From dc21805077103e6f8cfdab020f418a643114faeb Mon Sep 17 00:00:00 2001
From: billlzzz10 <208072329+billlzzz10@users.noreply.github.com>
Date: Thu, 23 Jul 2026 17:28:19 +0000
Subject: [PATCH] perf(admin): resolve N+1 query in CSV import route

Instead of making a database query for each row in the CSV to check if the prompt exists, the route now fetches all existing prompts matching the CSV titles in a single bulk query and stores them in a memory Set for O(1) lookups.

Co-authored-by: google-labs-jules[bot] <161369871+google-labs-jules[bot]@users.noreply.github.com>
---
 src/app/api/admin/import-prompts/route.ts | 19 +++++++++++++------
 1 file changed, 13 insertions(+), 6 deletions(-)

diff --git a/src/app/api/admin/import-prompts/route.ts b/src/app/api/admin/import-prompts/route.ts
index 8efd7b3a..5fa11ea8 100644
--- a/src/app/api/admin/import-prompts/route.ts
+++ b/src/app/api/admin/import-prompts/route.ts
@@ -196,18 +196,25 @@ export async function POST(request: NextRequest) {
     let skipped = 0;
     const errors: string[] = [];
 
+    // ⚡ Bolt Optimization: Prevent N+1 query by fetching existing titles in bulk
+    const titlesToImport = rows.map((r) => r.act).filter(Boolean);
+    const existingPrompts = await db.prompt.findMany({
+      where: { title: { in: titlesToImport } },
+      select: { title: true },
+    });
+    const existingTitles = new Set(existingPrompts.map((p) => p.title));
+
     for (const row of rows) {
       try {
-        // Check if prompt with same title already exists
-        const existing = await db.prompt.findFirst({
-          where: { title: row.act },
-        });
-
-        if (existing) {
+        // Check if prompt with same title already exists (O(1) memory lookup)
+        if (existingTitles.has(row.act)) {
           skipped++;
           continue;
         }
 
+        // Add to set to prevent duplicates if CSV has duplicate titles
+        existingTitles.add(row.act);
+
         // Get or create contributor user
         const authorId = await getOrCreateContributor(row.contributor);