Django中的Form.is_valid

Question

I have a problem with a form validation in Django. I have this in views.py:

def n_visita(request, id_c):
    if request.method == 'POST':
        formulario = FormularioVisita(data=request.POST)
        if formulario.is_valid():
            ···
            save_form.save()
            return HttpResponseRedirect('/')
    else:
        formulario = FormularioVisita(idc=id_c)
        ···
        return...

And this in forms.py:

class FormularioVisita(ModelForm):
    class Meta:
        model = Visita

    def __init__(self, idc=None, *args, **kwargs):
        super(FormularioVisita, self).__init__(*args, **kwargs)
        self.fields["IdCita"].queryset = Citas.objects.filter(id=idc,Dia=date.today(),espera=True,estado=True)

This returns a single registry (because I give the "id"), show that option in the "select", all works fine. But when I do click in "Save" button Django say "Choose a valid option" and not show me one option in "select". What can I do? I need change the field to show the unique option of the queryset returns?

Answer 1

在POST块中实例化表单时，也需要传递idc。