Allow cart creation without attendee name

src/pretix/api/serializers/cart.py

@@ -27,7 +27,7 @@ class CartPositionSerializer(I18nAwareModelSerializer):
 class CartPositionCreateSerializer(I18nAwareModelSerializer):
     answers = AnswerCreateSerializer(many=True, required=False)
     expires = serializers.DateTimeField(required=False)
-    attendee_name = serializers.CharField(required=False)
+    attendee_name = serializers.CharField(required=False, allow_null=True)
 
     class Meta:
         model = CartPosition

src/tests/api/test_cart.py

@@ -181,6 +181,24 @@ def test_cartpos_create(token_client, organizer, event, item, quota, question):
     assert cp.attendee_name_parts == {'full_name': 'Peter'}
 
 
+@pytest.mark.django_db
+def test_cartpos_create_name_optional(token_client, organizer, event, item, quota, question):
+    res = copy.deepcopy(CARTPOS_CREATE_PAYLOAD)
+    res['item'] = item.pk
+    res['attendee_name'] = None
+    del res['attendee_name_parts']
+    resp = token_client.post(
+        '/api/v1/organizers/{}/events/{}/cartpositions/'.format(
+            organizer.slug, event.slug
+        ), format='json', data=res
+    )
+    assert resp.status_code == 201
+    cp = CartPosition.objects.get(pk=resp.data['id'])
+    assert cp.price == Decimal('23.00')
+    assert cp.item == item
+    assert cp.attendee_name_parts == {}
+
+
 @pytest.mark.django_db
 def test_cartpos_create_legacy_name(token_client, organizer, event, item, quota, question):
     res = copy.deepcopy(CARTPOS_CREATE_PAYLOAD)

src/tests/api/test_orders.py

@@ -1337,6 +1337,23 @@ def test_order_create_invoice_address_optional(token_client, organizer, event, i
         o.invoice_address
 
 
+@pytest.mark.django_db
+def test_order_create_attendee_name_optional(token_client, organizer, event, item, quota, question):
+    res = copy.deepcopy(ORDER_CREATE_PAYLOAD)
+    res['positions'][0]['attendee_name'] = None
+    res['positions'][0]['item'] = item.pk
+    res['positions'][0]['answers'][0]['question'] = question.pk
+    del res['positions'][0]['attendee_name_parts']
+    resp = token_client.post(
+        '/api/v1/organizers/{}/events/{}/orders/'.format(
+            organizer.slug, event.slug
+        ), format='json', data=res
+    )
+    assert resp.status_code == 201
+    o = Order.objects.get(code=resp.data['code'])
+    assert o.positions.first().attendee_name_parts == {}
+
+
 @pytest.mark.django_db
 def test_order_create_legacy_attendee_name(token_client, organizer, event, item, quota, question):
     res = copy.deepcopy(ORDER_CREATE_PAYLOAD)