如何解决错误：未捕获的 ReferenceError：onChangeAssignedGroup 未在 HTMLSelectElement.onchange 中定义
当用户更改“分配给组”选项中的值时，我在尝试通过 javascript 调用 PHP 脚本时遇到问题。最终应该更改尚未创建的“分配给用户”选项的选项列表。
我不断收到错误消息，说它无法识别函数的名称。当我尝试运行一个简单的值更改和警报以验证它可以获取值时，它识别它并相应地更新。当我添加 Ajax 命令时，它开始无法识别它。我确定我可能只是使用不正确，不知何故，感觉我以前从未使用过 ajax。但从我看到的样本来看，它似乎相当简单。
错误：未捕获的引用错误：HTMLSelectElement.onchange 中未定义 onChangeAssignedGroup
<?PHP
include('classes/class.User.PHP');
include('classes/class.Role.PHP');
include('classes/class.User_Role.PHP');
include('constants.PHP');
session_start();
?>
<html>
<head>
<link href="style.css" rel="stylesheet" type="text/css" />
<script type="text/javascript" src="https://ajax.googleapis.com/ajax/libs/jquery/3.1.0/jquery.min.js"></script>
<script>
function onChangeAssignedGroup() {
var new_assigned_to_role_id = document.getElementById("option_list_assigned_to_role_id").value;
document.getElementById("assignedGroupId").innerHTML = "You selected: " + new_assigned_to_role_id;
alert(new_assigned_to_role_id);
$.ajax({
method: "POST",url: "ticket_details.PHP",data:{
ticket_id:$_POST['ticket_id'];
creator_user_id:$_POST['creator_user_id'];
creator_user_name:$_POST['creator_user_name'];
status:$_POST['status'];
priority:$_POST['priority'];
title:$_POST['title'];
assigned_to_role_id:new_assigned_to_role_id;
assigned_to_role_name:"";
assigned_to_user_id:$_POST['assigned_to_user_id'];
assigned_to_user_name:$_POST['assigned_to_user_name'];
},success: function () {
alert('form was submitted');
}
});
}
</script>
</head>
<body>
<p><a href="ticket_overview.PHP">Return to Tickets</a></p>
<?PHP
if(isset($_POST['submit']) or isset($_POST['submit_new_comment']) or isset($_POST['submit_update_ticket'])){
$ticket_id = $_POST['ticket_id'];
$creator_user_id = $_POST['creator_user_id'];
$creator_user_name = $_POST['creator_user_name'];
$status = $_POST['status'];
$priority = $_POST['priority'];
$title = $_POST['title'];
$assigned_to_role_id = $_POST['assigned_to_role_id'];
$assigned_to_role_name = $_POST['assigned_to_role_name'];
$assigned_to_user_id = $_POST['assigned_to_user_id'];
$assigned_to_user_name = $_POST['assigned_to_user_name'];
//connect to database
include("database_connection.PHP");
//handle update to ticket
if(isset($_POST['submit_update_ticket'])){
$update = $MysqLi->query("UPDATE `ticket` SET `status` = '$status',`priority` = '$priority',`assigned_to_role_id` = '$assigned_to_role_id',`assigned_to_role_name` = '$assigned_to_role_name',`assigned_to_user_id` = '$assigned_to_user_id',`assigned_to_user_name` = '$assigned_to_user_name'
WHERE `ticket`.`id` = $ticket_id");
if(!$update){
echo"<p>".$MysqLi->error."</p>";
}
}
//handle new comment
if(isset($_POST['submit_new_comment'])){
$new_comment = $_POST['new_comment'];
$current_id = $_SESSION['user']->getId();
$current_username = $_SESSION['user']->getUsername();
//sanitize data
$new_comment = $MysqLi->real_escape_string($new_comment);
unset($_POST['submit_new_comment']);
//insert new comment into database.
