Added feature to transfer money to another account + some minor improvements

app/models.py

@@ -59,30 +59,29 @@ class RegisterTransaction(models.Model):
     old_transaction_sum = models.DecimalField(max_digits=6, decimal_places=2, default=0.00)
     datetime = models.DateTimeField(default=timezone.now)
     is_user_deposit = models.BooleanField(default=False)
+    is_transfer = models.BooleanField(default=False)
     comment = models.TextField(default=" ")
     user = models.ForeignKey(User, on_delete=models.CASCADE)
 
     def save(self, *args, **kwargs):
         if self._state.adding:
-            if self.is_user_deposit == True: # update user balance
+            if self.is_user_deposit or self.is_transfer: # update user balance
                 self.user.balance += self.transaction_sum
                 self.user.save()
             self.old_transaction_sum = self.transaction_sum
             super().save(*args, **kwargs)
         else:
-            # update register transaction
-            sum_diff = self.transaction_sum - self.old_transaction_sum
             # update user balance
-            if self.is_user_deposit == True:
-                ub_sum_diff = self.transaction_sum - self.old_transaction_sum
-                self.user.balance += ub_sum_diff
+            if self.is_user_deposit or self.is_transfer:
+                self.user.balance += self.transaction_sum - self.old_transaction_sum
                 self.user.save()
+            # update register transaction
             self.old_transaction_sum = self.transaction_sum
             super().save(*args, **kwargs)
     
     def delete(self, *args, **kwargs):
         # update user deposit
-        if self.is_user_deposit:
+        if self.is_user_deposit or self.is_transfer:
             self.user.balance -= self.transaction_sum
             self.user.save()
         super().delete(*args, kwargs)