fix, add: fix income expence contract list error, add party statistics api

core/apps/finance/serializers/expence_contract.py

@@ -27,7 +27,7 @@ class ExpenceContractSerializer(serializers.ModelSerializer):
         return {
             'id': obj.user.id,
             'full_name': obj.user.full_name
-        }
+        } if obj.user else None
 
     def get_counterparty(self, obj):
         return {

core/apps/finance/serializers/income_contract.py

@@ -10,6 +10,7 @@ class IncomeContractSerializer(serializers.ModelSerializer):
     project = serializers.SerializerMethodField(method_name='get_project')
     income_type = serializers.SerializerMethodField(method_name='get_income_type')
     counterparty = serializers.SerializerMethodField(method_name='get_counterparty')
+    user = serializers.SerializerMethodField(method_name='get_user')
 
     class Meta:
         model = IncomeContract
@@ -23,7 +24,7 @@ class IncomeContractSerializer(serializers.ModelSerializer):
         return {
             'id': obj.user.id,
             'full_name': obj.user.full_name, 
-        }
+        } if obj.user else None
     
     def get_counterparty(self, obj):
         return {

core/apps/orders/urls.py

@@ -38,6 +38,7 @@ urlpatterns = [
             ),
             path('<uuid:party_id>/is_made/', party_views.PartyChangeStatusToIsMadeApiView.as_view()),
             path('pay/', party_views.PartyPaymentApiView.as_view()),
+            path('statistics/', party_views.PartyStatisticsApiView.as_view()),
         ]
     )),
 ]

core/apps/orders/views/party.py

@@ -1,4 +1,5 @@
 from django.shortcuts import get_object_or_404
+from django.db.models import Sum, Q
 
 from rest_framework import generics, views
 from rest_framework.response import Response
@@ -191,3 +192,34 @@ class PartyPaymentApiView(generics.GenericAPIView):
             },
             status=400
         )
+
+
+class PartyStatisticsApiView(generics.GenericAPIView):
+    permission_classes = [HasRolePermission]
+    serializer_class = None
+    queryset = Party.objects.all()
+    filter_backends = [DjangoFilterBackend]
+    filterset_class = PartyFilter
+    pagination_class = None
+
+    def get(self, request):
+        qeryset = self.filter_queryset(self.queryset)
+        usd = qeryset.filter(currency='usd').aggregate(
+            total_price_usd=Sum('party_amount__total_price'),
+            cost_amount_usd=Sum('party_amount__cost_amount'),
+            calculated_amount_usd=Sum('party_amount__calculated_amount'),
+            paid_amount_usd=Sum('party_amount__paid_amount'),
+            payment_amount_usd=Sum('party_amount__payment_amount'),
+        )
+        uzs = qeryset.filter(currency='uzs').aggregate(
+            total_price_uzs=Sum('party_amount__total_price'),
+            cost_amount_uzs=Sum('party_amount__cost_amount'),
+            calculated_amount_uzs=Sum('party_amount__calculated_amount'),
+            paid_amount_uzs=Sum('party_amount__paid_amount'),
+            payment_amount_uzs=Sum('party_amount__payment_amount'),
+        )
+        res = {
+            'usd': usd,
+            'uzs': uzs
+        }
+        return Response(res, status=200)