FastAPI / SQLAlchemy N+1 query middleware
A FastAPI middleware to find N+1 queries in development. This middleware helps developers identify and fix N+1 query issues in their FastAPI applications. It provides logging information to help locate the query and the number of N+1 query occurrences.
This middleware should probably not be used in production, but it can be useful during development and testing.
Installation
Pip Install:
pip install fastapi-nplusone
UV install:
uv install fastapi-nplusone
Poetry install:
poetry add fastapi-nplusone
Usage
This middleware while suitable to run in production should probably be limited to development and tesring. The code snippet below shows how to add the middleware to your application.
from fastapi import FastAPI
from fastapi_nplusone import NPlusOneMiddleware
app = FastAPI()
if not app.debug:
app.add_middleware(NPlusOneMiddleware)
Example Output:
WARNING:fastapi_nplusone:Potential N+1 query detected on GET /api/changes: Query executed 3 times. Normalized query: SELECT change.id AS change_id
Tests
To run the tests:
uv run pytest ./tests
1 maintainer
Metadata
1 maintainer
Release files for fastapi-nplusone 0.1.0
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Source distribution (sdist)
| File | Size | Uploaded | Provenance | Actions |
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| fastapi_nplusone-0.1.0.tar.gz | 3.7 kB | Without provenance | Details for fastapi_nplusone-0.1.0.tar.gz |
Built distribution (wheel)
| File | Interpreter | ABI | Platform | Actions Reset |
|---|---|---|---|---|
| fastapi_nplusone-0.1.0-py3-none-any.whl | Python 3 | none | any | Details for fastapi_nplusone-0.1.0-py3-none-any.whl |
Total release size: 8.5 kB
Release files / fastapi_nplusone-0.1.0.tar.gz
| Download URL | fastapi_nplusone-0.1.0.tar.gz |
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| Size | 3.7 kB |
| Tags | Source |
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SHA-256 checksum How to use checksums |
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Release files / fastapi_nplusone-0.1.0-py3-none-any.whl
| Download URL | fastapi_nplusone-0.1.0-py3-none-any.whl |
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| Size | 4.8 kB |
| Tags | Python 3 |
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Security for fastapi-nplusone 0.1.0
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