feat: add changelog tracking for representatives_meta_index table (closes #97)

Author: mistakia

api/routes/accounts/index.mjs

@@ -92,8 +92,9 @@ router.get('/:address', async (req, res) => {
       .where({ account: address })
       .orderBy('interval', 'asc')
 
-    const repMeta = await db('representatives_meta_index')
-      .where({ account: address })
+    const repMeta = await db('representatives_meta_index').where({
+      account: address
+    })
 
     const network = await db('representatives_network')
       .where({ account: address })

db/schema.sql

@@ -245,6 +245,23 @@ CREATE TABLE `representatives_meta_index` (
 
 -- --------------------------------------------------------
 
+--
+-- Table structure for table `representatives_meta_index_changelog`
+--
+
+DROP TABLE IF EXISTS `representatives_meta_index_changelog`;
+
+CREATE TABLE `representatives_meta_index_changelog` (
+  `account` char(65) NOT NULL,
+  `column` varchar(65) NOT NULL,
+  `previous_value` text CHARACTER SET utf8mb4 DEFAULT '',
+  `new_value` text CHARACTER SET utf8mb4 DEFAULT '',
+  `timestamp` int(11) NOT NULL,
+  UNIQUE `change` (`account`, `column`, `previous_value`(60), `new_value`(60))
+) ENGINE=MyISAM DEFAULT CHARSET=utf8mb4 COLLATE utf8mb4_unicode_ci;
+
+-- --------------------------------------------------------
+
 --
 -- Table structure for table `representatives_telemetry`
 --