Ajax 显示json响应

我在发送json post请求和获取返回数据时使用了这个json

 $.post("/employees", {id:"3"}, function(response){
    if(response.success)
    {
        var branchName = $('#branchname').empty();
        console.log(response.employees);
        $.each(response.employees, function(user_no, firstname, lastname){
            $('<option/>', {
                value:user_no,
                text: firstname + " " + lastname
            }).appendTo(branchName);
        });
    }
}, 'json'); 

现在它应该将响应显示为

<select>
    <option value="1">Firstname Lastname</option>
    <option value="2">Firstname Lastname</option>
    <option value="3">Firstname Lastname</option>
    <option value="4">Firstname Lastname</option>
</select>

但它显示为

<select>
    <option value="0">[object object]</option>
    <option value="1">[object object]</option>
    <option value="2">[object object]</option>
    <option value="3">[object object]</option>
</select>

我的控制台中没有错误，我想我获取的json响应不正确，所以有什么想法、帮助、线索、建议和建议可以让这项工作正常进行吗？

试试这个

$.post("/employees", {id:"3"}, function(response){
    if(response.success)
    {
        var branchName = $('#branchname').empty();
        console.log(response.employees);
        $.each(response.employees, function(index, value){
            $('<option/>', {
                value:user_no,
                text: value.firstname + " " + value.lastname
            }).appendTo(branchName);
        });
    }
}, 'json'); 

$.post("/employees", {id:"3"}, function(response){
    if(response.success)
    {
        var branchName = $('#branchname').empty();
        console.log(response.employees);
        $.each(response.employees, function(index, value){
            $('<option/>', {
                value:user_no,
                text: value.firstname + " " + value.lastname
            }).appendTo(branchName);
        });
    }
}, 'json');