "placeOfBirth": "Somewhere",
+  "placeOfDeath": "over the Rainbox",
+  "dateOfBirth" : "1975-05-27"
+}
+
+### ------------------------------------------------------------------------
+# rename author via unbound action
+POST {{server}}/admin/renameAuthor
+Content-Type: application/json
+{{me}}
+
+{ "author":{{id}}, "newName":"Super Nick" }
 
 
 ### ------------------------------------------------------------------------
 # Get service info
-GET {{server}}/browse
+GET {{server}}/admin
+{{me}}
+
+### ------------------------------------------------------------------------
+# Get $metadata document
+GET {{server}}/admin/$metadata
 {{me}}
 
 
@@ -23,27 +59,12 @@ GET {{server}}/browse/ListOfBooks?
 {{me}}
 
 
-### ------------------------------------------------------------------------
-# Fetch Authors as admin
-GET {{server}}/admin/Authors?
-  # &$select=name,dateOfBirth,placeOfBirth
-  # &$expand=books($select=title;$expand=currency)
-  # &$filter=ID eq 101
-  # &sap-language=de
-Authorization: Basic alice:
+
+
 
 ### ------------------------------------------------------------------------
-# Create Author
-POST {{server}}/admin/Authors
-Content-Type: application/json;IEEE754Compatible=true
-Authorization: Basic alice:
-
-{
-  "ID": 112,
-  "name": "Shakespeeeeere",
-  "age": 22
-}
-
+# Fetch Books as admin
+GET {{server}}/admin/Books
 
 ### ------------------------------------------------------------------------
 # Create book
@@ -52,12 +73,12 @@ Content-Type: application/json;IEEE754Compatible=true
 Authorization: Basic alice:
 
 {
-  "ID": 2,
-  "title": "Poems : Pocket Poets",
+  "ID": 16,
+  "title": "Deh4",
   "descr": "The Everyman's Library Pocket Poets hardcover series is popular for its compact size and reasonable price which does not compromise content. Poems: Bronte contains poems that demonstrate a sensibility elemental in its force with an imaginative discipline and flexibility of the highest order. Also included are an Editor's Note and an index of first lines.",
   "author": { "ID": 101 },
   "genre": { "ID": 12 },
-  "stock": 5,
+  "stock": -100,
   "price": "12.05",
   "currency": { "code": "USD" }
 }

fiori/app/admin-authors/fiori-service.cds

@@ -39,7 +39,7 @@ annotate AdminService.Authors with @(UI : {
 
 // Workaround to avoid errors for unknown db-specific calculated fields above
 extend sap.capire.bookshop.Authors with {
-  virtual age      : Integer;
+  //virtual age      : Integer;
   virtual lifetime : String;
 }
 

fiori/app/admin-authors/webapp/manifest.json

@@ -50,6 +50,10 @@
     }
   },
   "sap.ui5": {
+    "flexEnabled": true,
+    "config": {           
+      "experimentalCAPScenario": true
+      },
     "dependencies": {
       "minUI5Version": "1.81.0",
       "libs": {

fiori/app/admin-books/webapp/manifest.json

@@ -22,6 +22,10 @@
         }
     },
     "sap.ui5": {
+        "flexEnabled": true,
+    "config": {           
+      "experimentalCAPScenario": true
+      },
         "dependencies": {
             "libs": {
                 "sap.fe.templates": {}

fiori/app/browse/webapp/manifest.json

@@ -53,6 +53,10 @@
     }
   },
   "sap.ui5": {
+    "flexEnabled": true,
+    "config": {           
+      "experimentalCAPScenario": true
+      },
     "dependencies": {
       "minUI5Version": "1.81.0",
       "libs": {

fiori/app/fiori-apps.html

@@ -10,7 +10,21 @@
 	<script>
 		window["sap-ushell-config"] = {
 			defaultRenderer: "fiori2",
-			applications: {}
+			applications: {},
+			bootstrapPlugins: {
+          RuntimeAuthoringPlugin: {
+            component: "sap.ushell.plugins.rta",
+            config: {
+              validateAppVersion: false,
+            },
+          },
+          PersonalizePlugin: {
+            component: "sap.ushell.plugins.rta-personalize",
+            config: {
+              validateAppVersion: false,
+            },
+          },
+        }
 		};
 	</script>
 
