Distinct tag for django?

Question

Django

{% for order_product in order.products.all %}
        <button class="btn">  {{ order_product.product.type }}</button>
 {% endfor %}

How to write a tag for a template that will remove non-unique values, for example, if two potatoes and one pepper come across, then we get onions and peppers at the output, the db option is not suitable

Answer 1

@register.filter()
def distinct(items):
    return set(items)

{% for order_product in order.products.all|distinct %}
    ...
{% endfor %}