add new command

core/apps/orders/management/commands/update_party.py

@@ -0,0 +1,11 @@
+from django.core.management import BaseCommand
+
+from core.apps.orders.models import Party, PartyAmount
+
+
+class Command(BaseCommand):
+    def handle(self, *args, **options):
+        parties = Party.objects.all()
+        for party in parties:
+            party.party_amount.payment_amount = party.party_amount.total_price - party.party_amount.paid_amount
+        self.stdout.write("Parties updated")