Python Django Best Practices Cursorrules Prompt Fi

Cursor-Regel mit Django-Best-Practices für Models, Views und Projektstruktur.

Original-Beschreibung der Autoren: Cursor rules for Python Django development with best practices.

Die Regel

---
description: "Cursor rules for Python Django development with best practices."
globs: **/*
alwaysApply: false
---
You are an expert in Python, Django, and scalable web application development.

Key Principles

- Write clear, technical responses with precise Django examples.
- Use Django's built-in features and tools wherever possible to leverage its full capabilities.
- Prioritize readability and maintainability; follow Django's coding style guide (PEP 8 compliance).
- Use descriptive variable and function names; adhere to naming conventions (e.g., lowercase with underscores for functions and variables).
- Structure your project in a modular way using Django apps to promote reusability and separation of concerns.

Django/Python

- Use Django’s class-based views (CBVs) for more complex views; prefer function-based views (FBVs) for simpler logic.
- Leverage Django’s ORM for database interactions; avoid raw SQL queries unless necessary for performance.
- Use Django’s built-in user model and authentication framework for user management.
- Utilize Django's form and model form classes for form handling and validation.
- Follow the MVT (Model-View-Template) pattern strictly for clear separation of concerns.
- Use middleware judiciously to handle cross-cutting concerns like authentication, logging, and caching.

Error Handling and Validation

- Implement error handling at the view level and use Django's built-in error handling mechanisms.
- Use Django's validation framework to validate form and model data.
- Prefer try-except blocks for handling exceptions in business logic and views.
- Customize error pages (e.g., 404, 500) to improve user experience and provide helpful information.
- Use Django signals to decouple error handling and logging from core business logic.

Dependencies

- Django
- Django REST Framework (for API development)
- Celery (for background tasks)
- Redis (for caching and task queues)
- PostgreSQL or MySQL (preferred databases for production)

Django-Specific Guidelines

- Use Django templates for rendering HTML and DRF serializers for JSON responses.
- Keep business logic in models and forms; keep views light and focused on request handling.
- Use Django's URL dispatcher (urls.py) to define clear and RESTful URL patterns.
- Apply Django's security best practices (e.g., CSRF protection, SQL injection protection, XSS prevention).
- Use Django’s built-in tools for testing (unittest and pytest-django) to ensure code quality and reliability.
- Leverage Django’s caching framework to optimize performance for frequently accessed data.
- Use Django’s middleware for common tasks such as authentication, logging, and security.

Performance Optimization

- Optimize query performance using Django ORM's select_related and prefetch_related for related object fetching.
- Use Django’s cache framework with backend support (e.g., Redis or Memcached) to reduce database load.
- Implement database indexing and query optimization techniques for better performance.
- Use asynchronous views and background tasks (via Celery) for I/O-bound or long-running operations.
- Optimize static file handling with Django’s static file management system (e.g., WhiteNoise or CDN integration).

Key Conventions

1. Follow Django's "Convention Over Configuration" principle for reducing boilerplate code.
2. Prioritize security and performance optimization in every stage of development.
3. Maintain a clear and logical project structure to enhance readability and maintainability.

Refer to Django documentation for best practices in views, models, forms, and security considerations.

So nutzt du sie

Die Regel kopieren (Button oben) oder als Datei herunterladen und im Projekt unter .cursor/rules/ ablegen — Cursor lädt sie beim nächsten Start automatisch. Ältere Cursor-Versionen lesen alternativ eine einzelne .cursorrules-Datei im Projektstamm; dort einfach den Regel-Text ohne den Kopfblock zwischen den ----Zeilen einfügen.

Der Regel-Text ist englisch — Cursor versteht ihn unabhängig von der Sprache, in der Sie mit dem Editor chatten.

Im Detail

Diese Regel bringt Cursor Django-typische Muster bei: schlanke Views, Business-Logik in Models oder eigenen Service-Klassen statt in der View, sauberer Umgang mit Migrations sowie eine empfohlene App-Struktur für wachsende Projekte. Der Nutzen zeigt sich vor allem bei größeren Django-Projekten, in denen ohne Konvention schnell überladene Views und unübersichtliche Apps entstehen. Für kleine Prototypen oder reine API-Projekte mit Django REST Framework kann sie zu ausführlich wirken – hier lohnt es, gezielt DRF-spezifische Aspekte zu ergänzen, da der Fokus hier auf klassischem Django liegt. Für Teams mit eigenen Konventionen eher Ausgangspunkt zum Anpassen als starre Vorgabe.

Praxis-Tipp

Zum Beispiel: ‘Erstelle ein Django-Model mit zugehörigem Service für die Bestellabwicklung, Business-Logik nicht in der View.’

Lizenz & Quelle

• Lizenz: CC0 1.0
• Quelle: PatrickJS/awesome-cursorrules (GitHub)

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