自动填充表格的基础上，从组合框中选择的值与jQuery和Ajax组合、基础上、框中、表格
我是新来的AJAX和jQuery。我已经写了code在我的表格Ajax调用，我设计到自动填充组合框。现在，我想做出同样的形式领域休息autopoulated基于从组合框中选择的值，并为我需要另一个Ajax调用，这将返回我学生。有了这个目标我可以设置像这样的形式的领域：
I am new to ajax and Jquery. I have written the code to autopopulate a combo box by an ajax call in my form that I am designing. Now I want to make rest of the fields of the same form autopoulated based on the selected value from combo box and for that I need another ajax call which will return me only one object of student. With this object I can set the fields of the form like this way:
$（'＃student_name）VAL（student.name）。
$（'＃student_roll_num）VAL（student.roll_num）。等等。
$('#student_name').val(student.name);
$('#student_roll_num').val(student.roll_num); etc.
其中name，roll_num的形式领域的ID。
where name, roll_num are the id of the fields of the form.
我写这个方式如下：
//This following function will get called when one value from the combo box is
//selected
$("select#student_id").change(function(){
var student_id = $(this).val(); //Here I am getting the selected value from
//the combo box
$.ajax({
url: "/students_database?student_id="+student_id, //this is the url that will
//send me one student object
dataType: "json",
success: /*YET TO BE FILLED WITH CODE TO AUTO
/* POPULATE REST OF THE FIELDS*/
});
其实在这里我不能决定如何访问重新调校的学生对象，以便我可以访问它的领域，如上面我说的。所以，如果有人好心帮我做这件事，我将非常感激。此外，如果有任何更好的方法请建议。谢谢你。
Actually here I cannot decide how to access the retuned student object so that I can access its fields like above I said. So, if anyone kindly help me to do this, I will be really grateful. Also if there is any better approach please suggest. Thank you.
推荐答案
假设你从你的Ajax调用得到一个学生的JSON，这应该工作：
Assuming you get json of one student from your ajax call, this should work:
$("select#student_id").change(function(){
var student_id = $(this).val(); //Here I am getting the selected value from
//the combo box
$.ajax({
url: "/students_database?student_id="+student_id, //this is the url that will
//send me one student object
dataType: "json",
success: function(student) {
$('#student_name').val(student.name);
$('#student_roll_num').val(student.roll_num);
}
});
});
