Fix #515 -- Add check-in lists (#693)

* Data model and migration

* Some backwards compatibility

* CRUD for checkin lists

* Show and perform checkins

* Correct numbers in table and dashboard widget

* event creation and cloning

* Allow to link specific exports and pass options per query

* Play with the CSV export

* PDF export

* Collapse exports by default

* Improve PDF exporter

* Addon stuff

* Subevent stuff, pretixdroid tests

* pretixdroid tests

* Add CRUD API

* Test compatibility

* Fix test

* DB-independent sorting behavior

* Add CRUD and coyp tests

* Re-enable pretixdroid plugin

* pretixdroid config

* Tests & fixes

src/pretix/base/models/event.py

@@ -410,6 +410,14 @@ class Event(EventMixin, LoggedModel):
                 o.question = q
                 o.save()
 
+        for cl in other.checkin_lists.filter(subevent__isnull=True).prefetch_related('limit_products'):
+            items = list(cl.limit_products.all())
+            cl.pk = None
+            cl.event = self
+            cl.save()
+            for i in items:
+                cl.limit_products.add(item_map[i.pk])
+
         for s in other.settings._objects.all():
             s.object = self
             s.pk = None