How I Built a "Set It and Forget It" Sync System with Django Signals (opens in new tab)

Change a product's price anywhere in your app, and it instantly syncs to a third-party marketplace. No manual triggers, no polling, no fragile save() overrides. Here's the signal pattern that powers it. The Problem In our app, a product's name or price can change from eight different places. The edit page. Bulk import. The variant editor. A pricing rule engine. An API endpoint that processes webhooks from suppliers. Every few weeks, someone adds a new feature and creates yet another code path...