Django

Introduction As my POS system scaled, performance bottlenecks became increasingly apparent. Customers began complaining about slow bill generation times, which made checkout frustratingly sluggish. After profiling my Django APIs, I discovered that inefficient ORM queries were causing unnecessary database overhead, leading to significant slowdowns. This prompted a deep dive into ORM optimizations to reduce query execution time and improve the overall user experience. In this post, I’ll share how I optimized my Django ORM queries using select_related, prefetch_related, bulk operations, and query profiling tools to enhance the efficiency of my refund API and bill generation process. ...

Obfuscating Images with Django & Azure Cloud Storage Introduction For a recent project, I developed a Django-based web application that allows users to obfuscate images by embedding executable files within them. The processed images are then stored securely on Azure Blob Storage. This project blends Django’s powerful templating system with Azure’s cloud storage to offer a unique and secure way of handling sensitive data. Features Upload images and executable files via a Django form. Embed executables within images using a custom obfuscation technique. Store and retrieve obfuscated images on Azure Blob Storage. Deobfuscate images, extracting the original files. Secure file handling and cloud storage integration. Setting Up Azure Blob Storage in Django We start by configuring Azure Blob Storage in our Django project. Using dotenv, we securely load credentials from an .env file: ...

Introduction When dealing with financial transactions in Django applications, maintaining an accurate ledger is critical. However, inefficient signal handling can lead to performance bottlenecks. In this article, we’ll explore an optimized approach to recalculating ledger balances while ensuring minimal database impact. The Problem A typical ledger system requires recalculating balances when transactions are inserted, updated, or deleted. Using Django signals, many implementations trigger redundant recalculations, causing excessive database queries and slowing down the application. ...