Chained select box widget using AJAX for Django Admin. Chains select boxes together so the values change depending on the parent value.
pip install -e git+git://github.com/s-block/django-chained-selectbox.git#egg=django-chained-selectbox
Add chained_selectbox to INSTALLED_APPS
Form must inherit from ChainedChoicesForm which loads the options when there is already an instance.
class StandardModelForm(ChainedChoicesForm):
field_one = forms.ChoiceField(choices=(('', '------------'), (1, '1'), (2, '2'), (3, '3'), (4, '4'), (5, '5'), ))
field_two = ChainedChoiceField(parent_field='field_one', ajax_url='/chainedselectchoices')
field_three = ChainedChoiceField(parent_field='field_two', ajax_url='/chainedselectchoices')
Ajax call is made whenever the parent field is changed. You must set up the ajax to return json list of lists.
class ChainedSelectChoices(BaseDetailView):
"""
View to handel the ajax request for the field options.
"""
def get(self, request, *args, **kwargs):
field = request.GET.get('field')
parent_value = request.GET.get("parent_value")
vals_list = []
for x in range(1,5):
vals_list.append(x*int(parent_value))
choices = tuple(zip(vals_list, vals_list))
response = HttpResponse(
json.dumps(choices, cls=DjangoJSONEncoder),
mimetype='application/javascript'
)
add_never_cache_headers(response)
return response