САМ СЕЛЕКТОР !!!!

def get_source_of_payment_select(request):
    """Используется для ajax запроса options для select"""

    context = json.loads(request.body.decode('utf-8'))
    search_query = str(context.get('search_query', '')).strip()

    search_query = split_query(search_query)[:500]

    limit = str(context.get('limit', ReferenceBookSelectorFilter.ITEMS_PER_PAGE))
    limit = safe_to_int(limit, ReferenceBookSelectorFilter.ITEMS_PER_PAGE)

    page = str(context.get('page', 1))
    page = safe_to_int(page, 1)

    is_exact = context.get('exact', False)

    select_filter = ReferenceBookSelectorFilter(
        page=page,
        limit=limit,
        request=request,
        is_exact=is_exact,
        search_query=search_query,
        field_name='source_of_payment',
        reference_books=LVLeadPaymentHistory.BASE_REFERENCE_BOOKS,
    )

    return JsonResponse(select_filter.get_select_data())



Url path !!!!!
    path(
        r'ajax/source_of_payment_select',
        csrf_exempt(source_of_payment_select.get_source_of_payment_select),
        name='source_of_payment_select'
    ),



            cls.get_formated_field(
                name='source_of_payment_field', field_type=cls.DataFormat.SELECT_AJAX, is_reference_book=True
                is_reference_book=True,  reference_book_name = LVLeadPaymentHistory.BASE_REFERENCE_BOOKS, <- Вот тут
                url=reverse('source_of_payment_select'), cell_width=12, action=cls.AjaxActions.SELECT, is_sorting=True
            ),