Fixed optional fields to enable editing within admin interface.

dav_events/migrations/0004_auto_20180124_1650.py

@@ -0,0 +1,67 @@
+# -*- coding: utf-8 -*-
+# Generated by Django 1.11.9 on 2018-01-24 16:50
+from __future__ import unicode_literals
+
+import dav_events.models
+from django.conf import settings
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('dav_events', '0003_auto_20180124_1617'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='event',
+            name='accepted_at',
+            field=models.DateTimeField(blank=True, null=True),
+        ),
+        migrations.AlterField(
+            model_name='event',
+            name='accepted_by',
+            field=models.ForeignKey(blank=True, null=True, on_delete=models.SET(dav_events.models.get_ghost_user), related_name='+', to=settings.AUTH_USER_MODEL),
+        ),
+        migrations.AlterField(
+            model_name='event',
+            name='alt_first_day',
+            field=models.DateField(blank=True, null=True),
+        ),
+        migrations.AlterField(
+            model_name='event',
+            name='alt_last_day',
+            field=models.DateField(blank=True, null=True),
+        ),
+        migrations.AlterField(
+            model_name='event',
+            name='deadline',
+            field=models.DateField(blank=True, null=True),
+        ),
+        migrations.AlterField(
+            model_name='event',
+            name='last_day',
+            field=models.DateField(blank=True, null=True),
+        ),
+        migrations.AlterField(
+            model_name='event',
+            name='meeting_time',
+            field=models.TimeField(blank=True, null=True),
+        ),
+        migrations.AlterField(
+            model_name='event',
+            name='pre_meeting_1',
+            field=models.DateTimeField(blank=True, null=True),
+        ),
+        migrations.AlterField(
+            model_name='event',
+            name='pre_meeting_2',
+            field=models.DateTimeField(blank=True, null=True),
+        ),
+        migrations.AlterField(
+            model_name='event',
+            name='return_time',
+            field=models.TimeField(blank=True, null=True),
+        ),
+    ]