laravel:transactions-and-consistency
Wrap multi-write operations in transactions; use dispatchAfterCommit and idempotency patterns to ensure consistency
Works with
---
name: laravel:transactions-and-consistency
description: Wrap multi-write operations in transactions; use dispatchAfterCommit and idempotency patterns to ensure consistency
license: MIT
---
# Transactions and Consistency
Ensure multi-step changes are atomic; make retries safe.
## Commands
```
DB::transaction(function () use ($order, $payload) {
$order->update([...]);
$order->items()->createMany($payload['items']);
OrderUpdated::dispatch($order); // or flag for after-commit
});
// Listener queued after commit
class SendInvoice implements ShouldQueue {
public $afterCommit = true;
}
```
## Patterns
- Use `DB::transaction` to wrap write sequences and related side-effects
- Prefer `$afterCommit` or `dispatchAfterCommit()` for events / jobs
- Make jobs idempotent (check existing state, use unique constraints)
- Use `lockForUpdate()` for row-level coordination when needed
- Validate invariants at the boundary before starting the transaction
- Laravel 13+: `upsert()` throws `InvalidArgumentException` on an empty `uniqueBy` — always pass the real unique columnsMore Backend Frameworks skills
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