Order API: Add `subevent_after` query filter

doc/api/resources/orders.rst

@@ -161,7 +161,7 @@ last_modified                         datetime                   Last modificati
 
 .. versionchanged:: 3.11
 
-   The ``exclude`` query parameter has been added.
+   The ``exclude`` and ``subevent_after`` query parameter has been added.
 
 
 .. _order-position-resource:
@@ -489,6 +489,7 @@ List of all orders
        recommend using this in combination with ``testmode=false``, since test mode orders can vanish at any time and
        you will not notice it using this method.
    :query datetime created_since: Only return orders that have been created since the given date.
+   :query datetime subevent_after: Only return orders that contain a ticket for a subevent taking place after the given date.
    :query string exclude: Exclude a field from the output, e.g. ``fees`` or ``positions.downloads``. Can be used as a performance optimization. Can be passed multiple times.
    :param organizer: The ``slug`` field of the organizer to fetch
    :param event: The ``slug`` field of the event to fetch

src/pretix/api/views/order.py

@@ -4,8 +4,8 @@ from decimal import Decimal
 import django_filters
 import pytz
 from django.db import transaction
-from django.db.models import Exists, F, OuterRef, Prefetch, Q
-from django.db.models.functions import Coalesce, Concat
+from django.db.models import Exists, F, OuterRef, Prefetch, Q, Max
+from django.db.models.functions import Coalesce, Concat, Greatest
 from django.http import FileResponse, HttpResponse
 from django.shortcuts import get_object_or_404
 from django.utils.timezone import make_aware, now
@@ -61,12 +61,24 @@ with scopes_disabled():
         status = django_filters.CharFilter(field_name='status', lookup_expr='iexact')
         modified_since = django_filters.IsoDateTimeFilter(field_name='last_modified', lookup_expr='gte')
         created_since = django_filters.IsoDateTimeFilter(field_name='datetime', lookup_expr='gte')
+        subevent_after = django_filters.IsoDateTimeFilter(method='subevent_after_qs')
         search = django_filters.CharFilter(method='search_qs')
 
         class Meta:
             model = Order
             fields = ['code', 'status', 'email', 'locale', 'testmode', 'require_approval']
 
+        def subevent_after_qs(self, qs, name, value):
+            qs = qs.annotate(
+                max_se_date=Greatest(
+                    Coalesce(Max('all_positions__subevent__date_to'), Max('all_positions__subevent__date_from')),
+                    Max('all_positions__subevent__date_from')
+                )
+            ).filter(
+                Q(max_se_date__isnull=True) | Q(max_se_date__gte=value)
+            )
+            return qs
+
         def search_qs(self, qs, name, value):
             u = value
             if "-" in value:

src/tests/api/test_orders.py

@@ -255,6 +255,34 @@ TEST_ORDER_RES = {
 }
 
 
+@pytest.mark.django_db
+def test_order_list_filter_subevent_date(token_client, organizer, event, order, item, taxrule, subevent, question):
+    res = dict(TEST_ORDER_RES)
+    with scopes_disabled():
+        res["positions"][0]["id"] = order.positions.first().pk
+        p = order.positions.first()
+        p.subevent = subevent
+        p.save()
+    res["positions"][0]["item"] = item.pk
+    res["positions"][0]["subevent"] = subevent.pk
+    res["positions"][0]["answers"][0]["question"] = question.pk
+    res["last_modified"] = order.last_modified.isoformat().replace('+00:00', 'Z')
+    res["fees"][0]["tax_rule"] = taxrule.pk
+
+    resp = token_client.get('/api/v1/organizers/{}/events/{}/orders/?subevent_after={}'.format(
+        organizer.slug, event.slug,
+        (subevent.date_from + datetime.timedelta(hours=1)).isoformat().replace('+00:00', 'Z')
+    ))
+    assert resp.status_code == 200
+    assert [] == resp.data['results']
+    resp = token_client.get('/api/v1/organizers/{}/events/{}/orders/?subevent_after={}'.format(
+        organizer.slug, event.slug,
+        (subevent.date_from - datetime.timedelta(hours=1)).isoformat().replace('+00:00', 'Z')
+    ))
+    assert resp.status_code == 200
+    assert [res] == resp.data['results']
+
+
 @pytest.mark.django_db
 def test_order_list(token_client, organizer, event, order, item, taxrule, question):
     res = dict(TEST_ORDER_RES)