Restore simple bookshop - no workarounds

Signed-off-by: Daniel <daniel.hutzel@sap.com>

Author: danjoa

bookshop/srv/admin-service.cds

@@ -3,7 +3,3 @@ service AdminService @(requires:'admin') {
   entity Books as projection on my.Books;
   entity Authors as projection on my.Authors;
 }
-
-//Since ID is computed, we can hide the popup for ID on Create
-annotate AdminService.Books with   { ID @Core.Computed; }
-annotate AdminService.Authors with { ID @Core.Computed; }

bookshop/srv/cat-service.cds

@@ -1,42 +1,16 @@
-using {sap.capire.bookshop as my} from '../db/schema';
+using { sap.capire.bookshop as my } from '../db/schema';
+service CatalogService @(path:'/browse') {
 
-service CatalogService @(path : '/browse') {
+  /** For displaying lists of Books */
+  @readonly entity ListOfBooks as projection on Books
+  excluding { descr };
 
-  /**
-   * For displaying lists of Books
-   */
-  @readonly
-  entity ListOfBooks as projection on Books excluding {
-    descr
-  };
+  /** For display in details pages */
+  @readonly entity Books as projection on my.Books { *,
+    author.name as author
+  } excluding { createdBy, modifiedBy };
 
-  /**
-   * For display in details pages
-   */
-  @readonly
-  entity Books       as projection on my.Books {
-    * , author.name as authorName
-  } excluding {
-    createdBy,
-    modifiedBy
-  };
-
-  @readonly
-  entity Authors     as projection on my.Authors {
-    * , books : redirected to Books
-  } excluding {
-    createdBy,
-    modifiedBy
-  };
-
-  @requires : 'authenticated-user'
-  action submitOrder(book : Books:ID, quantity : Integer) returns {
-    stock : Integer
-  };
-
-  event OrderedBook : {
-    book     : Books:ID;
-    quantity : Integer;
-    buyer    : String
-  };
+  @requires: 'authenticated-user'
+  action submitOrder ( book: Books:ID, amount: Integer ) returns { stock: Integer };
+  event OrderedBook : { book: Books:ID; amount: Integer; buyer: String };
 }