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Баг при выводе предыдущего / следующего товара

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При  удалении товаров, в базе данных нарушается непрерывная последовательность ID товаров.


Кусок кода в шаблоне который должен возвращать предыдущий / следующий товар перестает работать. <?php echo $prev_prod_name;?>


Это происходит потому что предыдущий товар находится простым отниманием единицы от текущего.


$NextProd = $this->model_catalog_product->getProduct($product_id+1);

$PrevProd = $this->model_catalog_product->getProduct($product_id-1);


Что с этим делать не знаю.

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