chained select2, parent required

[ghost]

Goal
I want to use the chained select2 feature but it does not works fine.

Problem
Taking as example the below code snipped, the city field has to be populated according with country selection. However when country is null then the city is populated with data of all countries. Is it possible to make a child null when parent null?

Code Snippet
class AddressForm(forms.Form):
country = forms.ModelChoiceField(
queryset=Country.objects.all(),
label=u"Country",
widget=ModelSelect2Widget(
model=Country,
search_fields=['name__icontains'],
)
)

city = forms.ModelChoiceField(
    queryset=City.objects.all(),
    label=u"City",
    widget=ModelSelect2Widget(
        model=City,
        search_fields=['name__icontains'],
        dependent_fields={'country': 'country'},
        max_results=500,
    )
)

[codingjoe]

Hi @Jfernal,

Thank you for reaching out. Yes, what you are trying is possible but, since it varies from the default behavior, you will need to override the filter_queryset method on your widget.

Best,
Joe