N Plus One Python Packages

django-query-counter

Count Django SQL queries and surface duplicate (N+1) and slow ones in the console — works as a decorator (management commands, tasks, views) or as middleware

queryspy

N+1 and query-budget detection for SQLAlchemy 2.0 — sync and async

django-chainsaw-mcp

Finds what will hurt in a Django project - cascade impact, N+1 queries, unsafe migrations, unscoped tenant reads - as an MCP server and a CLI. Tested against 18 public projects.

pytest-querycount

Fail your tests when they run too many SQL queries. Catch N+1 problems in CI, not in production.

django-query-guard

Detect and prevent N+1 database queries in Django applications with Pytest integration.

brakit

You writes your code. Brakit watches what it does.

django-fetch-guard

Prevent accidental Django ORM queries with strict fetch contracts, automatic N+1 batching, DRF integration, and support for Django 4.2–6.1.

pytest-queryguard

pytest plugin that catches N+1 queries and enforces query budgets for SQLAlchemy 2 (sync, async, FastAPI)