@@ -22,7 +36,11 @@
 			data-sap-ui-frameOptions="allow"
 	></script>
 	<script>
-		sap.ui.getCore().attachInit(()=> sap.ushell.Container.createRenderer().placeAt("content"))
+		sap.ui.getCore().attachInit(()=> sap.ushell.Container.createRenderer().placeAt("content"));
+		sap.ui
+        .getCore()
+        .getConfiguration()
+        .setFlexibilityServices([{ connector: "SessionStorageConnector" }]);
 	</script>
 
 </head>

fiori/package.json

@@ -36,7 +36,10 @@
         }
       },
       "db": {
-        "kind": "sql"
+        "kind": "sqlite",
+        "credentials": {
+          "database": "sqlite.db"
+        }
       },
       "db-ext": {
         "[development]": {

orders/app/fiori.cds

@@ -2,19 +2,19 @@
 
 ////////////////////////////////////////////////////////////////////////////
 //
-//	Note: this is designed for the PerformanceService being co-located with
-//	bookshop. It does not work if PerformanceService is run as a separate
+//	Note: this is designed for the OrdersService being co-located with
+//	bookshop. It does not work if OrdersService is run as a separate
 // 	process, and is not intended to do so.
 //
 ////////////////////////////////////////////////////////////////////////////
 
 
 
-using { PerformanceService } from '../srv/performance-service';
+using { OrdersService } from '../srv/orders-service';
 
 
 @odata.draft.enabled
-annotate PerformanceService.Orders with @(
+annotate OrdersService.Orders with @(
 	UI: {
 		SelectionFields: [ createdAt, createdBy ],
 		LineItem: [
@@ -68,7 +68,7 @@ annotate PerformanceService.Orders with @(
 
 
 
-annotate PerformanceService.Orders.Items with @(
+annotate OrdersService.Orders.Items with @(
 	UI: {
 		LineItem: [
 			{Value: product_ID, Label:'Product ID'},

orders/db/data/sap.capire.orders-Orders.Items.csv

@@ -1,4 +1,4 @@
-ID;Header_ID;quantity;product_ID;title;price
-58040e66-1dcd-4ffb-ab10-fdce32028b79;7e2f2640-6866-4dcf-8f4d-3027aa831cad;10;201;Wuthering Heights;11.11
-64e718c9-ff99-47f1-8ca3-950c850777d4;7e2f2640-6866-4dcf-8f4d-3027aa831cad;501;271;Catweazle;15
-e9641166-e050-4261-bfee-d1e797e6cb7f;64e718c9-ff99-47f1-8ca3-950c850777d4;499;252;Eleonora;28
+ID;up__ID;quantity;product_ID;title;price
+58040e66-1dcd-4ffb-ab10-fdce32028b79;7e2f2640-6866-4dcf-8f4d-3027aa831cad;1;201;Wuthering Heights;11.11
+64e718c9-ff99-47f1-8ca3-950c850777d4;7e2f2640-6866-4dcf-8f4d-3027aa831cad;1;271;Catweazle;15
+e9641166-e050-4261-bfee-d1e797e6cb7f;64e718c9-ff99-47f1-8ca3-950c850777d4;2;252;Eleonora;28

orders/db/schema.cds

@@ -0,0 +1,24 @@
+using { Currency, User, managed, cuid } from '@sap/cds/common';
+namespace sap.capire.orders;
+
+entity Orders : cuid, managed {
+  OrderNo  : String @title:'Order Number'; //> readable key
+  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;
+}
+
+/** 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/srv/orders-service.cds

@@ -0,0 +1,5 @@
+using { sap.capire.orders as my } from '../db/schema';
+
+service OrdersService {
+  entity Orders as projection on my.Orders;
+}

orders/srv/orders-service.js

@@ -5,14 +5,6 @@ class OrdersService extends cds.ApplicationService {
   init(){
     const { 'Orders.Items':OrderItems } = this.entities
 
