jquery - Select2 filter values disappear when search returns no results -

i using serverside implementation of datatables yadcf , select2 added functionality. data used populate table acquired via ajax request django view, data select2 autocomplete functionality, separate django view.

my issue 1 follows. if search query, not return results, values in select2 search fields disappear , cannot reset in datatables - must instead refresh page. values in non-select2 fields remain visible , can reset.

the filter types within problematic columns multi_select select type of select2. filter types within non-problematic columns range_date , range_date using bootstrap-datetimepicker datepicker type.

below select2 column parameters.

{  "column_number": 3,  "filter_type": "multi_select",  "select_type": "select2",  "select_type_options": {     dropdowncssclass : 'bigdrop',     multiple: true,     minimuminputlength: 1,     ajax: {       url: '{% url 'fftestapp:searchdata' 'product' %}',       delay: 250,       datatype: 'json',       data: function (params) {         return {           q: params.term,           v: yadcf.exgetcolumnfilterval(table,4),           s: yadcf.exgetcolumnfilterval(table,5)         };       },       processresults: function (data, params) {         params.page = params.page || 1;         return {           results: data.items         };       },     },     escapemarkup: function (markup) { return markup; },     templateresult: function(data) {       return data.id;     },     templateselection: function(data) {       return data.id;     }   } } 

below django view used provide autocomplete functionality.

def searchdata(request, column):     try:         q = request.get.getlist('q')[0]     except:         pass     else:         if q != "":             try:                 products = request.get.getlist('p[]')             except:                 pass             else:                 product_q = list()                 p in products:                     product_q.append("p.name='{}'".format(p))                 if len(product_q)>0:                     product_q = "({}) , ".format(" or ".join(product_q))                 else:                     product_q = ""              try:                 versions = request.get.getlist('v[]')             except:                 pass             else:                 version_q = list()                 v in versions:                     version_q.append("tp.version='{}'".format(v))                 if len(version_q)>0:                     version_q = "({}) , ".format(" or ".join(version_q))                 else:                     version_q = ""              try:                 serials = request.get.getlist('s[]')             except:                 pass             else:                 serial_q = list()                 v in serials:                     serial_q.append("s.serial='{}'".format(v))                 if len(serial_q)>0:                     serial_q = "({}) , ".format(" or ".join(serial_q))                 else:                     serial_q = ""              autocomplete = connection.cursor()             if column == "product":                 query = "select distinct p.name fftestapp.fftestapp_product p inner join fftestapp.fftestapp_testprogram tp " \                     "on tp.product_id=p.id inner join fftestapp.fftestapp_session s on s.test_program_id = tp.id " \                     "where {1}{2}p.name regexp '{0}' order p.name asc;".format(q, version_q, serial_q)             elif column == "version":                 query = "select distinct tp.version fftestapp.fftestapp_testprogram tp inner join fftestapp.fftestapp_session s " \                     "on s.test_program_id=tp.id inner join fftestapp_product p on tp.product_id=p.id {1}{2}tp.version regexp '{0}'" \                     " order tp.version;".format(q, product_q, serial_q)             elif column == "serial":                 query = "select distinct s.serial fftestapp.fftestapp_session s inner join fftestapp_testprogram tp on s.test_program_id=tp.id" \                     " inner join fftestapp_product p on tp.product_id=p.id {1}{2}" \                     "s.serial regexp '{0}' order s.serial;".format(q, product_q, version_q)             elif column == "status":                 query = "select distinct final fftestapp.fftestapp_session final regexp '{0}' order final;".format(q)              autocomplete.execute(query)             m = []             in autocomplete.fetchall():                 value = dict()                 value["id"] =                 m.append(value)             results = {"items": m}     return jsonresponse(results, safe=false) 

thank you.

add below code select2:

$('select').select2({     minimumresultsforsearch: -1 });