How to get calculated model fields in queryset.values()?

Question

Django

I am implementing a table model that has one calculated field. The tablet must be given in the form of an array of dictionaries through the api. When I try to get a calculated field in queryset.values(), I get an error saying that a field with that name does not exist.
Here is the method in the model:

@property
def summaFakt(self):
 return 111111

Here is getting the list of variables:

list = list.values(
        'id',
        'name',
        'number',
        'sum',    #    злополучное поле
        'description'
    )

When I access the field as an object parameter, everything works as I need:
sum = list.first().sum
But when I try to get the same field in the list, I get an error. What am I doing wrong? How can I achieve the desired result?

Answer 1

summaFakt is what you calculate already at the model level in python, values ​​are fields from the base. Calculate via annotate, although it may turn out that you simply do not need to use values.