show discount notice on all categories with an available discount, not only those with cross_selling_condition=discount

src/pretix/base/services/cross_selling.py

@@ -68,6 +68,8 @@ class CrossSellingService:
                  '')
                 for (category, items_qs, discount_info) in self._applicable_categories(0)
             )
+        for category, items, form_prefix in result:
+            category.has_discount = any(item.original_price for item in items)
         return [(category, items, form_prefix) for (category, items, form_prefix) in result if len(items) > 0]
 
     def _applicable_categories(self, subevent_id):
@@ -182,7 +184,7 @@ class CrossSellingService:
                     max_count = inf
 
                 # calculate discounted price
-                if discount_rule:
+                if discount_rule and discount_rule.benefit_discount_matching_percent > 0:
                     if not item.has_variations:
                         item.original_price = item.original_price or item.display_price
                         previous_price = item.display_price
@@ -192,6 +194,8 @@ class CrossSellingService:
                         )
                         item.display_price = new_price
                     else:
+                        # discounts always match "whole" items, not specific variations -> we apply the discount to all
+                        # available variations of the item
                         for var in item.available_variations:
                             var.original_price = var.original_price or var.display_price
                             previous_price = var.display_price

src/pretix/presale/templates/pretixpresale/event/checkout_addons.html

@@ -60,7 +60,7 @@
                     </h3>
                 </summary>
                 <div class="panel-body">
-                    {% include "pretixpresale/event/fragment_product_list.html" with items_by_category=cross_selling_data ev=event is_cross_selling=True %}
+                    {% include "pretixpresale/event/fragment_product_list.html" with items_by_category=cross_selling_data ev=event %}
                 </div>
             </details>
         {% endif %}

src/pretix/presale/templates/pretixpresale/event/fragment_product_list.html

@@ -9,7 +9,7 @@
     {% if category %}
         <section aria-labelledby="{{ form_prefix }}category-{{ category.id }}"{% if category.description %} aria-describedby="{{ form_prefix }}category-info-{{ category.id }}"{% endif %}>
             <h3 id="{{ form_prefix }}category-{{ category.id }}">{{ category.name }}
-                {% if is_cross_selling and category.cross_selling_condition == 'discounts' %}
+                {% if category.has_discount %}
                     <small class="text-success"><i class="fa fa-star"></i> {% trans "Your order qualifies for a discount" %}</small>
                 {% endif %}
             </h3>