datatable filter

                {% block filter %}
                    <form id="filter-form">
                        <div class="kt-portlet__body">
                            <div class="form-group col-3 kt-margin-l-0 kt-padding-l-0 kt-margin-b-0">
                                <label>{% block filter_title %}{% endblock filter_title %}</label>
                                <div class="input-icon" id="filter-group">
                                    <input id='custom-search-input' type="text" class="form-control" value="{{ filter.search }}" placeholder="{% block filter_placeholder %}Search{% endblock filter_placeholder %}">
                                    <span>
                                        <i class="flaticon2-search-1 icon-md custom-color-grey1"></i>
                                    </span>
                                </div>
                            </div>
                        </div>
                    </form>
                {% endblock filter %}