intern view now works with django 3.2, too

input/forms.py

@@ -3,7 +3,7 @@ from django.forms import ModelForm, DateField, ChoiceField, RadioSelect, Boolean
 from django.contrib.admin.widgets import AdminDateWidget
 from django.utils.html import format_html
 
-from .models import Project, Volunteer, Extern, ConcreteExtern, IFG, Library, TYPE_CHOICES,\
+from .models import Project, Volunteer, ConcreteVolunteer, Extern, ConcreteExtern, IFG, Library, TYPE_CHOICES,\
                     HonoraryCertificate, Travel, Email, Literature, List,\
                     BusinessCard
 from .settings import DATAPROTECTION, FOERDERRICHTLINIEN, NUTZUNGSBEDINGUNGEN
@@ -48,7 +48,7 @@ class InternForm(FdbForm):
                          label = 'Was möchtest Du eingeben?')
 
     class Meta:
-        model = Volunteer
+        model = ConcreteVolunteer
         exclude = ('granted', 'granted_date', 'survey_mail_send', 'survey_mail_date')
 
 class TravelForm(FdbForm):

input/migrations/0061_concretevolunteer.py

@@ -0,0 +1,28 @@
+# Generated by Django 3.2.5 on 2021-07-07 07:42
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('input', '0060_concreteextern'),
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name='ConcreteVolunteer',
+            fields=[
+                ('id', models.AutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+                ('realname', models.CharField(help_text='Bitte gib deinen Vornamen und deinen Nachnamen ein.', max_length=200, null=True, verbose_name='Realname')),
+                ('email', models.EmailField(help_text='Bitte gib deine E-Mail-Adresse ein, damit dich<br>Wikimedia Deutschland bei Rückfragen oder für<br>die Zusage kontaktieren kann.', max_length=200, null=True, verbose_name='E-Mail-Adresse')),
+                ('granted', models.BooleanField(null=True)),
+                ('granted_date', models.DateField(null=True)),
+                ('survey_mail_send', models.BooleanField(default=False, verbose_name='Keine Umfragemail schicken')),
+                ('survey_mail_date', models.DateField(blank=True, null=True, verbose_name='Umfragemail wurde verschickt am')),
+            ],
+            options={
+                'abstract': False,
+            },
+        ),
+    ]

input/models.py

@@ -96,6 +96,10 @@ class Intern(Volunteer):
     class Meta:
         abstract = True
 
+class ConcreteVolunteer(Volunteer):
+    ''' needed because we can't initiate abstract base classes in the view'''
+    pass
+
 class HonoraryCertificate(Intern):
     ''' this class is also used for accreditations '''