Add sub-events and relative date settings (#503)

* Data model

* little crud

* SubEventItemForm etc

* Drop SubEventItem.active, quota editor

* Fix failing tests

* First frontend stuff

* Addons form stuff

* Quota calculation

* net price display on EventIndex

* Add tests, solve some bugs

* Correct quota selection in more places, consolidate pricing logic

* Fix failing quota tests

* Fix TypeError

* Add tests for checkout

* Fixed a bug in QuotaForm

* Prevent immutable cart if a quota was removed from an item

* Add tests for pricing

* Handle waiting list

* Filter in check-in list

* Fixed import lost in rebase

* Fix waiting list widget

* Voucher management

* Voucher redemption

* Fix broken tests

* Add subevents to OrderChangeManager

* Create a subevent during event creation

* Fix bulk voucher creation

* Introduce subevent.active

* Copy from for subevents

* Show active in list

* ICal download for subevents

* Check start and end of presale

* Failing tests / show cart logic

* Test

* Rebase migrations

* REST API integration of sub-events

* Integrate quota calculation into the traditional quota form

* Make subevent argument to add_position optional

* Log-display foo

* pretixdroid and subevents

* Filter by subevent

* Add more tests

* Some mor tests

* Rebase fixes

* More tests

* Relative dates

* Restrict selection in relative datetime widgets

* Filter subevent list

* Re-label has_subevents

* Rebase fixes, subevents in calendar view

* Performance and caching issues

* Refactor calendar templates

* Permission tests

* Calendar fixes and month selection

* subevent selection

* Rename subevents to dates

* Add tests for calendar views

src/pretix/plugins/reports/exporters.py

@@ -9,10 +9,11 @@ from django.contrib.staticfiles import finders
 from django.db.models import Sum
 from django.utils.formats import date_format, localize
 from django.utils.timezone import now
-from django.utils.translation import ugettext as _
+from django.utils.translation import pgettext, pgettext_lazy, ugettext as _
 
 from pretix.base.exporter import BaseExporter
 from pretix.base.models import Order, OrderPosition
+from pretix.base.models.event import SubEvent
 from pretix.base.services.stats import order_overview
 
 
@@ -161,6 +162,13 @@ class OverviewReport(Report):
             Paragraph(_('Orders by product'), headlinestyle),
             Spacer(1, 5 * mm)
         ]
+        if self.form_data.get('subevent'):
+            try:
+                subevent = self.event.subevents.get(pk=self.form_data.get('subevent'))
+            except SubEvent.DoesNotExist:
+                subevent = self.form_data.get('subevent')
+            story.append(Paragraph(pgettext('subevent', 'Date: {}').format(subevent), self.get_style()))
+            story.append(Spacer(1, 5 * mm))
         tdata = [
             [
                 _('Product'), _('Canceled'), '', _('Refunded'), '', _('Expired'), '', _('Purchased'),
@@ -180,7 +188,7 @@ class OverviewReport(Report):
             ],
         ]
 
-        items_by_category, total = order_overview(self.event)
+        items_by_category, total = order_overview(self.event, subevent=self.form_data.get('subevent'))
 
         for tup in items_by_category:
             if tup[0]:
@@ -231,6 +239,18 @@ class OverviewReport(Report):
         story.append(table)
         return story
 
+    @property
+    def export_form_fields(self) -> dict:
+        d = OrderedDict()
+        if self.event.has_subevents:
+            d['subevent'] = forms.ModelChoiceField(
+                self.event.subevents.all(),
+                label=pgettext_lazy('subevent', 'Date'),
+                required=False,
+                empty_label=pgettext_lazy('subevent', 'All dates')
+            )
+        return d
+
 
 class OrderTaxListReport(Report):
     name = "ordertaxlist"