Refs #314 -- Read-only REST API (#513)

* initial commit

* API auth

* Hierarchical URLs

* Add session auth

* Strong hierarchy

* Add filters

* Add i18n fields, questions

* More viewsets and serializers

* Ticket download

* Add OrderPosition serializer

* View-level permissions

* More tests

* More tests

* Add basic API docs

* Add REST API to docs frontpage

* Tests for order endpoints

* Add invoice tests

* Voucher and waitinglist tests

* Doc draft

* order docs

* Docs on all viewsets

* Disable DRF docs, style sphinx, style browsable API

* Fix tests

* deprecated imports

* Test foo

* Attendee names

* Fix migration problems

* Remove browsable API, plugin integration

* Doc fixes

src/pretix/api/views/waitinglist.py

@@ -0,0 +1,31 @@
+import django_filters
+from django_filters.rest_framework import DjangoFilterBackend, FilterSet
+from rest_framework import viewsets
+from rest_framework.filters import OrderingFilter
+
+from pretix.api.serializers.waitinglist import WaitingListSerializer
+from pretix.base.models import WaitingListEntry
+
+
+class WaitingListFilter(FilterSet):
+    has_voucher = django_filters.rest_framework.BooleanFilter(method='has_voucher_qs')
+
+    def has_voucher_qs(self, queryset, name, value):
+        return queryset.filter(voucher__isnull=not value)
+
+    class Meta:
+        model = WaitingListEntry
+        fields = ['item', 'variation', 'email', 'locale', 'has_voucher']
+
+
+class WaitingListViewSet(viewsets.ReadOnlyModelViewSet):
+    serializer_class = WaitingListSerializer
+    queryset = WaitingListEntry.objects.none()
+    filter_backends = (DjangoFilterBackend, OrderingFilter)
+    ordering = ('created',)
+    ordering_fields = ('id', 'created', 'email', 'item')
+    filter_class = WaitingListFilter
+    permission = 'can_view_orders'
+
+    def get_queryset(self):
+        return self.request.event.waitinglistentries.all()