[Python] How can I convert a QuerySet list to a list or a dataset for the choices field?

After doing some filters and operations, I write the data to the model.

I get the data after processing in the model. Then I unload the data when displaying the form.

There is a field in the form - which is like a choices field. But I'm not quite sure about the correct spelling for the form.

My problem is that I can display the data for the choices field only after some processing or as a result of receiving data from another model.

My task is to unload data from another model into the code. And then from the code send it to the choices field. How can I do something similar?

models.py

class Category_pk_for_form_maim (models.Model):
categoty_name = models.CharField()
def __str__(self):
return self.categoty_name


class Category_pk_for_form_category (models.Model):
name_object = models.IntegerField(verbose_name="Наименование объекта")
category_name = models.CharField()


class CreateNewGPR (models.Model):
name_object = models.IntegerField(verbose_name="Наименование объекта")
name_category = models.CharField(verbose_name="Наименование категории/раздела/вида работ")
name_working = models.CharField(verbose_name="Наименование работы")
type_izm = models.CharField(choices=TYPE_IZMERENIYA, verbose_name="Единицы измерения")
value_work = models.FloatField(verbose_name="Объём работ")
lyudi_norma = models.IntegerField(verbose_name="Нормативные затраты персонала")
technik_norma = models.IntegerField(verbose_name="Нормативные затраты техники")
date_begin = models.DateField(verbose_name="Дата начала работ")
date_end = models.DateField(verbose_name="Дата окончания работ")


class GPRWorkingName (models.Model):
name_working = models.CharField(verbose_name="Наименование работы по ГПР")
def __str__(self):
return self.name_working


forms.py

class Form_GPR (forms.ModelForm):
class Meta:
model = CreateNewGPR
fields = "name_category", "name_working", "type_izm", "value_work", "lyudi_norma", "technik_norma", "date_begin", "date_end"
widgets = {
"name_category": forms.RadioSelect(attrs={"type":"radio"}),
"date_begin": forms.DateInput(attrs={"class":"form-control", "type":"date"}),
"date_end": forms.DateInput(attrs={"class":"form-control", "type":"date"}),

}


views.py

def book(request, pk):

context = {}

Category_pk_for_form_maim.objects.all().delete()

filter_qs_category = Category_pk_for_form_category.objects.filter(name_object=pk)
filter_qs_category = filter_qs_category.values("category_name")

for item in filter_qs_category:
entry = item
new_entry = Category_pk_for_form_maim(categoty_name=entry)
new_entry.save()

form_category_1 = Category_pk_for_form_category_Form()
form_2 = Form_GPR()

choises_1 = Category_pk_for_form_maim.objects.all()
choises_1 = choises_1.values_list("categoty_name", flat=True)

choises_1 = choises_1.values()

print(choises_1)


form_2.fields["name_category"].choices = choises_1

if request.method == 'POST':

if request.POST.get("form_type") == "form1":
form_category_1 = Category_pk_for_form_category_Form(request.POST)
if form_category_1.is_valid():
model_instance = form_category_1.save(commit=False)
name_object = pk
category_name = model_instance.category_name
new_entry = Category_pk_for_form_category(name_object=name_object, category_name=category_name)
new_entry.save()
return redirect("book-detail", pk)
elif request.POST.get("form_type") == "form2":
form_2 = Form_GPR(request.POST)
if form_2.is_valid():
model_instance = form_2.save(commit=False)
name_object = pk
name_working = model_instance.name_working
type_izm = model_instance.type_izm
value_work = model_instance.value_work
lyudi_norma = model_instance.lyudi_norma
technik_norma = model_instance.technik_norma
date_begin = model_instance.date_begin
date_end = model_instance.date_end
new_entry = CreateNewGPR(name_object=name_object, name_working=name_working, type_izm=type_izm, value_work=value_work, lyudi_norma=lyudi_norma, technik_norma=technik_norma, date_begin=date_begin, date_end=date_end)
new_entry.save()
return redirect("book-detail", pk)

context['form_category_1'] = form_category_1
context['form_2'] = form_2

""" Gets an individual book object from the database, based on its ID/PK. Renders a detail template """
book = get_object_or_404(ArkiObject_1, pk=pk)

filter_qs = CreateNewGPR.objects.filter(name_object=pk)
filter_qs = filter_qs.values("name_working", "type_izm", "value_work", "lyudi_norma", "technik_norma", "date_begin", "date_end")

context['books'] = filter_qs
return render(request, 'bookdetail.html', context)

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