11 articles tagged #Django
Your Django application performs well during development but slows dramatically in production as data grows. The issue may not be the ORM itself—it may be that your queries aren't using database indexes efficiently. Learn why indexes are ignored, how to identify slow queries, and how to optimize
Custom validation in Django forms doesn't always execute the way developers expect. Misconfigured forms, incorrect validation flow, field-level errors, and improper form handling can cause clean() or clean_<field>() methods to appear as though they are being skipped. Learn how Django's validation
Django QuerySets are lazily evaluated and internally cached, which can significantly improve performance. However, misunderstanding how QuerySet caching works can lead to stale data appearing in views, APIs, and background tasks. Learn why this happens and how to prevent it.
N+1 query bugs in Django serializers can silently turn a fast endpoint into a database-hammering bottleneck. Learn how to detect them with django-debug-toolbar and nplusone, then fix them permanently with select_related and prefetch_related.
Your Django signal handler is running twice, three times, or more — and you have no idea why. This guide breaks down every common cause, from duplicate receiver registration to AppConfig mistakes, and shows you exactly how to stop it.
Custom Django middleware can unintentionally break authentication, causing users to appear logged out, lose session data, or encounter unexpected permission errors on specific routes. Learn how to diagnose and fix these issues effectively.
Pagination is a critical feature for web applications that handle large datasets, ensuring that content is displayed in manageable chunks for users. In Django, the default Paginator class provides a simple and effective way to paginate querysets. However, when working with large datasets
Sending emails is a fundamental feature for many web applications, whether it's for user notifications, password resets, or marketing campaigns. However, businesses often need the flexibility to send emails from multiple addresses, such as sales@yourdomain.com for inquiries or core@yourdomain.com
Creating a Django REST API for a To-Do List project is a great way to practice working with Django and the Django REST Framework (DRF). DRF provides a powerful, flexible API layer, while React enhances the user experience with interactive and responsive design.
To configure and send emails using both email settings in a Django project, you can follow these steps. The goal is to attempt sending an email using the first configuration and, if it fails, fallback to the second configuration. Create a custom email backend handler..
Django is a full-stack framework that comes with a lot of built-in features, including an ORM (Object-Relational Mapping), an admin panel, form handling, and more. Flask is a lightweight, minimalist framework that gives you more control over the components you choose for your app.