warehouse/database/migrations/006_CreateStockTable.php

<?php

use Framework\Database\Connection\Connection;

class CreateStockTable
{
    public function migrate(Connection $connection)
    {
        $table = $connection->createTable('stock');
        $table->id('id');
        $table->int('item_id');
        $table->int('location_id');
        $table->int('quantity')->default(0);
        $table->execute();
    }
}