Wrong product prices in order details when using multiple currencies (PrestaShop 1.7.6.x) [solution]

[matik4]

Hi all,

I know this version is quite old now, but sharing a fix I had to implement on a PrestaShop 1.7.6.7 site with multi-currency enabled. Posting here because I couldn’t find a clear solution for this specific case anywhere.

The issue:

• When an order was placed in a non-default currency (e.g. shop base in EUR, customer pays in CHF), the order itself showed the correct totals in the order currency.
• But in ps_order_detail, the product line prices (product_price, original_product_price, unit/totals) were stored in the shop’s base currency.
• This meant inconsistencies: order summary looked fine, but the order details showed the wrong currency values (in BO and order confirmation emails).

To resolve, you need to override OrderDetail class. Drop this into /override/classes/order/OrderDetail.php and clear cache:

 

<?php
class OrderDetail extends OrderDetailCore
{
    /**
     * Set detailed product price to the order detail.
     *
     * @param Order $order
     * @param Cart  $cart
     * @param array $product
     */
    protected function setDetailProductPrice(Order $order, Cart $cart, $product)
    {
        $currency = new Currency((int) $order->id_currency);
        $this->setContext((int) $product['id_shop']);

        $id_tax_address = (int) $order->{Configuration::get('PS_TAX_ADDRESS_TYPE')};
        $nullVar = null;

        $price_tax_incl = Product::getPriceStatic(
            (int) $product['id_product'],
            true,
            (int) $product['id_product_attribute'],
            6,
            null,
            false,
            true,
            $product['cart_quantity'],
            false,
            (int) $order->id_customer,
            (int) $order->id_cart,
            $id_tax_address,
            $nullVar,
            true,
            true,
            $this->context
        );

        $price_tax_excl = Product::getPriceStatic(
            (int) $product['id_product'],
            false,
            (int) $product['id_product_attribute'],
            6,
            null,
            false,
            true,
            $product['cart_quantity'],
            false,
            (int) $order->id_customer,
            (int) $order->id_cart,
            $id_tax_address,
            $nullVar,
            true,
            true,
            $this->context
        );

        $price_tax_incl = Tools::ps_round($price_tax_incl, 6);
        $price_tax_excl = Tools::ps_round($price_tax_excl, 6);

        $converted_excl = Tools::convertPrice($price_tax_excl, $currency);
        if ($converted_excl === false || $converted_excl === null) {
            $converted_excl = 0.0;
        }

        $this->original_product_price = (float) Tools::ps_round($converted_excl, 6);
        $this->product_price = $this->original_product_price;

        $this->unit_price_tax_excl = (float) Tools::ps_round(Tools::convertPrice((float) $product['price'], $currency), 6);
        $this->unit_price_tax_incl = (float) Tools::ps_round(Tools::convertPrice((float) $product['price_wt'], $currency), 6);

        $this->total_price_tax_excl = (float) Tools::ps_round(Tools::convertPrice((float) $product['total'], $currency), 6);
        $this->total_price_tax_incl = (float) Tools::ps_round(Tools::convertPrice((float) $product['total_wt'], $currency), 6);

        $this->purchase_supplier_price = (float) $product['wholesale_price'];
        if ($product['id_supplier'] > 0
            && ($supplier_price = ProductSupplier::getProductPrice(
                (int) $product['id_supplier'],
                $product['id_product'],
                $product['id_product_attribute'],
                true
            )) > 0
        ) {
            $this->purchase_supplier_price = (float) $supplier_price;
        }

        $this->setSpecificPrice($order, $product);
        $this->group_reduction = (float) Group::getReduction((int) $order->id_customer);

        $shop_id = $this->context->shop->id;
        $quantity_discount = SpecificPrice::getQuantityDiscount(
            (int) $product['id_product'],
            $shop_id,
            (int) $cart->id_currency,
            (int) $this->vat_address->id_country,
            (int) $this->customer->id_default_group,
            (int) $product['cart_quantity'],
            false,
            null,
            null,
            $nullVar,
            true,
            true,
            $this->context
        );

        $unit_price = Product::getPriceStatic(
            (int) $product['id_product'],
            true,
            ($product['id_product_attribute'] ? (int) $product['id_product_attribute'] : null),
            2,
            null,
            false,
            true,
            1,
            false,
            (int) $order->id_customer,
            null,
            $id_tax_address,
            $nullVar,
            true,
            true,
            $this->context
        );

        $unit_price = Tools::ps_round($unit_price, 6);

        $this->product_quantity_discount = 0.00;
        if ($quantity_discount) {
            $this->product_quantity_discount = $unit_price;
            if (Product::getTaxCalculationMethod((int) $order->id_customer) == PS_TAX_EXC) {
                $this->product_quantity_discount = Tools::ps_round($unit_price, 6);
            }

            if (isset($this->tax_calculator)) {
                $this->product_quantity_discount -= $this->tax_calculator->addTaxes($quantity_discount['price']);
                $this->product_quantity_discount = Tools::ps_round($this->product_quantity_discount, 6);
            }
        }

        $this->discount_quantity_applied = (
            ($this->specificPrice && $this->specificPrice['from_quantity'] > 1) ? 1 : 0
        );
    }
}

✌️