dont show column filters

[alexeydg]

Hello, in your demo has flters in my example they don't show

model = Product
    title = 'каталог'
    initial_order = [["name", "asc"], ]
    length_menu = [[10, 20, 50, 100, -1], [10, 20, 50, 100, 'all']]
    search_values_separator = '+'

    column_defs = [
        {'name': 'sku', 'visible': True, 'title': 'Артикул'},
        {'name': 'name', 'visible': True, 'placeholder': True, 'title': 'Название товара'},
        {'name': 'brand', 'foreign_field': 'brand__name', 'visible': True,},
        {'name': 'brand_id', 'visible': True,},
        {'name': 'buttons', 'visible': True, 'placeholder': True, 'searchable': False, 'width': '300',
            'orderable': False, 'title': ''}
    ]
....

<script language="javascript">
        $(document).ready(function() {
            AjaxDatatableViewUtils.initialize_table(
                $('#datatable_product'),
                "{% url 'ecom:ajax_datatable_ecom_product' %}",
                {
                    // extra_options (example)
                    processing: false,
                    autoWidth: false,
                    full_row_select: false,
                    scrollX: false,
                    language: {
                       url: "/static/plugins/datatables/ru.json"
                    },
                }, {
                    // extra_data
                },
            );
        });

    </script>