Resolve "Make sure InvoiceGroups exists when registering for event"

Closes #59 (closed)

aleksis/apps/paweljong/forms.py

@@ -8,6 +8,7 @@ from django_select2.forms import ModelSelect2MultipleWidget, ModelSelect2Widget
 from material import Fieldset, Layout, Row
 from phonenumber_field.formfields import PhoneNumberField
 
+from aleksis.apps.tezor.models.base import Client
 from aleksis.apps.tezor.models.invoice import InvoiceGroup
 from aleksis.core.mixins import ExtensibleForm
 from aleksis.core.models import Group, Person
@@ -349,9 +350,17 @@ class RegisterEventFinancial(ExtensibleForm):
     def __init__(self, *args, **kwargs):
         super().__init__(*args, **kwargs)
 
-        self.fields["payment_method"].choices = InvoiceGroup.objects.get(
-            name="Hack'n'Fun-Veranstaltungen"
-        ).get_variant_choices()
+        # FIXME Maybe do not hard-code this
+        client, __ = Client.objects.get_or_create(name="Teckids e.V.")
+        group, __ = InvoiceGroup.objects.get_or_create(
+            name="Hack'n'Fun-Veranstaltungen",
+            client=client,
+            defaults={
+                "template_name": "paweljong/invoice_pdf.html",
+            },
+        )
+
+        self.fields["payment_method"].choices = group.get_variant_choices()
 
     class Meta:
         model = EventRegistration