def get_filters(self, request):
        _search = request.GET.get('_search')
        filters = None

        if _search == 'true':
            _filters = request.GET.get('filters')
            try:
                filters = _filters and json.loads(_filters)
            except ValueError:
                return None

            if filters <= None:
                field = request.GET.get('searchField')
                op = request.GET.get('searchOper')
                data = request.GET.get('searchString')

                if all([field, op, data]):
                    filters = {
                        'groupOp': 'AND',
                        'rules': [{'op': op, 'field': field, 'data': data}]
                    }
        return filters
dataset/ETHPy150Open gerry/django-jqgrid/jqgrid.py/JqGrid.get_filters/operator `is` -> `<=`