From 840a8f01d65e97a0662ec8b3aebb592d621724c2 Mon Sep 17 00:00:00 2001
From: Pekka Helenius <fincer89@hotmail.com>
Date: Tue, 22 Sep 2020 01:15:54 +0300
Subject: [PATCH] Add additional book ID check

Signed-off-by: Pekka Helenius <fincer89@hotmail.com>
---
 .../main/java/com/fjordtek/bookstore/web/BookController.java | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/bookstore/src/main/java/com/fjordtek/bookstore/web/BookController.java b/bookstore/src/main/java/com/fjordtek/bookstore/web/BookController.java
index e8086be..9e6dc2d 100644
--- a/bookstore/src/main/java/com/fjordtek/bookstore/web/BookController.java
+++ b/bookstore/src/main/java/com/fjordtek/bookstore/web/BookController.java
@@ -204,7 +204,10 @@ public class BookController {
 			HttpServletResponse responseData
 			) {
 
-		bookId = book.getId();
+		// NOTE: We have a unique and non-nullable ISBN value for each book.
+		if (bookId != book.getId()) {
+			bindingResult.rejectValue("name", "error.user", "Wrong book");
+		}
 
 		if (bindingResult.hasErrors()) {
 			responseData.setStatus(HttpServletResponse.SC_BAD_REQUEST);