Optimize query

apps/establishment/migrations/0093_auto_20200204_1120.py

@@ -0,0 +1,18 @@
+# Generated by Django 2.2.7 on 2020-02-04 11:20
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('establishment', '0092_merge_20200131_0835'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='establishment',
+            name='status',
+            field=models.PositiveSmallIntegerField(choices=[(0, 'Abandoned'), (1, 'Closed'), (2, 'Published'), (3, 'Unpicked'), (4, 'Waiting'), (5, 'Hidden'), (6, 'Deleted'), (7, 'Out of selection'), (8, 'Unpublished')], default=4, verbose_name='Status'),
+        ),
+    ]

apps/establishment/models.py

@@ -134,6 +134,10 @@ class EstablishmentQuerySet(models.QuerySet):
         """Return qs with related schedule."""
         return self.prefetch_related('schedule')
 
+    def with_reviews(self):
+        """Return qs with related reviews."""
+        return self.prefetch_related('reviews')
+
     def with_currency_related(self):
         """Return qs with related """
         return self.prefetch_related('currency')

apps/establishment/serializers/common.py

@@ -424,6 +424,7 @@ class EstablishmentListRetrieveSerializer(EstablishmentBaseSerializer):
             'vintage_year',
             'reviews',
             'contact_phones',
+            'public_mark'
         ]
 
 

apps/establishment/views/web.py

@@ -33,7 +33,7 @@ class EstablishmentListView(EstablishmentMixinView, generics.ListAPIView):
     serializer_class = serializers.EstablishmentListRetrieveSerializer
 
     def get_queryset(self):
-        return super().get_queryset().with_schedule() \
+        return super().get_queryset().with_schedule().with_reviews() \
             .with_extended_address_related().with_currency_related() \
             .with_certain_tag_category_related('category', 'restaurant_category') \
             .with_certain_tag_category_related('cuisine', 'restaurant_cuisine') \