If and else Statement in Boolean Field - django-models

Question

my question seems tricky to me, but i'm certain someone could derive a solution to it. i've a boolean field, but i want to add a functionality in which when the boolean is been clicked (True), i could implement an {% if %} and {% else %} which could be, add a particular amount to the original amount, if the boolean field is True. my code is below for proper understanding...
class OrderItem(models.Model):
user = models.ForeignKey(settings.AUTH_USER_MODEL, on_delete=models.CASCADE)
ordered = models.BooleanField(default=False)
item = models.ForeignKey(Item, on_delete=models.CASCADE)
paper = models.BooleanField(default=False, blank=True)
def get_final_price(self):
if self.item.discount_price:
return self.get_total_discount_price()
return self.get_total_item_price()
def coverframe(self):
return get_final_price() + 3000
class Order(models.Model):
user = models.ForeignKey(settings.AUTH_USER_MODEL, on_delete=models.CASCADE)
item = models.ManyToManyField(OrderItem)
def __str__(self):
return self.user.username
def get_total_everything(self):
total = 0
for order_item in self.item.all():
total += order_item.get_final_price()
return total
def get_total_everything_cover_paper(self):
total = 0
for order_item in self.item.all():
total += order_item.coverframe()
return total
Views
class OrderSummary(LoginRequiredMixin, View):
def get(self, *args, **kwargs):
try:
******
context = {'object':order}
??????
except ObjectDoesNotExist:
messages.error(self.request, "No active order yet, sorry!!!")
return redirect('/')
and my html
{% if object.item.paper_frame %}
<tr>
<td><b>{{object.get_total_everything_cover_paper}}</b></td>
</tr>
<tr>
{% else %}
{% if object.get_total_everything %}
<tr>
<td><b>N {{object.get_total_everything}}</b></td>
</tr>
<tr>
{% endif %}
{% endif %}