use database constraints

... in bookshop, orders, reviews
+ update package.json and package-lock.json as db constraints
  requires latest cds

bookshop/package.json

@@ -18,6 +18,9 @@
       "db": {
         "kind": "sql"
       }
+    },
+    "features": {
+      "assert_integrity": "db"
     }
   }
 }

bookshop/test/requests.http

@@ -17,7 +17,7 @@ GET {{server}}/browse/$metadata
 ### ------------------------------------------------------------------------
 # Browse Books as any user
 GET {{server}}/browse/Books?
-  # &$select=title,stock
+  &$select=title,stock,author
   # &$expand=currency
   # &sap-language=de
 {{me}}
@@ -62,6 +62,22 @@ Authorization: Basic alice:
   "currency": { "code": "USD" }
 }
 
+### ------------------------------------------------------------------------
+# Create book with invalid author ID -> will fail
+POST {{server}}/admin/Books
+Content-Type: application/json;IEEE754Compatible=true
+Authorization: Basic alice:
+
+{
+  "ID": 34,
+  "title": "Let constraints do the magic",
+  "descr": "Database constraints are helpful little things that prevent messing up your data.",
+  "author": { "ID": 777 },
+  "genre": { "ID": 14 },
+  "stock": 4,
+  "price": "19.99",
+  "currency": { "code": "USD" }
+}
 
 ### ------------------------------------------------------------------------
 # Put image to books

orders/package.json

@@ -4,5 +4,10 @@
   "dependencies": {
     "@capire/common": "*",
     "@sap/cds": "^5"
+  },
+  "cds": {
+    "features": {
+      "assert_integrity": "db"
+    }
   }
 }

package.json

@@ -13,7 +13,7 @@
     "@capire/media": "./media",
     "@capire/orders": "./orders",
     "@capire/reviews": "./reviews",
-    "@sap/cds": "^5.5.3"
+    "@sap/cds": "^5.7.3"
   },
   "devDependencies": {
     "chai": "^4.3.4",

reviews/package.json

@@ -18,6 +18,9 @@
         "[production]": { "kind": "enterprise-messaging" }
       },
       "db": { "kind": "sql" }
+    },
+    "features": {
+      "assert_integrity": "db"
     }
   }
 }