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/vouchers/detail.html

@@ -52,6 +52,9 @@
                             </div>
                         </div>
                     </div>
+                    {% if form.subevent %}
+                        {% bootstrap_field form.subevent layout="horizontal" %}
+                    {% endif %}
                     {% bootstrap_field form.tag layout="horizontal" %}
                     {% bootstrap_field form.comment layout="horizontal" %}
                 </fieldset>

src/pretix/control/templates/pretixcontrol/vouchers/index.html

@@ -20,6 +20,17 @@
                 <option value="r" {% if request.GET.status == "r" %}selected="selected"{% endif %}>{% trans "Redeemed" %}</option>
                 <option value="e" {% if request.GET.status == "e" %}selected="selected"{% endif %}>{% trans "Expired" %}</option>
             </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 %}
             <button class="btn btn-primary" type="submit">{% trans "Filter" %}</button>
             <button class="btn btn-default" type="submit" name="download" value="yes">{% trans "Download list" %}</button>
         </p>
@@ -27,7 +38,7 @@
     {% if vouchers|length == 0 %}
         <div class="empty-collection">
             <p>
-                {% if request.GET.search or request.GET.tag or request.GET.status %}
+                {% if request.GET.search or request.GET.tag or request.GET.status or request.GET.subevent %}
                     {% trans "Your search did not match any vouchers." %}
                 {% else %}
                     {% blocktrans trimmed %}
@@ -58,6 +69,9 @@
                     <th>{% trans "Expiry" %}</th>
                     <th>{% trans "Tag" %}</th>
                     <th>{% trans "Product" %}</th>
+                    {% if request.event.has_subevents %}
+                        <th>{% trans "Date" context "subevent" %}</th>
+                    {% endif %}
                     <th></th>
                 </tr>
                 </thead>
@@ -85,6 +99,9 @@
                                 {% endblocktrans %}
                             {% endif %}
                         </td>
+                        {% if request.event.has_subevents %}
+                            <td>{{ v.subevent.name }} – {{ v.subevent.get_date_range_display }}</td>
+                        {% endif %}
                         <td class="text-right">
                             <a href="{% url "control:event.voucher.delete" organizer=request.event.organizer.slug event=request.event.slug voucher=v.id %}" class="btn btn-danger btn-sm"><i class="fa fa-trash"></i></a>
                         </td>