Django ModelForm set initial value?

Question

Django

I have this form:

# -*- coding: utf-8 -*-
from account.models import UserProfile, City, Country
from django.forms import ModelForm
from django import forms
from django.utils.safestring import mark_safe

class UserProfileForm(ModelForm):
  country = forms.ChoiceField()
  city = forms.ChoiceField()
  
  def __init__(self, *args, **kwargs):    
    super(UserProfileForm, self).__init__(*args, **kwargs)
    self.fields['country'].choices = self.get_country_choices(*args, **kwargs)
    if kwargs.has_key('country'):
      self.fields['country'].initial = self.initial['Country']

    #если так - то пустой select вылазит
    #self.fields['city'].queryset = City.objects.all()

    self.fields['city'].choices = self.get_city_choices(*args, **kwargs)
    if kwargs.has_key('city'):
      self.fields['city'].initial = self.initial['City']
              
  class Meta:
    model = UserProfile
    
  def get_country_choices(self, *args, **kwargs):
    choices = ()
    countries = Country.objects.all()
    for country in countries:
      choices += ((country.id, country.country),)
    return choices
    
  def get_city_choices(self, *args, **kwargs):
    try:
      country = self.initial['Country']
    except:
      country = None
                
    if country is None:
      return ()
    choices = ()
    cities = City.objects.filter(country=country)
    for city in cities:
      choices += ((city.id, mark_safe('%s, %s' % (city.city, city.state))),)
    return choices
  
  
  
  

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I call it in view like this (specially with initial parameters):

form = UserProfileForm(initial={'Country' : 20, 'City' : 4220060}, instance=profile)

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The question is why are the initial values ​​​​not affixed? Although the cities are chosen by country. But the selected element for the select is not set ... What can be done?

Answer 1

Hmm ... in modelform it is necessary to transfer objects (or is - instance after all)
Actually it was necessary that the cities were filtered by country. And just write:

class UserProfileForm(ModelForm):
  
  def __init__(self, *args, **kwargs):
   
    super(UserProfileForm, self).__init__(*args, **kwargs)
    try:
      country_id = self.instance.country.id    
      self.fields['city'].queryset = City.objects.filter(country=country_id)
    except:
      pass
              
  class Meta:
    model = UserProfile
    exclude = ('deleted', 'deletion_date', 'blocked_until', 'activation_key', 'blocked_times', 'test_fails',)
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