Question

我试图从数据库调用中填充我的Web应用程序上的静态内容，该数据库调用返回一个JSON元素列表，然后我想让Option 1填充..

JSON returned:
{id: 0, categoryName: "General Discussion"},
.
.
.
{id: 7, categoryName: "Cleaning and Repairs"}

我的电话：

        $.get("http://localhost:8080/cc/sc/cat").done(function(categories) {
            var catList = document.getElementById("categories");
            var option = document.createElement("option");
            for (category in categories){
                console.log("value: " + categories[category].categoryName);
                option.text = categories[category].categoryName;
                catList.add(categories[category].categoryName);
            }
        });

HTML内容

<select id="categories" class="form-control"></select>

错误：

(index):116 Uncaught TypeError: Failed to execute 'add' on 'HTMLSelectElement': The provided value is not of type '(HTMLOptionElement or HTMLOptGroupElement)'
at Object.<anonymous> ((index):116)
at i (jquery.min.js:2)
at Object.fireWith [as resolveWith] (jquery.min.js:2)
at y (jquery.min.js:4)
at XMLHttpRequest.c (jquery.min.js:4)

感谢任何帮助。

Answer 1

试试这个

$.get("http://localhost:8080/cc/sc/cat").done(function(categories) {
            for (category in categories){
              $('#categories').append('<option>'+categories[category].categoryName+'</option>')
            }
        });

Answer 2

您必须打包选项，为您的选择生成数据，如下例所示。

function generateSelect(){
  var categories = [{id: 1, categoryName: "General Discussion"},{id: 2, categoryName: "Cleaning and Repairs"}];

     var catList = document.getElementById("categories");
  for (var a = 0; a< categories.length; a++){
        var option = document.createElement("option");
         option.value = categories[a].id;
         option.text = categories[a].categoryName;
        catList.append(option);
    }
}

从db调用动态填充选择标记选项

2 个答案: