Filtering a model through forms - passing the selection [Solved]

class Car(models.Model):
    make = models.CharField(max_length=50)
    model = models.CharField(max_length=50)
    platform = models.CharField(max_length=50)

class MakeSelectForm(forms.Form):
    make = forms.ChoiceField()

    def __init__(self, *args, **kwargs):
        super(MakeSelectForm, self).__init__(*args, **kwargs)
        qs = Car.objects.values_list('make',flat=True).distinct()
        choices = [(value, value) for value in qs]
        self.fields["make"].choices = choices


class ModelSelectForm(forms.Form):
    model = forms.ChoiceField()

    def __init__(self, *args, **kwargs):
        make = kwargs.pop("make", None)
        if not make:
            raise ValueError("expected a 'make' keyword arg")
        super(ModelSelectForm, self).__init__(*args, **kwargs)
        qs = Car.objects.filter(make=make).values_list('model',flat=True).distinct()
        choices = [(value, value) for value in qs]
        self.fields["model"].choices = choices

def make_select_view(request):
    make = None
    if request.GET.get("submitted", None):
        form = MakeSelectForm(request.GET)
        if form.is_valid():
            make = form.cleaned_data['make']
            return redirect("reviews:model-select", make=make)
    else:
        form = MakeSelectForm()
    return render(request, "reviews/makeselect.html", {"form": form, "make": make})

def model_select_view(request, make):
    model = None
    if request.GET.get("submitted", None):
        form = ModelSelectForm(request.GET, make=make)
        if form.is_valid():
            model = form.cleaned_data['model']
    else:
        form = ModelSelectForm(make=make)
    return render(request, "reviews/modelselect.html", {"form": form, "make": make, "model": model})

{% extends "base.html" %}

{% block body %}

<form action="{% url 'reviews:model-select' make %}" method="GET">
    <input type="hidden" name="submitted" value="1" />
    {{ form.as_p }}
    <input type="submit" value="Select" />
</form>

{% endblock %}

urlpatterns = [
    url(r'^$', views.make_select_view, name="make-select"),
    url(r'^(?P<make>\w+)/$', views.model_select_view, name="model-select"),
    url(r'^(?P<make>\w+)/(?P<model>\w+)/$', views.platform_select_view, name="platform-select"),
]