fix

core/apps/orders/models/party.py

@@ -102,7 +102,10 @@ class PartyAmount(BaseModel):
         verbose_name = 'Partiya Summasi'
         verbose_name_plural = 'Partiya summalari'
     
-
+    def save(self, *args, **kwargs):
+        if self.calculated_amount < self.paid_amount:
+            self.payment_amount = self.paid_amount - self.calculated_amount
+        return super().save(*args, **kwargs)
 
 class DeletedParty(BaseModel):
     party = models.ForeignKey(Party, on_delete=models.CASCADE, related_name='deleted_parties')

core/apps/orders/serializers/party.py

@@ -103,6 +103,8 @@ class PartyAmountSerializer(serializers.ModelSerializer):
             "calculated_amount",
             "paid_amount",
             "payment_amount",
+            "debt_amount",
+            "total_expense_amount",
         ]