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⚡ Bolt: Optimize CSV import to prevent N+1 query bottleneck #169

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⚡ Bolt: Optimize CSV import to prevent N+1 query bottleneck #169

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19 changes: 13 additions & 6 deletions src/app/api/admin/import-prompts/route.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -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);

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