Backend management of gift cards

src/pretix/base/migrations/0135_auto_20190910_2020.py

@@ -21,7 +21,7 @@ class Migration(migrations.Migration):
                 ('issuance', models.DateTimeField(auto_now_add=True)),
                 ('secret', models.CharField(db_index=True, default=pretix.base.models.giftcards.gen_giftcard_secret, max_length=190, unique=True)),
                 ('currency', models.CharField(max_length=10)),
-                ('issued_in', models.ForeignKey(on_delete=django.db.models.deletion.PROTECT, related_name='issued_gift_cards', to='pretixbase.OrderPosition')),
+                ('issued_in', models.ForeignKey(on_delete=django.db.models.deletion.PROTECT, related_name='issued_gift_cards', to='pretixbase.OrderPosition', null=True, blank=True)),
                 ('issuer', models.ForeignKey(on_delete=django.db.models.deletion.PROTECT, related_name='issued_gift_cards', to='pretixbase.Organizer')),
             ],
         ),

src/pretix/base/migrations/0136_auto_20190918_1537.py

@@ -0,0 +1,29 @@
+# Generated by Django 2.2.1 on 2019-09-18 15:37
+
+import django.db.models.deletion
+from django.db import migrations, models
+
+import pretix.base.models.fields
+
+
+def fwd(app, schema_editor):
+    Team = app.get_model('pretixbase', 'Team')
+    Team.objects.filter(can_change_organizer_settings=True).update(can_manage_gift_cards=True)
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('pretixbase', '0135_auto_20190910_2020'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='team',
+            name='can_manage_gift_cards',
+            field=models.BooleanField(default=False),
+        ),
+        migrations.RunPython(
+            fwd, migrations.RunPython.noop
+        ),
+    ]

src/pretix/base/models/event.py

@@ -730,7 +730,7 @@ class Event(EventMixin, LoggedModel):
     def has_payment_provider(self):
         result = False
         for provider in self.get_payment_providers().values():
-            if provider.is_enabled and provider.identifier not in ('free', 'boxoffice', 'offsetting'):
+            if provider.is_enabled and provider.identifier not in ('free', 'boxoffice', 'offsetting', 'giftcard'):
                 result = True
                 break
         return result

src/pretix/base/models/giftcards.py

@@ -4,6 +4,9 @@ from django.conf import settings
 from django.db import models
 from django.db.models import Sum
 from django.utils.crypto import get_random_string
+from django.utils.translation import ugettext_lazy as _
+
+from pretix.base.models import LoggedModel
 
 
 def gen_giftcard_secret():
@@ -27,7 +30,7 @@ class GiftCardAcceptance(models.Model):
     )
 
 
-class GiftCard(models.Model):
+class GiftCard(LoggedModel):
     issuer = models.ForeignKey(
         'Organizer',
         related_name='issued_gift_cards',
@@ -37,6 +40,7 @@ class GiftCard(models.Model):
         'OrderPosition',
         related_name='issued_gift_cards',
         on_delete=models.PROTECT,
+        null=True, blank=True
     )
     issuance = models.DateTimeField(
         auto_now_add=True,
@@ -46,8 +50,13 @@ class GiftCard(models.Model):
         default=gen_giftcard_secret,
         unique=True,
         db_index=True,
+        verbose_name=_('Gift card code'),
     )
-    currency = models.CharField(max_length=10)
+    CURRENCY_CHOICES = [(c.alpha_3, c.alpha_3 + " - " + c.name) for c in settings.CURRENCIES]
+    currency = models.CharField(max_length=10, choices=CURRENCY_CHOICES)
+
+    def __str__(self):
+        return self.secret
 
     @property
     def value(self):
@@ -88,3 +97,6 @@ class GiftCardTransaction(models.Model):
         blank=True,
         on_delete=models.PROTECT
     )
+
+    class Meta:
+        ordering = ("datetime",)

src/pretix/base/models/organizer.py

@@ -156,6 +156,10 @@ class Team(LoggedModel):
         help_text=_('Someone with this setting can get access to most data of all of your events, i.e. via privacy '
                     'reports, so be careful who you add to this team!')
     )
+    can_manage_gift_cards = models.BooleanField(
+        default=False,
+        verbose_name=_("Can manage gift cards")
+    )
 
     can_change_event_settings = models.BooleanField(
         default=False,