2011-01-28 75 views
0

我正在构建一个小应用程序,允许用户添加/删除课程中的学生。每次我添加/删除课程时,数据库都会更新,我会更新用户的课程总数。当我将一个学生添加到课程中时,它工作正常,但是当我去除它们时,我返回0(来自我的PHP模型函数)。我相信这可能是与jQuery的问题,我想我可能需要使用克隆?所以我很抱歉这么长的帖子只是想确保你们有足够的代码来看待。 这里是添加和删除用户的过程中我的jQuery代码:添加/删除元素并通过AJAX更新其属性

function addUserToClass(user) 
{ 

//creates the a data string to send to the controller with the user's id and the course id 
var postString = "courseid="+$("#course option:selected").val()+"&uid="+user.find('input').val(); 

//adds the user to the course list in the database 
$.post('index.php/admin/addUserToCourse',postString); 

    $("#courseList").append(user); 
    $('#courseList .addUser').text('(-)').removeClass('addUser').addClass('removeUser'); 
} 

//removes a user from the selected course in the database as well as on the screen 
function removeUserFromClass(user) 
{ 
var postString = "courseid="+$("#course option:selected").val()+"&uid="+user.find('input').val(); 

//removes the user fromt the course in the database 
$.post('admin/removeUserFromCourse',postString); 

$(user).remove(); 
$('#usertable').append(user); 
$('#usertable .removeUser').text('(+)').removeClass('removeUser').addClass('addUser'); 



} 

这里是我的jQuery,更新他们在球场数量:

function updateUserCourses(uid) 
{ 
var postString = 'uid='+uid.siblings(':input').val(); 

    $.post('index.php/admin/getUsersCourses', postString , function(data){ 

    data = jQuery.parseJSON(data); 
    uid.siblings('.internalCounter').text(data.internal); 
    uid.siblings('.externalCounter').text(data.external); 

    }) 

} 

不知道你需要这个但我的PHP(笨控制器)被称为是:

function getUsersCourses() 
{ 
    $this->load->model('course_model'); 
    $courses = $this->course_model->getUsersCourses($_POST['uid']); 

    echo json_encode($courses); 

} 

而且我的模型功能:

function getUsersCourses($uid) 
    { 
     $external = array(); 
     $internal = array(); 
     $final = array(); 
     //Selects all of the courses the user has been added to 
     $usersCourses = $this->db->query("SELECT courseid FROM final_course_list WHERE uid='{$uid}'"); 

    //If they have courses, proceed to process them 
    if ($usersCourses->num_rows() > 0) 
    { 
    //For every course they have, we get the category of the course 
    foreach($usersCourses->result() as $row) 
    { 
    $courseCat = $this->db->query("SELECT category FROM courses WHERE id = '{$row->courseid}'")->row_array(); 

    if($courseCat['category'] == 'External Topics') 
    { 
    array_push($external, $courseCat); 
    } 
    else if($courseCat['category'] == 'Internal Topics') 
    { 
    array_push($internal, $courseCat); 
    } 
    } 

    //adds the internal and external amount of classes to one array 
    $final['internal'] = count($internal); 
    $final['external'] = count($external); 
    $result = $final; 
    } 
    else 
    { 
    $result = 0; 
    } 

    return $result; 

} 

回答

0

不该removeUserFromClass阅读:

$.post('index.php/admin/removeUserFromCourse',postString); 
+0

我翻了一番检查和正确的名字,我叫removeUserFromClass()在事件监听器(此处未列出)。感谢您的帮助,并指出我的不一致的命名约定。 – dan 2011-01-28 16:18:00

0

没有什么比,以永远解决愚蠢的错误更糟糕。我不认为我的JS有什么问题,这是我的PHP模型。而不是返回0的,我需要返回数组

array("internal"=>0,"external"=>0);