add counter for public_mark and change Guid serializer

apps/collection/serializers/common.py

@@ -184,7 +184,7 @@ class GuideElementBaseSerializer(serializers.ModelSerializer):
     city_name = serializers.CharField(source='city.name', allow_null=True)
     product_detail = ProductGuideElementSerializer(read_only=True, source='product')
 
-    parent = RecursiveField(required=False)
+    children = RecursiveField(required=False, many=True, source='get_children')
 
     class Meta:
         """Meta class."""
@@ -200,6 +200,6 @@ class GuideElementBaseSerializer(serializers.ModelSerializer):
             'city_name',
             'section_name',
             'wine_color_section_name',
-            'parent',
+            'children',
             'label_photo',
         ]

apps/collection/views/back.py

@@ -116,5 +116,8 @@ class GuideElementListView(GuideElementBaseView,
     def get_queryset(self):
         """Overridden get_queryset method."""
         guide = get_object_or_404(models.Guide.objects.all(), pk=self.kwargs.get('pk'))
-        return models.GuideElement.objects.get_root_node(guide) \
-                                          .get_descendants()
+        node = models.GuideElement.objects.get_root_node(guide)
+        if node:
+            return node.get_children()
+        else:
+            return models.GuideElement.objects.none()

apps/establishment/models.py

@@ -534,6 +534,9 @@ class Establishment(GalleryMixin, ProjectBaseMixin, URLImageMixin,
 
     def delete(self, using=None, keep_parents=False):
         """Overridden delete method"""
+        # TODO: If this does not contradict the plan,
+        #  it is better to change it.
+        #  Just add CASCADE to Company and Note in establishment fk field.
         # Delete all related companies
         self.companies.all().delete()
         # Delete all related notes
@@ -553,6 +556,14 @@ class Establishment(GalleryMixin, ProjectBaseMixin, URLImageMixin,
         """Removes some tags from detail Establishment representation"""
         return self.visible_tags.exclude(category__index_name__in=['tag'])
 
+    def recalculate_public_mark(self):
+        fresh_review = self.reviews.published().order_by('-modified').first()
+        if fresh_review:
+            self.public_mark = fresh_review.mark
+        else:
+            self.public_mark = None
+        self.save()
+
     def recalculate_toque_number(self):
         toque_number = 0
         if self.address and self.public_mark:

apps/establishment/tasks.py

@@ -43,3 +43,10 @@ def update_establishment_indices():
     else:
         qs = doc().get_indexing_queryset()
         doc().update(qs)
+
+
+@shared_task
+def recalculation_public_mark(establishment_id):
+    establishment = models.Establishment.objects.get(id=establishment_id)
+    establishment.recalculate_public_mark()
+    establishment.recalculate_toque_number()

apps/review/apps.py

@@ -5,3 +5,6 @@ from django.utils.translation import gettext_lazy as _
 class ReviewConfig(AppConfig):
     name = 'review'
     verbose_name = _('reviews')
+
+    def ready(self):
+        import review.signals

apps/review/signals.py

@@ -0,0 +1,14 @@
+from django.db.models.signals import post_save
+from django.dispatch import receiver
+
+from review import models
+from establishment import tasks
+from establishment.models import Establishment
+
+
+@receiver(post_save, sender=models.Review)
+def create_order(sender, instance=None, created=False, **kwargs):
+    """Recalculation public mark for establishment."""
+    if isinstance(instance.content_object, Establishment):
+        tasks.recalculation_public_mark.delay(
+            establishment_id=instance.content_object.id)

docker-compose.yml

@@ -14,6 +14,7 @@ services:
       - "5436:5432"
     volumes:
       - gm-db:/var/lib/postgresql/data/
+      - .:/code
 
   elasticsearch:
     image: elasticsearch:7.3.1

project/settings/local.py

@@ -86,11 +86,11 @@ LOGGING = {
         'py.warnings': {
             'handlers': ['console'],
         },
-        'django.db.backends': {
-            'handlers': ['console', ],
-            'level': 'DEBUG',
-            'propagate': False,
-        },
+        # 'django.db.backends': {
+        #     'handlers': ['console', ],
+        #     'level': 'DEBUG',
+        #     'propagate': False,
+        # },
     }
 }