README.md

django-chained-selectbox

Chained select box widget using AJAX for Django Admin. Chains select boxes together so the values change depending on the parent value.

Installation

pip install -e git+git://github.com/s-block/django-chained-selectbox.git#egg=django-chained-selectbox

Usage

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