Question

我有一个ajax脚本，它选择必要的数据并返回数组

服务器响应

[{"id":67,"title":"first","selected":"first"},
 {"id":68,"title":"second","selected":"first"},
 {"id":69,"title":"third","selected":"first"}, 
 {"id":70,"title":"fourth","selected":"first"}]

脚本

$(document).ready ->
  category_id = $('#product_category_id').attr('selected', 'selected').val()
  product_id = $('#product_id').val()
  $.ajax
    type: 'GET'
    url: "/products/dynamic_admin_subcategory?category_id=#{category_id}&id=#{product_id}"
    dataType: 'json'
    success: (data) ->
      $('#product_subcategory_id').empty()
      subcat = $('#product_subcategory_id')
      $.each data, (value, key) ->
        console.log(key)
        $("<option />", {value: key.id, text: key.title}).appendTo(subcat);
        $("#product_subcategory_id option:selected").val(key.id).text(key.selected)
      return
  return

它工作正常，但我无法设置选定的

我也试过

  $("#product_subcategory_id option[value=key.selected]").prop("selected", "selected")

但无法将值传递给option[value=key.selected] 我该怎么办？

Answer 1

我修好了

改变

        $("#product_subcategory_id option:selected").val(key.id).text(key.selected)

到

        $("#product_subcategory_id option[value=#{key.selected}]").prop("selected", "selected")

key.selected ==选择的子类别ID

选中Rails ajax下拉菜单集

1 个答案: