2 add isolation level to transactions (#3)

* disable autocommit, isolation level serializable * update to version 1.1
intragart · Jan 5, 2023 · 8a2010f · 8a2010f
1 parent ec539c9
commit 8a2010f
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diff --git a/CHANGELOG b/CHANGELOG
@@ -5,10 +5,18 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [1.1] - 2023-01-05
+
+### Changed
+
+- Disabled autocommit when transactions are used
+- Added isolation level serializable to all transactions
+
 ## [1.0] - 2023-01-01
 
 ### Added
 
 - Initial Release of the Project
 
+[1.1]: https://github.com/intragart/Shared-Household-Expenses/compare/v1.0...v1.1
 [1.0]: https://github.com/intragart/Shared-Household-Expenses/releases/tag/v1.0
diff --git a/version b/version
@@ -1 +1 @@
-v1.0
+v1.1
diff --git a/webapp/www/api/delete-purchase.php b/webapp/www/api/delete-purchase.php
@@ -27,7 +27,12 @@
     $db_settings = get_db_login("admin");
 
     // connect to database and start a transaction
-    $db = new MySQLi($db_settings[0], $db_settings[1], $db_settings[2], $db_settings[3], $db_settings[4], $db_settings[5]); 
+    $db = new MySQLi($db_settings[0], $db_settings[1], $db_settings[2], $db_settings[3], $db_settings[4], $db_settings[5]);
+
+    // disable autocommit and set isolation level to serialize
+    $db->autocommit(false);
+    $db->query("SET SESSION TRANSACTION ISOLATION LEVEL SERIALIZABLE");
+
     $db->begin_transaction(MYSQLI_TRANS_START_WITH_CONSISTENT_SNAPSHOT);
 
     try {

diff --git a/webapp/www/api/insert-purchase.php b/webapp/www/api/insert-purchase.php
@@ -94,7 +94,12 @@ function getRetailerID ($retailer_name) {
     $db_settings = get_db_login("admin");
 
     // connect to database and start a transaction
-    $db = new MySQLi($db_settings[0], $db_settings[1], $db_settings[2], $db_settings[3], $db_settings[4], $db_settings[5]); 
+    $db = new MySQLi($db_settings[0], $db_settings[1], $db_settings[2], $db_settings[3], $db_settings[4], $db_settings[5]);
+
+    // disable autocommit and set isolation level to serialize
+    $db->autocommit(false);
+    $db->query("SET SESSION TRANSACTION ISOLATION LEVEL SERIALIZABLE");
+
     $db->begin_transaction(MYSQLI_TRANS_START_WITH_CONSISTENT_SNAPSHOT);
 
     try {

diff --git a/webapp/www/api/insert-user.php b/webapp/www/api/insert-user.php
@@ -43,7 +43,12 @@
     $db_settings = get_db_login("admin");
 
     // connect to database and start a transaction
-    $db = new MySQLi($db_settings[0], $db_settings[1], $db_settings[2], $db_settings[3], $db_settings[4], $db_settings[5]); 
+    $db = new MySQLi($db_settings[0], $db_settings[1], $db_settings[2], $db_settings[3], $db_settings[4], $db_settings[5]);
+
+    // disable autocommit and set isolation level to serialize
+    $db->autocommit(false);
+    $db->query("SET SESSION TRANSACTION ISOLATION LEVEL SERIALIZABLE");
+
     $db->begin_transaction(MYSQLI_TRANS_START_WITH_CONSISTENT_SNAPSHOT);
 
     try {

diff --git a/webapp/www/api/update-purchase.php b/webapp/www/api/update-purchase.php
@@ -110,7 +110,12 @@ function getRetailerID ($retailer_name) {
     $db_settings = get_db_login("admin");
 
     // connect to database and start a transaction
-    $db = new MySQLi($db_settings[0], $db_settings[1], $db_settings[2], $db_settings[3], $db_settings[4], $db_settings[5]); 
+    $db = new MySQLi($db_settings[0], $db_settings[1], $db_settings[2], $db_settings[3], $db_settings[4], $db_settings[5]);
+
+    // disable autocommit and set isolation level to serialize
+    $db->autocommit(false);
+    $db->query("SET SESSION TRANSACTION ISOLATION LEVEL SERIALIZABLE");
+
     $db->begin_transaction(MYSQLI_TRANS_START_WITH_CONSISTENT_SNAPSHOT);
 
     try {

diff --git a/webapp/www/api/update-user.php b/webapp/www/api/update-user.php
@@ -46,7 +46,12 @@
     $db_settings = get_db_login("admin");
 
     // connect to database and start a transaction
-    $db = new MySQLi($db_settings[0], $db_settings[1], $db_settings[2], $db_settings[3], $db_settings[4], $db_settings[5]); 
+    $db = new MySQLi($db_settings[0], $db_settings[1], $db_settings[2], $db_settings[3], $db_settings[4], $db_settings[5]);
+
+    // disable autocommit and set isolation level to serialize
+    $db->autocommit(false);
+    $db->query("SET SESSION TRANSACTION ISOLATION LEVEL SERIALIZABLE");
+
     $db->begin_transaction(MYSQLI_TRANS_START_WITH_CONSISTENT_SNAPSHOT);
 
     try {