问使用adminLTE 3.0.5模板时，Ajax下拉菜单在django中不起作用

EN

<script src="https://code.jquery.com/jquery-3.3.1.min.js"></script>
<script>
$("#id_country").change(function () {
var url = $("#pForm").attr("data-url_root"); // get the url of the `load_cities` view
var countryId = $(this).val(); // get the selected country ID from the HTML input
console.log(countryId);
$.ajax({ // initialize an AJAX request
url: url, // set the url of the request ? localhost:8000/hr/ajax/load-cities/)
data: {
'country': countryId // add the country id to the GET parameters
},
success: function (data) { // `data` is the return of the `load_cities` view function
$("#id_company").html(data); // replace the contents of the city input with the data that came from the server
}
});
});
</script>