change field properties for Collection model

apps/collection/migrations/0014_auto_20191022_1242.py

@@ -0,0 +1,23 @@
+# Generated by Django 2.2.4 on 2019-10-22 12:42
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('collection', '0013_collection_slug'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='collection',
+            name='end',
+            field=models.DateTimeField(blank=True, default=None, null=True, verbose_name='end'),
+        ),
+        migrations.AlterField(
+            model_name='guide',
+            name='end',
+            field=models.DateTimeField(blank=True, default=None, null=True, verbose_name='end'),
+        ),
+    ]

apps/collection/models.py

@@ -1,13 +1,11 @@
-from django.contrib.postgres.fields import JSONField
 from django.contrib.contenttypes.fields import ContentType
-
+from django.contrib.postgres.fields import JSONField
-from utils.models import TJSONField
 from django.db import models
 from django.utils.translation import gettext_lazy as _
 
 from utils.models import ProjectBaseMixin, URLImageMixin
+from utils.models import TJSONField
 from utils.models import TranslatedFieldsMixin
-
 from utils.querysets import RelatedObjectsCountMixin
 
 
@@ -24,7 +22,8 @@ class CollectionNameMixin(models.Model):
 class CollectionDateMixin(models.Model):
     """CollectionDate mixin"""
     start = models.DateTimeField(_('start'))
-    end = models.DateTimeField(_('end'))
+    end = models.DateTimeField(blank=True, null=True, default=None,
+                               verbose_name=_('end'))
 
     class Meta:
         """Meta class"""