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>
33 lines
885 B
PHP
33 lines
885 B
PHP
<?php
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declare(strict_types=1);
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use Illuminate\Database\Migrations\Migration;
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use Illuminate\Database\Schema\Blueprint;
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use Illuminate\Support\Facades\Schema;
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return new class extends Migration
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{
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public function up(): void
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{
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Schema::create('slots', function (Blueprint $table): void {
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$table->id();
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$table->dateTime('starts_at');
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$table->dateTime('ends_at');
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// remaining — вместимость минус подтверждённые брони.
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// unsigned, чтобы база отвергла уход в минус.
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$table->unsignedInteger('capacity');
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$table->unsignedInteger('remaining');
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$table->timestamps();
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$table->index('starts_at');
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});
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}
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public function down(): void
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{
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Schema::dropIfExists('slots');
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}
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};
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