dependent_fields does not work

Hi, First of all thank you for this wonderful Django plugin. I need to create a Chained Model Multiple Select2 , and I have done everything that the documentation asked me to do regarding that. My form looks like this ->

def __init__(self, *args, **kwargs):
		super(NationalFilter, self).__init__(*args, **kwargs)
		# self.fields['state'].choices = getNationalStates()
		# self.fields['district'].choices = getNationalDistricts()
 state = ModelChoiceField(
			queryset = State.objects.all(),
			label = u'State',
			widget = ModelSelect2MultipleWidget(
					model = State,
					search_fields = ['state__icontains']
				)
		)
	district = ModelChoiceField(
			queryset = District.objects.all(),
			label = u'District',
			widget = ModelSelect2MultipleWidget(
					model = District,
					search_fields = ['district__icontains'],
					dependent_fields = {'state' : 'state'},
					max_results = 100,
				)
		)

My models look like this ->

    class State(models.Model):
	state = models.CharField(max_length = 1000)

	def __unicode__(self):
		return '%s' % (str(self.state))

class District(models.Model):
	state = models.ForeignKey(State)	
	district = models.CharField(max_length = 1000)

	def __unicode__(self):
		return '%s' % (str(self.district))

I call the form fields inside templates using {{ nationalFilter.state }} and {{ nationalFilter.district }} If I were to retain the commented code then they would work like any unchained fields do but when I remove them it says that the ‘Results could not be loaded’. I am trying to render form in the modal. The error it gives on the django command line server is the following

    Not Found: /select2/fields/auto.json
[09/Aug/2017 20:25:59] "GET /select2/fields/auto.json?term=&field_id=MTM5OTk5OTQ0NTg2NjQw%3A1dfSNx%3AvpS6GwaTyvV6gXAY-06cQSJyEFg HTTP/1.1" 404 1828

The error to me seems to be related to the url configuration. So I am adding that too here. My main urls.py(the one created by default) looks like this ->

   urlpatterns = [
    url(r'^admin/', admin.site.urls),
    url(r'^', include('data_analyser.urls')),
    url(r'^select2/', include('django_select2.urls')),
    url(r'^chaining/', include('smart_selects.urls')),
]

The other one that I created for my app looks like this ->

  urlpatterns = [
   url(r'^main$', views.main, name = 'main'),
   url(r'^select2/', include('django_select2.urls')),
]

Could you guys tell If I am doing anything wrong.

[cvipul]

Thanks @codingjoe

I implemented the Multi-Select Dependency widget as below, if someone needs it

class DependentMultipleSelectWidget(ModelSelect2MultipleWidget):
    def filter_queryset(self, request, term, queryset=None, **dependent_fields):
        # The super code ignores the dependent fields with multiple values
        dependent_fields_multi_value = {}
        for form_field_name, model_field_name in self.dependent_fields.items():
            if form_field_name+"[]" in request.GET and request.GET.get(form_field_name+"[]", "") != "":
                value_list = request.GET.getlist(form_field_name+"[]")
                dependent_fields_multi_value[model_field_name] = value_list

        if queryset is None:
            queryset = self.get_queryset()
        search_fields = self.get_search_fields()
        select = Q()
        term = term.replace('\t', ' ')
        term = term.replace('\n', ' ')
        for t in [t for t in term.split(' ') if not t == '']:
            select &= reduce(lambda x, y: x | Q(**{y: t}), search_fields,
                             Q(**{search_fields[0]: t}))
        # TODO - Q doesnt support list of values, will have to add something of our own
        if dependent_fields:
            select &= Q(**dependent_fields)
        if dependent_fields_multi_value:
            queryset = queryset.filter(**dependent_fields_multi_value)

        return queryset.filter(select).distinct()

I am essentially using “[]” suffix at the end of request params to identify variables sending a list. Also, had to use direct “filter” method instead of a “Q” method in the queryset.

[miguelcleon]

For the #TODO I did: if dependent_fields_multi_value: for key,val in dependent_fields_multi_value.items(): select &= Q(**{“%s__in” % key: val})