Setting up db migrations

apps/api/src/database/db.ts

@@ -1,5 +1,5 @@
-import { Kysely, PostgresDialect } from 'kysely';
-import { type DB } from 'kysely-codegen';
+import { CreateTableBuilder, Kysely, PostgresDialect, sql } from 'kysely';
+import { type DB } from "./types";
 import { Pool } from "pg";
 import { env } from '../util';
 
@@ -10,3 +10,15 @@ export const db = new Kysely<DB>({
         }),
     })
 });
+
+export function addDefaultColumns(ctb: CreateTableBuilder<any, any>) {
+    return ctb
+        .addColumn("id", "bigint", (cb) => cb
+            .generatedAlwaysAsIdentity()
+            .primaryKey()
+        )
+        .addColumn("created_at", "timestamptz", (cb) => cb
+            .notNull()
+            .defaultTo(sql`now()`)
+        )
+};