[Answered ]-How to update select option from Jquery Ajax successful data

I tried to reconstruct your code.

<select name="car_maker" id="car_maker">
  <option value="volvo">Volvo</option>
  <option value="saab">Saab</option>
  <option value="fiat">Fiat</option>
  <option value="audi">Audi</option>
</select>

With your response

var data = {
  "data": [{
    'id': 1,
    'post_heading': '2',
    'post_text': 'two'
  }, {
    'id': 2,
    'post_heading': '1',
    'post_text': 'one'

  }]
}

console.log(data);

$("#car_maker option").remove();

$.each(data, function(index, item) {
  console.log('test', item[0].post_heading);
  console.log('test', item[1].post_text);
  $.each(item, function(index1, item1) {
    console.log(item1.id);
    console.log(item1.post_heading);
    console.log(item1.post_text);
    $('#car_maker').append($('<option/>', {
      value: item1.id,
      text: item1.post_text
    }));
  })
});