From 82a0734d73fde846b69992ddd97bb9c0aee852bd Mon Sep 17 00:00:00 2001
From: aayushbaluni <73417844+aayushbaluni@users.noreply.github.com>
Date: Sat, 2 May 2026 00:03:28 +0530
Subject: [PATCH] fix: preserve array query parameters in user redirect

Dynamic group redirects rebuilt the query string with
URLSearchParams(context.query as Record<string, string>), which coerced
string[] values incorrectly. Append each query value explicitly instead.

Fixes calcom/cal.com#28687
---
 apps/web/server/lib/[user]/getServerSideProps.ts | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/apps/web/server/lib/[user]/getServerSideProps.ts b/apps/web/server/lib/[user]/getServerSideProps.ts
index 21eae4b913dbde..c5406a62442def 100644
--- a/apps/web/server/lib/[user]/getServerSideProps.ts
+++ b/apps/web/server/lib/[user]/getServerSideProps.ts
@@ -107,7 +107,15 @@ export const getServerSideProps: GetServerSideProps<UserPageProps> = async (cont
 
     // EXAMPLE - context.params: { orgSlug: 'acme', user: 'member0+owner1' }
     // EXAMPLE - context.query: { redirect: 'undefined', orgRedirection: 'undefined', user: 'member0+owner1' }
-    const originalQueryString = new URLSearchParams(context.query as Record<string, string>).toString();
+    const params = new URLSearchParams();
+    for (const [key, value] of Object.entries(context.query)) {
+      if (Array.isArray(value)) {
+        value.forEach((v) => params.append(key, v));
+      } else if (value !== undefined) {
+        params.append(key, value);
+      }
+    }
+    const originalQueryString = params.toString();
     const destinationWithQuery = `${destinationUrl}?${originalQueryString}`;
     log.debug(`Dynamic group detected, redirecting to ${destinationUrl}`);
     return {