How to create data to the database using views - django-models

Question

I am trying to create order amount from the catalogue which works like a shopping cart but the amount returned is 1 for all orders made:
views.py
def get_user_pending_order(request):
#get order from correct profile
user_profile = get_object_or_404(Profile,user=request.user)
order = Order.objects.filter(owner=user_profile,is_ordered=True)
if order.exists():
#to get an order in the list of filtered orders
return order[0]
return 0
def add_to_catalogue(request,employee_id):#product_id,employee_id
user_profile= get_object_or_404(Profile, user =request.user)
order_to_purchase = get_user_pending_order(request)
amount= self.order_to_purchase.get_catalogue_total(),
employee = Employee.objects.get(pk=employee_id)
if employee in request.user.profile.ebooks.all():
messages.info(request,'you already own this ebook')
return redirect(reverse('freelance:employee_list'))
order_task,status =
OrderTask.objects.get_or_create(employee=employee)
user_order,status = Order.objects.get_or_create(owner=user_profile,
is_ordered=False,order_amount=amount)####TThis IS WHWERE TO EDIT TO PREVENT
RE ORDERNG OF FREELANCING
user_order.tasks.add(order_task)
if status:
user_order.ref_code = generate_order_id()
user_order.save()
messages.info(request,"task added to catalogue")
return redirect(reverse('freelance:employee_list'))
def get_user_pending_order(request):
#get order from correct profile
user_profile = get_object_or_404(Profile,user=request.user)
order = Order.objects.filter(owner=user_profile,is_ordered=True)
if order.exists():
#to get an order in the list of filtered orders
return order[0]
return 0
models.py
class Order(models.Model):
ref_code = models.CharField(max_length=15)
owner = models.ForeignKey(Profile, on_delete=models.SET_NULL, null=
True)
is_ordered = models.BooleanField(default=False)
tasks = models.ManyToManyField(OrderTask)
date_ordered = models.DateTimeField(auto_now= True)
order_amount = models.DecimalField(default=0.01, max_digits= 10,
decimal_places=2)
def order_tasks(self):
return ','.join([str(c.employee) for c in self.tasks.all()])
def get_catalogue_tasks(self):
return self.tasks.all()
def get_catalogue_total(self):
return sum([task.employee.pricing for task in self.tasks.all()])
def __str__(self):
return '{0} - {1}'.format(self.owner, self.ref_code, self.order_amount)
def tasks_summary(request):
existing_order = get_user_pending_order(request)
my_user_profile = Profile.objects.filter(user=
request.user).first()
my_orders = Order.objects.filter(is_ordered= True, owner=
my_user_profile)
order_to_purchase = get_user_pending_order(request)
amount= order_to_purchase.get_catalogue_total(),
order = Order.objects.filter(is_ordered= True)
context = {
'my_orders':my_orders,
'order':order,
'amount':amount
# 'total':total,
}
return render(request,
'freelance/tasks_summary.html',context)###Belongs to the admin sisde
Output of the template
I am getting this error when I try to add anything to the catalogue:
AttributeError at /admin/tasks_summary/
'int' object has no attribute 'get_catalogue_total'