-    // fill itemCategory at runtime
-    this.before (['CREATE', 'UPDATE'], async req =>{
-      if(req.data.quantity > 500) {req.data.itemCategory = 'Large'}
-        else if (req.data.quantity > 100) {req.data.itemCategory = 'Medium'}
-        else    {req.data.itemCategory = 'Small'}
-    })   
-    //
-
     this.before ('UPDATE', 'Orders', async function(req) {
       const { ID, Items } = req.data
       if (Items) for (let { product_ID, quantity } of Items) {

performance/db/data/sap.capire.performance-Authors.csv

@@ -1,5 +0,0 @@
-ID;name;dateOfBirth;placeOfBirth;dateOfDeath;placeOfDeath
-101;Emily Brontë;1818-07-30;Thornton, Yorkshire;1848-12-19;Haworth, Yorkshire
-107;Charlotte Brontë;1818-04-21;Thornton, Yorkshire;1855-03-31;Haworth, Yorkshire
-150;Edgar Allen Poe;1809-01-19;Boston, Massachusetts;1849-10-07;Baltimore, Maryland
-170;Richard Carpenter;1929-08-14;King’s Lynn, Norfolk;2012-02-26;Hertfordshire, England

performance/db/data/sap.capire.performance-Books.csv

@@ -1,6 +0,0 @@
-ID;title;descr;author_ID;stock;price;currency_code
-201;Wuthering Heights;"Wuthering Heights, Emily Brontë's only novel, was published in 1847 under the pseudonym ""Ellis Bell"". It was written between October 1845 and June 1846. Wuthering Heights and Anne Brontë's Agnes Grey were accepted by publisher Thomas Newby before the success of their sister Charlotte's novel Jane Eyre. After Emily's death, Charlotte edited the manuscript of Wuthering Heights and arranged for the edited version to be published as a posthumous second edition in 1850.";101;12;11.11;GBP
-207;Jane Eyre;"Jane Eyre /ɛər/ (originally published as Jane Eyre: An Autobiography) is a novel by English writer Charlotte Brontë, published under the pen name ""Currer Bell"", on 16 October 1847, by Smith, Elder & Co. of London. The first American edition was published the following year by Harper & Brothers of New York. Primarily a bildungsroman, Jane Eyre follows the experiences of its eponymous heroine, including her growth to adulthood and her love for Mr. Rochester, the brooding master of Thornfield Hall. The novel revolutionised prose fiction in that the focus on Jane's moral and spiritual development is told through an intimate, first-person narrative, where actions and events are coloured by a psychological intensity. The book contains elements of social criticism, with a strong sense of Christian morality at its core and is considered by many to be ahead of its time because of Jane's individualistic character and how the novel approaches the topics of class, sexuality, religion and feminism.";107;11;12.34;GBP
-251;The Raven;"""The Raven"" is a narrative poem by American writer Edgar Allan Poe. First published in January 1845, the poem is often noted for its musicality, stylized language, and supernatural atmosphere. It tells of a talking raven's mysterious visit to a distraught lover, tracing the man's slow fall into madness. The lover, often identified as being a student, is lamenting the loss of his love, Lenore. Sitting on a bust of Pallas, the raven seems to further distress the protagonist with its constant repetition of the word ""Nevermore"". The poem makes use of folk, mythological, religious, and classical references.";150;333;13.13;USD
-252;Eleonora;"""Eleonora"" is a short story by Edgar Allan Poe, first published in 1842 in Philadelphia in the literary annual The Gift. It is often regarded as somewhat autobiographical and has a relatively ""happy"" ending.";150;555;14;USD
-271;Catweazle;Catweazle is a British fantasy television series, starring Geoffrey Bayldon in the title role, and created by Richard Carpenter for London Weekend Television. The first series, produced and directed by Quentin Lawrence, was screened in the UK on ITV in 1970. The second series, directed by David Reid and David Lane, was shown in 1971. Each series had thirteen episodes, most but not all written by Carpenter, who also published two books based on the scripts.;170;22;150;JPY

