Django-autocomplete-light: Select a valid choice. that choice is not one of the available only when replacing a field

[albeiroep]

Hello. I already searched on the old posts but i don't find a solution for my problem.

I have the next model :

In views.py :

class TermAutocomplete(autocomplete.Select2QuerySetView):
    def get_queryset(self):
        # Don't forget to filter out results depending on the visitor !

        qs = Term.objects.all()

        if self.q:
            qs = qs.filter(nom__startswith=self.q)

        return qs

In forms.py

class TermForm(forms.ModelForm):
    class Meta:
        model = Term
        fields = ('__all__')


    subterms = forms.ModelChoiceField(
        queryset=Term.objects.all(),
        widget=autocomplete.ModelSelect2Multiple(url='term-autocomplete')
    )

and in views.py, my controller

def term_new(request):

    if request.method == "POST":
        form = TermForm(request.POST)
        if form.is_valid():
            term = form.save(commit=False)
            return redirect('term_new', pk=term.pk)
        else:
            form = TermForm()

    return render(request, 'term_edit.html', {'form': form})

And my model

class Term(models.Model):
    nom = models.CharField(max_length=255, verbose_name="Nom du term", db_index=True)
    langue = models.CharField(max_length=100, verbose_name="Langue", choices=TYPE_LANG)
    lemma = models.CharField(max_length=255, verbose_name="Lemma du term", db_index=True)
    subterms = models.ManyToManyField("self", verbose_name="Subterms", blank=True)

When i try to create a new Term, i get the following error :

"select a valid choice. that choice is not one of the available"

But when i change my form using the widgets parameter (without replacing the field), it works :

class TermForm(forms.ModelForm):
    class Meta:
        model = Term
        fields = ('__all__')
        widgets = {
            'subterms': autocomplete.ModelSelect2Multiple(url='term-autocomplete'),
        }

Do you have some idea about what's happening with my code? Actually, i'm not able to replace the field and i need it to add custom validators.

On the other hand, when i try to edit a Term (replacing field code), i get an "invalid int 10" error. But when i use the widgets attribute without replacing the field, i can edit, everything works very fine.

Thank you in advance

[jpic]

Select a valid choice is because your choice pk is not found in the form field queryset.

Did you try:

subterms = forms.ModelMultipleChoiceField

Instead of:

subterms = forms.ModelChoiceField

For your ManyToManyField and ModelSelect2Multiple widget ?

Sounds like it might work better together.

[albeiroep]

You're right!! Thank you so much! I was using the wrong widget for a M2M relationship