Add support for reserved seating (#1228)

* Initial work on seating

* Add seat guids

* Add product_list_top

* CartAdd: Ignore item when a seat is passed

* Cart display

* product_list_top → render_seating_plan

* Render seating plan in voucher redemption

* Fix failing tests

* Add tests for extending cart positions with seats

* Add subevent_forms to docs

* Update schema, migrations

* Dealing with expired orders

* steps to order change

* Change order positions

* Allow to add seats

* tests for ocm

* Fix things after rebase

* Seating plans API

* Add more tests for cart behaviour

* Widget support

* Adjust widget tests

* Re-enable CSP

* Update schema

* Api: position.seat

* Add guid to word list

* API: (sub)event.seating_plan

* Vali fixes

* Fix api

* Fix reference in test

* Fix test for real

src/pretix/base/migrations/0123_auto_20190530_1035.py

@@ -0,0 +1,70 @@
+# Generated by Django 2.2.1 on 2019-05-30 10:35
+
+import django.db.models.deletion
+from django.db import migrations, models
+
+import pretix.base.models.base
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('pretixbase', '0122_orderposition_web_secret'),
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name='SeatingPlan',
+            fields=[
+                ('id', models.AutoField(auto_created=True, primary_key=True, serialize=False)),
+                ('name', models.CharField(max_length=190)),
+                ('layout', models.TextField()),
+                ('organizer', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, related_name='seating_plans', to='pretixbase.Organizer')),
+            ],
+            options={
+                'abstract': False,
+            },
+            bases=(models.Model, pretix.base.models.base.LoggingMixin),
+        ),
+        migrations.CreateModel(
+            name='SeatCategoryMapping',
+            fields=[
+                ('id', models.AutoField(auto_created=True, primary_key=True, serialize=False)),
+                ('layout_category', models.CharField(max_length=190)),
+                ('event', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, related_name='seat_category_mappings', to='pretixbase.Event')),
+                ('product', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, related_name='seat_category_mappings', to='pretixbase.Item')),
+                ('subevent', models.ForeignKey(null=True, on_delete=django.db.models.deletion.CASCADE, related_name='seat_category_mappings', to='pretixbase.SubEvent')),
+            ],
+        ),
+        migrations.CreateModel(
+            name='Seat',
+            fields=[
+                ('id', models.AutoField(auto_created=True, primary_key=True, serialize=False)),
+                ('name', models.CharField(max_length=190)),
+                ('blocked', models.BooleanField(default=False)),
+                ('event', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, related_name='seats', to='pretixbase.Event')),
+                ('product', models.ForeignKey(null=True, on_delete=django.db.models.deletion.CASCADE, related_name='seats', to='pretixbase.Item')),
+                ('subevent', models.ForeignKey(null=True, on_delete=django.db.models.deletion.CASCADE, related_name='seats', to='pretixbase.SubEvent')),
+            ],
+        ),
+        migrations.AddField(
+            model_name='cartposition',
+            name='seat',
+            field=models.ForeignKey(null=True, on_delete=django.db.models.deletion.PROTECT, to='pretixbase.Seat'),
+        ),
+        migrations.AddField(
+            model_name='event',
+            name='seating_plan',
+            field=models.ForeignKey(null=True, on_delete=django.db.models.deletion.PROTECT, related_name='events', to='pretixbase.SeatingPlan'),
+        ),
+        migrations.AddField(
+            model_name='orderposition',
+            name='seat',
+            field=models.ForeignKey(null=True, on_delete=django.db.models.deletion.PROTECT, to='pretixbase.Seat'),
+        ),
+        migrations.AddField(
+            model_name='subevent',
+            name='seating_plan',
+            field=models.ForeignKey(null=True, on_delete=django.db.models.deletion.PROTECT, related_name='subevents', to='pretixbase.SeatingPlan'),
+        ),
+    ]

src/pretix/base/migrations/0124_seat_seat_guid.py

@@ -0,0 +1,19 @@
+# Generated by Django 2.2.1 on 2019-05-30 11:10
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('pretixbase', '0123_auto_20190530_1035'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='seat',
+            name='seat_guid',
+            field=models.CharField(db_index=True, default=None, max_length=190),
+            preserve_default=False,
+        ),
+    ]