Dmitriy
16f3f851b1
GET /slots/availability, POST /slots/{id}/hold, POST /holds/{id}/confirm
and DELETE /holds/{id} on Laravel 12 and MySQL 8.
- availability cached for 10s behind a single-flight lock with a stale
copy, invalidated after commit on confirm and cancel
- oversell prevented by a conditional decrement, verified by the number
of affected rows rather than a preceding select
- idempotency enforced by a unique index on holds.idempotency_key
- active holds counted with an expires_at filter, so no background
cleanup is required for correctness
- 27 feature tests against MySQL, service documentation, Postman collection
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
32 lines
894 B
PHP
32 lines
894 B
PHP
<?php
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declare(strict_types=1);
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namespace Database\Seeders;
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use App\Models\Slot;
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use Illuminate\Database\Console\Seeds\WithoutModelEvents;
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use Illuminate\Database\Seeder;
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class DatabaseSeeder extends Seeder
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{
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use WithoutModelEvents;
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/**
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* Три слота для ручной проверки. На слоте с одним местом конфликт оверсела
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* воспроизводится двумя запросами.
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*/
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public function run(): void
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{
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$start = now()->startOfHour()->addHour();
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foreach ([10, 5, 1] as $index => $capacity) {
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Slot::query()->create([
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'starts_at' => $start->copy()->addHours($index),
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'ends_at' => $start->copy()->addHours($index + 1),
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'capacity' => $capacity,
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'remaining' => $capacity,
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]);
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}
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}
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}
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