$insert = $MysqLi->query("INSERT INTO ticket_comment (ticket_id,user_id,user_name,text) VALUES ('$ticket_id','$current_id','$current_username','$new_comment')");
if(!$insert){
echo"<p>".$MysqLi->error."</p>";
}
}
//include arrays for converting values returned
include("value_maps.PHP");
echo "<p id='assignedGroupId'></p>";
echo "<p>role id:".$assigned_to_role_id."</p>";
echo "<p>role name:".$assigned_to_role_name."</p>";
if(in_array($assigned_to_role_id,$_SESSION['user']->getRoles())){
echo "<p>you have this role.</p>";
} else {
echo "<p>you don't have this role.</p>";
}
print_r($_SESSION['user']->getRoles());
echo"
<form action='' method='post'>
<input type='hidden' name='ticket_id' value='$ticket_id'>
<input type='hidden' name='creator_user_id' value='$creator_user_id'>
<input type='hidden' name='creator_user_name' value='$creator_user_name'>
<input type='hidden' name='title' value='$title'>
<input type='hidden' name='assigned_to_role_id' value='$assigned_to_role_id'>
<input type='hidden' name='assigned_to_role_name' value='$assigned_to_role_name'>
<input type='hidden' name='assigned_to_user_id' value='$assigned_to_user_id'>
<input type='hidden' name='assigned_to_user_name' value='$assigned_to_user_name'>
<table border='0' align='center' cellpadding='5'>
<tr>
<th>Ticket ID</th>
<th>Title</th>
<th>Status</th>
<th>Priority</th>
<th>Assigned To Group</th>
<th>Assigned To User</th>
</tr>
<tr>
<td>$ticket_id</td>
<td>$title</td>";
if(in_array($assigned_to_role_id,$_SESSION['user']->getRoles()) or in_array(ROLE_ID_ADMIN,$_SESSION['user']->getRoles())){
echo "<td><select name='status'>";
$status_index = 0;
foreach($status_array as $status_choice){
if($status == $status_index){
echo "<option value='". $status_index."' selected>". $status_choice ."</option>";
} else {
echo "<option value='". $status_index."'>". $status_choice ."</option>";
}
$status_index++;
}
echo "</select></th>";
echo "<td><select name='priority'>";
$priority_index = 0;
foreach($priority_array as $priority_choice){
if($priority == $priority_index){
echo "<option value='". $priority_index."' selected>". $priority_choice ."</option>";
} else {
echo "<option value='". $priority_index."'>". $priority_choice ."</option>";
}
$priority_index++;
}
echo "</select></th>";
} else {
echo "<td>".$status_array[$status]."</th>";
echo "<td>".$priority_array[$priority]."</th>";
}
if(in_array(ROLE_ID_ADMIN,$_SESSION['user']->getRoles())){
echo "<td><select id='option_list_assigned_to_role_id' name='assigned_to_role' onchange='onChangeAssignedGroup()'>";
foreach($_SESSION['roles'] as $assigned_to_role_choice){
if($assigned_to_role_id == $assigned_to_role_choice->getId()){
echo "<option value='". $assigned_to_role_choice->getId()."' selected>". $assigned_to_role_choice->getName() ."</option>";
} else {
echo "<option value='". $assigned_to_role_choice->getId()."'>". $assigned_to_role_choice->getName() ."</option>";
}
}
echo "</select></td>";
} else {
echo "<td>$assigned_to_role_name</td>";
echo "<td>$assigned_to_user_name</td>";
}
echo"
</tr>
<tr>
<td colspan='5'></td>
<td><input type='submit' name='submit_update_ticket' value='Update Ticket Details' required></td>
</tr>
</table>
</form>
";
//get back ticket details
$results = $MysqLi->query("SELECT `id`,`ticket_id`,`user_id`,`user_name`,`text`,`create_date`,`modify_date` FROM `ticket_comment` WHERE `ticket_id` = ".$ticket_id." ORDER BY `create_date`");
//if insert was successful
if($results){
//header('location:registration_email_sent.PHP');
if ($results->num_rows > 0){
echo "
<table border='0' align='center' cellpadding='5'>
<tr>
<th>Username</th>
<th>Comment</th>
</tr>
";
while($row = $results->fetch_row()){
echo"
<tr>
<td>".$row[3].": </td>
<td>".$row[4]."</td>
</tr>";
}
} else {
echo "<p>No comments found. </p>";
}
}
$MysqLi->close();
echo"
<form method='post' action=''>
<input type='hidden' name='ticket_id' value='$ticket_id'>
<input type='hidden' name='creator_user_id' value='$creator_user_id'>
<input type='hidden' name='creator_user_name' value='$creator_user_name'>
<input type='hidden' name='status' value='$status'>
<input type='hidden' name='priority' value='$priority'>
<input type='hidden' name='title' value='$title'>
<input type='hidden' name='assigned_to_role_id' value='$assigned_to_role_id'>
<input type='hidden' name='assigned_to_role_name' value='$assigned_to_role_name'>
<input type='hidden' name='assigned_to_user_id' value='$assigned_to_user_id'>
<input type='hidden' name='assigned_to_user_name' value='$assigned_to_user_name'>
<table border='0' align='center' cellpadding='5'>
<tr>
<th>New Comment</th>
<th><input type='submit' name='submit_new_comment' value='Post New Comment'></th>
</tr>
<tr>
<td colspan='2'><textarea name='new_comment' rows='10' cols='30' placeholder='New Comment Here' required></textarea></td>
</tr>
</table>
</form>
";
}
?>
</body>
</html>
解决方法
在你的ajax请求中的数据对象中，你需要用逗号替换分号。
您还应该始终使用准备好的语句与数据库进行交互。
版权声明：本文内容由互联网用户自发贡献，该文观点与技术仅代表作者本人。本站仅提供信息存储空间服务，不拥有所有权，不承担相关法律责任。如发现本站有涉嫌侵权/违法违规的内容， 请发送邮件至 dio@foxmail.com 举报，一经查实，本站将立刻删除。