performance/db/data/sap.capire.performance-Books_texts.csv

@@ -1,5 +0,0 @@
-ID;locale;title;descr
-201;de;Sturmhöhe;Sturmhöhe (Originaltitel: Wuthering Heights) ist der einzige Roman der englischen Schriftstellerin Emily Brontë (1818–1848). Der 1847 unter dem Pseudonym Ellis Bell veröffentlichte Roman wurde vom viktorianischen Publikum weitgehend abgelehnt, heute gilt er als ein Klassiker der britischen Romanliteratur des 19. Jahrhunderts.
-201;fr;Les Hauts de Hurlevent;Les Hauts de Hurlevent (titre original : Wuthering Heights), parfois orthographié Les Hauts de Hurle-Vent, est l'unique roman d'Emily Brontë, publié pour la première fois en 1847 sous le pseudonyme d’Ellis Bell. Loin d'être un récit moralisateur, Emily Brontë achève néanmoins le roman dans une atmosphère sereine, suggérant le triomphe de la paix et du Bien sur la vengeance et le Mal.
-207;de;Jane Eyre;Jane Eyre. Eine Autobiographie (Originaltitel: Jane Eyre. An Autobiography), erstmals erschienen im Jahr 1847 unter dem Pseudonym Currer Bell, ist der erste veröffentlichte Roman der britischen Autorin Charlotte Brontë und ein Klassiker der viktorianischen Romanliteratur des 19. Jahrhunderts. Der Roman erzählt in Form einer Ich-Erzählung die Lebensgeschichte von Jane Eyre (ausgesprochen /ˌdʒeɪn ˈɛə/), die nach einer schweren Kindheit eine Stelle als Gouvernante annimmt und sich in ihren Arbeitgeber verliebt, jedoch immer wieder um ihre Freiheit und Selbstbestimmung kämpfen muss. Als klein, dünn, blass, stets schlicht dunkel gekleidet und mit strengem Mittelscheitel beschrieben, gilt die Heldin des Romans Jane Eyre nicht zuletzt aufgrund der Kino- und Fernsehversionen der melodramatischen Romanvorlage als die bekannteste englische Gouvernante der Literaturgeschichte
-252;de;Eleonora;“Eleonora” ist eine Erzählung von Edgar Allan Poe. Sie wurde 1841 erstveröffentlicht. In ihr geht es um das Paradox der Treue in der Treulosigkeit.

performance/db/schema.cds

@@ -1,122 +0,0 @@
-using { Currency, cuid, managed } from '@sap/cds/common';
-
-namespace sap.capire.performance;
-
-
-entity OrdersHeaders : managed {
-  key ID   : UUID;
-  OrderNo  : String @title:'Order Number'; //> readable key 
-  buyer    : String;
-  currency : Currency;
-  Items    : Composition of many OrdersItems on Items.Header = $self;
-}
-
-entity OrdersItems   {
-    key ID    : UUID;
-    product   : Association to Books;
-    quantity  : Integer;
-    title     : String; //> intentionally replicated as snapshot from product.title
-    price     : Double; //> materialized calculated field
-    Header    : Association to OrdersHeaders;  
-};
-
-
-entity Books {
-  key ID : Integer;
-  title  : localized String(111);
-  descr  : localized String(1111);
-  author : Association to Authors;
-  stock  : Integer;
-  price  : Decimal;
-  currency : Currency;
-}
-
-entity Authors  {
-  key ID : Integer;
-  name   : String(111);
-  dateOfBirth  : Date;
-  dateOfDeath  : Date;
-  placeOfBirth : String;
-  placeOfDeath : String;
-  books  : Association to many Books on books.author = $self;
-}
-
-
-entity Apples : cuid, managed { 
-  description  : String;
-  vendor       : association to one Vendor;
-  appleDetails : appleDetailsType;
-}
-
-entity Bananas : cuid, managed { 
-  description   : String;
-  vendor        : association to one Vendor;
-  bananaDetails : bananaDetailsType;
-}
-
-entity Cherries : cuid, managed {
-  description   : String;
-  vendor        : association to one Vendor;
-  cherryDetails : cherryDetailsType;
-}
-
-entity Mangos : cuid, managed {
-  description  : String;
-  vendor       : association to one Vendor;
-  mangoDetails : mangoDetailsType;
-}
-
-entity Vendor : cuid, managed { 
-  description  : String;
-}
-
-type appleDetailsType  : String;
-type bananaDetailsType : String;
-type cherryDetailsType : String;
-type mangoDetailsType  : String;
-
-entity Fruit : cuid, managed {
-    type          : String enum { apple; banana; cherry; mango };
-    description   : String;
-    vendor        : association to one Vendor;   
-    appleDetails  : composition of AppleDetails;
-    bananaDetails : composition of BananaDetails;
-    cherryDetails : composition of CherryDetails;
-    mangoDetails  : composition of MangoDetails; 
-}
-
-entity AppleDetails : cuid {
-  appleDetails : appleDetailsType;
-}
-
-entity BananaDetails : cuid {
-  bananaDetails : bananaDetailsType;
-}
-
-entity CherryDetails : cuid {
-  cherryDetails : cherryDetailsType;
-}
-
-entity MangoDetails : cuid {
-  mangoDetails : mangoDetailsType;
-}
-
-view Banana as select from Fruit
-{
-    type,
-    description,
-    vendor,
-    bananaDetails,
-}
-    where type = 'banana';
-
-
-aspect apple  { appleDetails  : appleDetailsType; };
-aspect banana { bananaDetails : bananaDetailsType;};
-aspect cherry { cherryDetails : cherryDetailsType;};
-aspect mango  { mangoDetails  : mangoDetailsType; };
-entity Fruit_2 : apple, banana, cherry, mango, cuid, managed {
-    type        : String enum { apple; banana; cherry; mango };
-    description : String;
-    vendor      : association to one Vendor;
-}

