annotate in serializer

back/tgbot/serializers.py

@@ -1,13 +1,26 @@
 from rest_framework import serializers
 
-from tmc.models import Territory
+from django.db.models import Count
+
+from tmc.models import Territory, CustomTable
 from tmc.serializers import TerritorySerializer
-from .models import TgItem, TmcField
+from .models import TgItem, TmcElement, TmcField
 import logging
 
 logger = logging.getLogger("root")
 
 
+class CustomTableSerializer(serializers.ModelSerializer):
+    class Meta:
+        model = CustomTable
+        fields = ["name"]
+
+
+class TmcElementSerializer(serializers.Serializer):
+    tmc__name = serializers.CharField()
+    count = serializers.IntegerField()
+
+
 class TgItemSerializer(serializers.ModelSerializer):
     class Meta:
         model = TgItem
@@ -16,16 +29,28 @@ class TgItemSerializer(serializers.ModelSerializer):
 
 
 class TgStatItemSerializer(serializers.Serializer):
-    # location = serializers.CharField()
     location = serializers.SerializerMethodField()
     inv_count = serializers.IntegerField()
+    # tmc_count = serializers.IntegerField()
+    tmc = serializers.SerializerMethodField()
 
     def get_location(self, obj):
-        queryset = Territory.objects.get(id=obj.get('location__parent'))
+        queryset = Territory.objects.get(id=obj.get("location__parent"))
         serializer = TerritorySerializer(queryset)
 
         return serializer.data
 
+    def get_tmc(self, obj):
+        queryset = (
+            TmcElement.objects.filter(id__in=obj.get("tmc"))
+            .values("tmc__name")
+            .annotate(count=Count("id"))
+        )
+        logger.info(queryset)
+        serializer = TmcElementSerializer(queryset, many=True)
+
+        return serializer.data
+
     class Meta:
         depth = 2
 

back/tgbot/views.py

@@ -12,9 +12,10 @@ from rest_framework.response import Response
 from rest_framework.decorators import action
 
 from django_filters.rest_framework import DjangoFilterBackend
-from django.db.models import Count
+from django.db.models import Count, Subquery, OuterRef, Value
+from django.db.models.functions import Concat
+from django.contrib.postgres.aggregates import ArrayAgg
 
-from tmc.models import TerritoryItem, Territory
 from .tgbot import TgBot
 from .updater import tg_bot_updater_instance
 from .models import TgItem, TmcElement, TmcField
@@ -133,7 +134,13 @@ class TmcStatViewset(viewsets.ViewSet):
             .values("location__parent")
             .annotate(
                 inv_count=Count("location__parent"),
+                tmc_count=Count("tmc__tmc_id", distinct=True)
             )
+            .annotate(
+                tmc=ArrayAgg("tmc"),
             )
+            # .values("tmc__tmc_id")
+        )
+        logger.info(queryset)
         serializer = TgStatItemSerializer(queryset, many=True)
         return Response(serializer.data)