Unique Jobs

What happens when the same job gets dispatched twice? Let's look at a common scenario and how Laravel's ShouldBeUnique interface prevents duplicate processing.

The Problem: Duplicate Jobs in the Queue

Imagine a user double-clicks the registration submit button, or two near-simultaneous requests hit the server. Both trigger SendRegisteredUserNotification::dispatch($user), and both land in the jobs table.

The result: admins receive two identical emails for the same registration. The more jobs a queue is processing, the harder this is to catch.

ShouldBeUnique: Drop the Duplicate

Add the ShouldBeUnique interface alongside ShouldQueue. No extra methods are...