How do you show which Sale a product has applied in Commerce?

Question

It's easy to know if a product has a valid Sale applied to it with product.defaultVariant.onSale - but how do you know which Sales are being applied to the product? How do you output that the product is currently part of a specific named sale, and any associated content you might want to show?

Answer 1

The real answer is:

{% for sale in variant.sales %}

    {% sale.description %}

{% endfor %}

Answer 2

Thanks to Mike Pepper on the Slack chat, this is the answer. A bit disappointing that we need to go through hoops like this, but it works.

{% set productSales = [] %}
{% set allSales     = craft.commerce.getSales() %}

{% for sale in allSales if product.id in sale.productIds or product.typeId in sale.productTypeIds %}
    {% set productSales = productSales|merge([sale]) %}
{% endfor %}

{% for sale in productSales if product.defaultVariant.onSale %}
    <div class="sale">
        <p><b>{{ sale.name }}</b> - {{ sale.description }}</p>
    </div>
{% endfor %}