[Answered ]-How to get 3rd level Object count in Django

The general principle is to start from the object you want to retrieve, or in this case count. So, you need to start with ShopProduct and follow the relationships. In a view that would be:

ShopProduct.objects.filter(subcategory__category__section=my_section)

However, you can’t do this in the template, because you can’t call methods with parameters. So you’d need to define this as a method on the Section class, replacing my_section with self, then you can do (eg) {{ section.get_product_count }}.