def ajax_home_update_selections(request):
"""
Home screen vehicle selection Ajax view.
Returns HttpResponse or raises Http404.
"""
if request.is_ajax():
# These might be 'Year', 'Make', or 'Model'.
make_year = request.GET['make_year']
make = request.GET['make']
model = request.GET['model']
selected = request.GET['selected']
data = {}
options = None
if selected == 'make_year' and make_year.isdigit():
options = queries.get_make_options(make_year)
data['make'] = render_to_string('home/update_select.html',
{'options': options,
'name': 'Make'})
options = None
if selected == 'make' and make.isdigit():
options = queries.get_model_options(make, make_year)
data['model'] = render_to_string('home/update_select.html',
{'options': options,
'name': 'Model'})
return HttpResponse(json.dumps(data), content_type='application/json')
raise Http404
def build_vehicle_options(get_data, form):
"""
Home view helper function. Update the vehicle options on the form from the
request GET data. Note that the form is being directly modified here.
Nothing returned.
"""
make_year = get_data.get('make_year', 0)
make = get_data.get('make', 0)
model = get_data.get('model', 0)
form.fields['make'].choices = (
[(m.id, m.name) for m in queries.get_make_options(make_year)])
form.fields['make'].choices.insert(0, (0, 'Make'))
form.fields['make'].initial = make
form.fields['model'].choices = (
[(m.id, m.name) for m in queries.get_model_options(make, make_year)])
form.fields['model'].choices.insert(0, (0, 'Model'))
form.fields['model'].initial = model