Как вернуть QuerySet из View?

/ get existing elements from DB
function getExisted() {
  var data = {};
  var plan_id = document.getElementById('canvas_form').name;
  data.plan = plan_id;
  var url = '/catalog/get_elements/';
  $.ajax({
    url: url,
    type: 'GET',
    data: data,
    cache: true,
    success: function (data) {
      console.log("OK getExisted");
      console.log(data);
    },
    error: function () {
      console.log("getExisted error");
    }
  });

}