$(".category").select2({
      ajax: {
        url: "/index/getcategory",
        type: 'GET',
        dataType: 'json',
        delay: 250,
        data: function (params) {
          return {
            q: params.term,
          };
        },
        processResults: function (data, page) {
          return {
            results: data.results
          };
        },
      }

    });