feat: upgrade script for #14113

src/upgrades/4.11.0/backfill-user-cids.js

@@ -0,0 +1,30 @@
+'use strict';
+
+const db = require('../../database');
+const batch = require('../../batch');
+
+module.exports = {
+	name: 'Backfill user posted categories',
+	timestamp: Date.UTC(2026, 2, 20),
+	method: async function () {
+		const { progress } = this;
+		await batch.processSortedSet('posts:pid', async (pids) => {
+			const postData = await db.getObjectsFields(pids.map(pid => `post:${pid}`), ['uid', 'cid']);
+			const bulkIncr = [];
+			postData.forEach((post) => {
+				if (post && post.uid && post.cid) {
+					bulkIncr.push([`uid:${post.uid}:cids`, 1, post.cid]);
+				}
+			});
+
+			if (bulkIncr.length) {
+				await db.sortedSetIncrByBulk(bulkIncr);
+			}
+
+			progress.incr(pids.length);
+		}, {
+			batch: 500,
+			progress,
+		});
+	},
+};