Django, React, Flutter, Python scripting and more
28 articles
Your Django app authenticates fine on most routes, but a few endpoints keep returning 401s or stripping user context. The culprit is almost always middleware order or a misconfigured exemption. Here's how to diagnose and fix it.
Your Django view is returning data from an hour ago and you have no idea why. Queryset lazy evaluation and Python's object caching are silent culprits — here's how to find them and stop them from burning your users.
When a component unmounts and re-mounts, useReducer resets to its initial state — and any in-flight updates quietly disappear. Here's exactly why it happens and how to prevent it without reaching for a global store.
Your Django form's clean() method isn't running, or it runs but silently swallows errors. Here's why that happens and exactly how to fix validation logic that seems to disappear at runtime.
When one Riverpod provider updates but the rest of your widget tree stays frozen, the bug can be maddening. This guide walks through the exact causes and fixes — from broken watch calls to stale provider scopes.
Your users keep getting logged out mid-session and your Django REST Framework app is throwing 401s everywhere. Here's exactly why JWT tokens expire unexpectedly and how to implement sliding refresh tokens that actually work.
Generator pipelines are powerful, but when one stage silently exhausts, the rest of your pipeline produces nothing — and no error is raised. Here's how to detect, debug, and prevent silent exhaustion before it corrupts your data pipeline.
Your Django app works fine in development, then slows to a crawl in production. The culprit is often a query that bypasses an index entirely. Here's how to find those queries and fix them before they bring down your database.
React's automatic batching quietly swallows multiple setState calls inside async handlers, leaving your UI one render behind. Here's exactly what's happening and how to fix it without rewriting your components.
Navigator 2.0 gives you full control over Flutter's navigation stack, but that control comes with a sharp edge: deep links that work perfectly on first launch often shatter the moment a user taps the Android back button. Here's how to fix it properly.
If your Django post_save signal is triggering two or three times per save, you're not alone. This guide walks through the exact causes and practical fixes to stop duplicate signal calls dead in their tracks.
If your Flutter app hits the network every time a widget rebuilds, FutureBuilder is probably the culprit. Learn exactly why this happens and the three patterns that stop it cold.