performance/srv/performance-service.cds

@@ -1,95 +0,0 @@
-using { sap.capire.performance as my } from '../db/schema';
-
-service PerformanceService {
-  entity OrdersHeaders as projection on my.OrdersHeaders;
-  entity OrdersItems   as projection on my.OrdersItems;
-  entity Books         as projection on my.Books;
-  entity Authors       as projection on my.Authors;
-
-// static
-view OrdersItemsViewJoin as select 
-
-    OrdersHeaders.ID        as Header_ID, 
-    OrdersHeaders.OrderNo   as OrderNo, 
-    OrdersHeaders.buyer     as buyer, 
-    OrdersHeaders.currency  as currency,
-    key OrdersItems.ID      as Item_ID,
-    OrdersItems.product     as product,
-    OrdersItems.quantity    as quantity,
-    OrdersItems.title       as title,
-    OrdersItems.price       as price
-
- from OrdersHeaders JOIN OrdersItems on OrdersHeaders.ID = OrdersItems.Header.ID;
-
-// dynamic entity
-entity OrderItemsViewAssoc as projection on OrdersHeaders;
-
-// sort on right table
-view SortedOrdersJoin as select 
-    OrdersHeaders.ID        as Header_ID, 
-    OrdersHeaders.OrderNo   as OrderNo, 
-    OrdersHeaders.buyer     as buyer, 
-    OrdersHeaders.currency  as currency,
-    key OrdersItems.ID      as Item_ID,
-    OrdersItems.product     as product,
-    OrdersItems.quantity    as quantity,
-    OrdersItems.title       as title,
-    OrdersItems.price       as price
-from OrdersHeaders JOIN OrdersItems on OrdersHeaders.ID = OrdersItems.Header.ID
-order by title;
-
-// sort on items and join back to header via assoc
-
-view SortedOrdersAssoc as select
-from OrdersItems {*, Header.OrderNo, Header.buyer, Header.currency }
-order by OrdersItems.title;
-
-// filter on right table 
-
-view FilteredOrdersJoin as select 
-    OrdersHeaders.ID        as Header_ID, 
-    OrdersHeaders.OrderNo   as OrderNo, 
-    OrdersHeaders.buyer     as buyer, 
-    OrdersHeaders.currency  as currency,
-    key OrdersItems.ID          as Item_ID,
-    OrdersItems.product     as product,
-    OrdersItems.quantity    as quantity,
-    OrdersItems.title       as title,
-    OrdersItems.price       as price
-from OrdersHeaders JOIN OrdersItems on OrdersHeaders.ID = OrdersItems.Header.ID
-where price > 100;
-
-// filter on items and join back to header via assoc
-
-view FilteredOrdersAssoc as select
-from OrdersItems {*, Header.OrderNo, Header.buyer, Header.currency }
-where OrdersItems.price > 100;
-
-
-// TODO avoid CASE -- Denormalization of expensive complex structures, 
-// calculate on write instead of read
-
-// CASE -> try to remodel to avoid CASE, if re-modelling is not possible, 
-// fill redundant fields at write
-
-entity OrdersItemsCaseView as projection on OrdersItems {
-    *,
-    case  
-       when quantity > 500 then 'Large'
-       when quantity > 100 then 'Medium'       
-       else 'Small'
-    end as category : String
-};
-
-
-extend my.OrdersItems with {
-    itemCategory: String enum{ Small; Medium; Large;};
-    // fill itemCategory at runtime in performance-service.js
-}
-
-entity OrdersItemsNoCaseView as projection on OrdersItems {
-    *,
-    itemCategory as category 
-};
-}
-