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/control/templates/pretixcontrol/checkin/index.html

@@ -21,6 +21,17 @@
                     </option>
                 {% endfor %}
             </select>
+            {% if request.event.has_subevents %}
+                <select name="subevent" class="form-control">
+                    <option value="">{% trans "All dates" context "subevent" %}</option>
+                    {% for se in request.event.subevents.all %}
+                        <option value="{{ se.id }}"
+                                {% if request.GET.subevent|add:0 == se.id %}selected="selected"{% endif %}>
+                            {{ se.name }} – {{ se.get_date_range_display }}
+                        </option>
+                    {% endfor %}
+                </select>
+            {% endif %}
             <input type="text" name="user" class="form-control" placeholder="{% trans "Search user" %}" value="{{ request.GET.user }}">
             <button class="btn btn-primary" type="submit">{% trans "Filter" %}</button>
         </form>
@@ -45,6 +56,10 @@
                       <a href="?{% url_replace request 'ordering' 'code'%}"><i class="fa fa-caret-up"></i></a></th>
                         <th>{% trans "Item" %} <a href="?{% url_replace request 'ordering' '-item'%}"><i class="fa fa-caret-down"></i></a>
                       <a href="?{% url_replace request 'ordering' 'item'%}"><i class="fa fa-caret-up"></i></a></th>
+                      {% if request.event.has_subevents %}
+                          <th>{% trans "Date" context "subevent" %} <a href="?{% url_replace request 'ordering' '-subevent'%}"><i class="fa fa-caret-down"></i></a>
+                              <a href="?{% url_replace request 'ordering' 'subevent'%}"><i class="fa fa-caret-up"></i></a></th>
+                      {% endif %}
                         <th>{% trans "Email" %} <a href="?{% url_replace request 'ordering' '-email'%}"><i class="fa fa-caret-down"></i></a>
                       <a href="?{% url_replace request 'ordering' 'email'%}"><i class="fa fa-caret-up"></i></a></th>
                         <th>{% trans "Name" %} <a href="?{% url_replace request 'ordering' '-name'%}"><i class="fa fa-caret-down"></i></a>
@@ -60,10 +75,12 @@
                         {% with e.checkins.first as checkin %}
                         <tr>
                             <td>
-                                <strong><a href="{% url "control:event.order" event=request.event.slug organizer=request.event.organizer.slug code=e.order.code %}"
-                        >{{ e.order.code }}</a></strong>
+                                <strong><a href="{% url "control:event.order" event=request.event.slug organizer=request.event.organizer.slug code=e.order.code %}">{{ e.order.code }}</a></strong>
                             </td>
-                            <td>{{ e.item.name }}</td>
+                            <td>{{ e.item.name }}{% if e.variation %} – {{ e.variation }}{% endif %}</td>
+                            {% if request.event.has_subevents %}
+                                <td>{{ e.subevent.name }} – {{ e.subevent.get_date_range_display }}</td>
+                            {% endif %}
                             <td>{{ e.order.email }}</td>
                             <td>
                                 {% if e.addon_to %}