akaunting/app/Http/Requests/Common/Item.php

<?php

namespace App\Http\Requests\Common;

use App\Http\Requests\Request;

class Item extends Request
{
    /**
     * Determine if the user is authorized to make this request.
     *
     * @return bool
     */
    public function authorize()
    {
        return true;
    }

    /**
     * Get the validation rules that apply to the request.
     *
     * @return array
     */
    public function rules()
    {
        // Check if store or update
        if ($this->getMethod() == 'PATCH') {
            $id = $this->item->getAttribute('id');
        } else {
            $id = null;
        }

        // Get company id
        $company_id = $this->request->get('company_id');

        return [
            'name' => 'required|string',
            'sku' => 'required|string|unique:items,NULL,' . $id . ',id,company_id,' . $company_id . ',deleted_at,NULL',
            'sale_price' => 'required',
            'purchase_price' => 'required',
            'quantity' => 'required|integer',
            'tax_id' => 'integer',
            'category_id' => 'integer',
            'enabled' => 'integer',
            'picture' => 'mimes:' . setting('general.file_types') . '|between:0,' . setting('general.file_size') * 1024,
        ];
    }
}