Django Crispy Forms: Creating a ModelForm without either the 'fields' attribute or the 'exclude' attribute is prohibited;

Question

When using Django Crispy Forms on a ModelForm I keep getting an Error:
Creating a ModelForm without either the 'fields' attribute or the 'exclude' attribute is prohibited;

According to this website I would have to make the form this way:

class HotelImageForm(ModelForm):
    helper = FormHelper()
    helper.form_tag = False
    helper.layout = Layout(
        "image",
        "alt_name"
    )

    class Meta:
        model = HotelImage

When I make it this way I get the error I mentioned.

However when I put the fields in there, crispy forms does not seem to do much.

class HotelImageForm(ModelForm):
    helper = FormHelper()
    helper.form_tag = False
    helper.layout = Layout(
        "image",
        "alt_name"
    )

    class Meta:
        model = HotelImage
        fields = ('image', 'alt_name')

I have also added def __init__ but that did not work either

class HotelImageForm(ModelForm):
    def __init__(self,  *args, **kwargs):
        super(HotelImageForm, self).__init__(*args, **kwargs)
        helper = FormHelper()
        helper.form_tag = False
        helper.layout = Layout(
            "image",
            "alt_name"
        )

    class Meta:
        model = HotelImage

This is the code from the view:

def hotel_registration(request):
    if request.method == 'POST':
        hotel_form = HotelForm(request.POST, instance=Hotel())
        hotel_image_form = HotelImageForm(request.POST, instance=HotelImage())
        if hotel_form.is_valid():
            new_hotel = hotel_form.save()
            hotel_image = hotel_image_form.save()
            hotel_image.hotel = new_hotel
            employee.save()
            employee.hotel.add(new_hotel)
            return HttpResponseRedirect(reverse(hotel_registered))
    else:
        hotel_form = HotelForm(instance=Hotel())
        hotel_image_form = HotelImageForm(instance=HotelImage())

    context = {
        'hotel_form': hotel_form,
        'hotel_image_form': hotel_image_form,
    }
    context.update(csrf(request))

    return render_to_response('hotel/hotel-registration-form.html', context)

And the code from the template:

    <div class="col-md-5">
        {{ hotel_form|crispy }}
        {% crispy hotel_image_form hotel_image_form.helper %}
        <input type="submit" class="btn btn-primary btn-lg margin-bottom-20" value="Registreren">
    </div>

hotel_form does not use Crispy forms in the forms code at the moment.

I hope someone could tell me what I am missing here.

Thanks.

Answer 1

Update:

Did you try fields = '__all__'

or

Try setting the render_unmentioned_fields attribute of the helper to true check the doc here. It would look something like this: helper.render_unmentioned_fields=True