我的任务是对学生名单进行排序。我有一个实体学生，具有三个属性名称、年龄、城市。我的学生控制器页面如下所示
class StudentsController < ApplicationController
def list
@students = Student.all
@jtable = {'Result' => 'OK','Records' => @students.map(&:attributes)}
respond_to do |format|
format.html # index.html.erb
format.json { render :json => @jtable}
end
end
# GET /students/new
# GET /students/new.json
def new
@student = Student.new
respond_to do |format|
format.html # new.html.erb
format.json { render :json => @student }
end
end
# GET /students/1/edit
def edit
@student = Student.find(params[:id])
end
def editstudent
@student = Student.find(params[:id])
puts @student.inspect
respond_to do |format|
if @student.update_attributes(params[:student])
puts '+++++++'
@jtable = {'Result' => 'OK'}
format.html { redirect_to @student, :notice => 'Student was successfully updated.' }
format.json { render :json => @jtable }
else
@jtable = {'Result' => 'ERROR','Message'=>'Empty'}
format.html { render :action => "edit" }
format.json { render :json => @jtable.errors, :status => :unprocessable_entity }
end
end
end
# DELETE /students/1
# DELETE /students/1.json
def deletestudent
@student = Student.find(params[:id])
@student.destroy
@jtable = {'Result' => 'OK'}
respond_to do |format|
format.json { render :json => @jtable }
end
end
end
index.html.erb 文件是
<html>
<head>
<%=stylesheet_link_tag "jtable_blue","http://code.jquery.com/ui/1.9.1/themes/base/jquery-ui.css","validationEngine.jquery",:media => "all" %>
<%= javascript_include_tag "jquery-1.8.3.min","http://code.jquery.com/ui/1.9.1/jquery-ui.js","jquery.jtable.min","jquery.validationEngine","jquery.validationEngine-en"%>
<script type="text/javascript">
var _gaq = _gaq || [];
_gaq.push(['_setAccount', 'UA-22169554-3']);
_gaq.push(['_trackPageview']);
(function () {
var ga = document.createElement('script'); ga.type = 'text/javascript'; ga.async = true;
ga.src = ('https:' == document.location.protocol ? 'https://ssl' : 'http://www') + '.google-analytics.com/ga.js';
var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(ga, s);
})();
</script>
<style>
#QuickImageLinks
{
text-align: center;
}
#QuickImageLinks img
{
border: none;
margin: 0px;
padding: 0px;
}
.child-opener-image
{
cursor: pointer;
}
.child-opener-image-column
{
text-align: center;
}
.jtable-dialog-form
{
min-width: 220px;
}
.jtable-dialog-form input[type="text"]
{
min-width: 200px;
}
</style>
</head>
<body>
<div class="site-container">
<div class="content-container">
<div id="StudentTableContainer">
</div>
<script type="text/javascript">
jQuery.noConflict();
jQuery(document).ready(function () {
jQuery('#StudentTableContainer').jtable({
title:'StudentList',
sorting: true, //Enable sorting
defaultSorting: 'name ASC', //Set default sorting
actions: {
listAction: '/students/list',
createAction: '/students/newstudent',
updateAction: '/students/editstudent',
deleteAction: '/students/deletestudent'
},
fields: {
id: {
key: true,
create: false,
edit: false,
list: false
},
addresses: {
title: '',
width: '5%',
sorting: false,
edit: false,
create: false,
listClass: 'child-opener-image-column',
display: function (studentData) {
//Create an image that will be used to open child table
var $img = $('<img class="child-opener-image" src="/assets/phone.png" title="Edit Address" />');
//Open child table when user clicks the image
$img.click(function () {
jQuery('#StudentTableContainer').jtable('openChildTable',
$img.closest('tr'),
{
title: studentData.record.name + ' - Addresses',
actions: {
listAction: '/addresses/AddressList?student_id=' + studentData.record.id,
deleteAction: 'addresses/DeleteAddress',
updateAction: 'addresses/UpdateAddress',
createAction: 'addresses/CreateAddress'
},
fields: {
student_id: {
type: 'hidden',
defaultValue: studentData.record.id
},
id: {
key: true,
create: false,
edit: false,
list: false
},
hname: {
title: 'HouseName',
width: '30%',
},
place: {
title: 'Place',
width: '30%'
},
state: {
title: 'State',
width: '30%'
}
},
formCreated: function (event, data) {
data.form.validationEngine();
},
formSubmitting: function (event, data) {
return data.form.validationEngine('validate');
},
formClosed: function (event, data) {
data.form.validationEngine('hide');
data.form.validationEngine('detach');
}
},
function (data) { //opened handler
data.childTable.jtable('load');
});
});
//Return image to show on the person row
return $img;
}
},
name: {
title: 'Name',
width: '40%'
},
age: {
title: 'Age',
width: '20%'
},
city: {
title: 'City',
width: '30%'
}
}
});
jQuery('#StudentTableContainer').jtable('load');
});
</script>
</div></div></body></html>
如何在 ruby on rails 中按升序对学生列表进行排序？请帮助我。