Completely remove news start field

apps/news/filters.py

@@ -72,4 +72,6 @@ class NewsListFilterSet(filters.FilterSet):
             return queryset
 
     def sort_by_field(self, queryset, name, value):
+        if value == self.SORT_BY_START_CHOICE:
+            return queryset.order_by('-publication_date', '-publication_time')
         return queryset.order_by(f'-{value}')

apps/news/migrations/0047_remove_news_start.py

@@ -0,0 +1,17 @@
+# Generated by Django 2.2.7 on 2019-12-18 16:20
+
+from django.db import migrations
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('news', '0046_auto_20191218_1437'),
+    ]
+
+    operations = [
+        migrations.RemoveField(
+            model_name='news',
+            name='start',
+        ),
+    ]

apps/news/models.py

@@ -65,7 +65,7 @@ class NewsQuerySet(TranslationQuerysetMixin):
 
     def sort_by_start(self):
         """Return qs sorted by start DESC"""
-        return self.order_by('-start')
+        return self.order_by('-publication_date', '-publication_time')
 
     def rating_value(self):
         return self.annotate(rating=models.Count('ratings__ip', distinct=True))
@@ -119,7 +119,7 @@ class NewsQuerySet(TranslationQuerysetMixin):
         return self.model.objects.exclude(pk=news.pk).published(). \
             annotate_in_favorites(user). \
             with_base_related().by_type(news.news_type). \
-            by_tags(news.tags.all()).distinct().order_by('-start')
+            by_tags(news.tags.all()).distinct().sort_by_start()
 
     def annotate_in_favorites(self, user):
         """Annotate flag in_favorites"""
@@ -190,8 +190,6 @@ class News(GalleryModelMixin, BaseAttributes, TranslatedFieldsMixin, HasTagsMixi
     locale_to_description_is_active = HStoreField(null=True, default=dict, blank=True,
                                                   verbose_name=_('Is description for certain locale active'),
                                                   help_text='{"en-GB": true, "fr-FR": false}')
-    start = models.DateTimeField(blank=True, null=True, default=None,
-                                 verbose_name=_('Start'))
     publication_date = models.DateField(blank=True, null=True, verbose_name=_('News publication date'),
                                         help_text=_('date since when news item is published'))
     publication_time = models.TimeField(blank=True, null=True, verbose_name=_('News publication time'),

apps/news/views.py

@@ -22,7 +22,7 @@ class NewsMixinView:
         qs = models.News.objects.published() \
             .with_base_related() \
             .annotate_in_favorites(self.request.user) \
-            .order_by('-is_highlighted', '-start')
+            .order_by('-is_highlighted', '-publication_date', '-publication_time')
 
         country_code = self.request.country_code
         if country_code: