我目前正在使用 jQuery Mobile 和 MVC 框架开发移动应用程序。它用作任务/作业管理器，允许用户输入班级信息（姓名、讲师、描述等）和每个班级的作业信息（标题、注释、到期日期等）
我已经使用会话变量创建了一个登录页面，并且可以成功登录。登录后，我有一个默认操作 =“list_assignments”，它采用所有类名并将它们转换为列表视图的分隔符，其中包含每个类下的分配。
我的问题是，登录时我会看到所有用户的每个分配。
我在 MySQL 中有 3 个表，
- 作业（assign_id[PKey and AutoInc]、assign_title、note、dueDate、user_id、class_id）
- 类（class_id[Pkey & AI]、class_name、class_instructor、class_description、user_id）
- 用户（user_id[Pkey & AI]、用户名、密码）
assignment_tracker/index.php（控制器）
if ($action == 'list_assignments') {
// Get the current user ID
@ $user_id = $_SESSION['user_id'];
if (!isset($user_id)) {
$user_id = 1;
}
// Get the current class ID
@ $class_id = $_GET['class_id'];
if (!isset($class_id)) {
$class_id = 1;
}
// Get assignment and class data
$class_name = get_class_name($class_id);
$classes = get_classes();
// needs to be looped for each class within assignment_list.php
$assignments = get_assignments_by_class($class_id);
// Display the assignment list, or build "the view"
include('view/assignment_list.php');
}
assignment_tracker/view/assignment_list.php
<?php include ('header.php'); ?>
<?php print $_SESSION['user_id']; ?>
<div data-role="content" id="assignment_list">
<!-- create 2 foreach loops, 1 for classes to be listed and organized by id in list dividers and another for listing individual assignments within each class -->
<ul data-role="listview">
<!--classes loop-->
<?php foreach ($classes as $class) : ?>
<li data-role="list-divider"><?php echo $class['class_name']; ?></li>
<?php $assignments=get_assignments_by_class($class['class_id']); ?>
<?php foreach ($assignments as $assignment) : ?><!--assignments loop-->
<?php print'<li><a href="index.php?action=show_assign_details&assign_id='.$assignment['assign_id'].'&class_id='.$assignment['class_id'].'">'.$assignment['assign_title'].'</a></li>';?>
<?php endforeach; ?> <!--/assignments loop-->
<?php endforeach; ?> <!--/classes loop-->
</ul>
</div><!--/data-role="content"-->
<?php include 'footer.php'; ?>
assignment_tracker/model/class_db.php
<?php
function get_classes() {
global $db;
$query = 'SELECT * FROM classes
ORDER BY class_id';
$result = $db->query($query);
return $result;
}
function get_class_name($class_id) {
global $db;
$query = "SELECT * FROM classes
WHERE class_id = $class_id";
$class = $db->query($query);
$class = $class->fetch();
$class_name = $class['class_name'];
return $class_name;
}
assignment_tracker/model/assignment_db.php
<?php
function get_assignments() {
global $db;
$query = 'SELECT * FROM assignments
ORDER BY assign_ID';
$assignments = $db->query($query);
return $assignments;
}
function get_assignments_by_class($class_id) {
global $db;
$query = "SELECT * FROM assignments
WHERE assignments.class_id = '".$class_id."'
ORDER BY assign_id";
$assignments = $db->query($query);
return $assignments;
}
我尝试创建一个查询来根据用户的 id 查找分配，但是当我在 foreach 循环中实现解决方案时，我得到了 foreach 错误的无效参数，这意味着我的输入之一不是数组。我已经为此困扰了很多小时，所以我认为是时候使用我的资源并寻求帮助了。
如果您需要更多信息，请告诉我，我感谢所有提前提供帮助的人。
更新：
大家好，
我想出了如何通过将用户 ID 硬编码到我的查询中来获得结果。起初我认为由于某种原因它没有返回数组，但是在 phpMyAdmin 中进行测试后，当 user_id 被硬编码时，我的查询工作正常。
我在 class_db.php 中创建了一个新函数，只返回 user_id 匹配的类。我正在尝试使用$_SESSION['user_id']我在登录时在控制器中设置的变量。
function get_classes_by_user($user_id) {
global $db;
$query = 'SELECT * FROM classes
WHERE user_id = 1
ORDER BY class_id';
$result = $db->query($query);
return $result;
}
索引.php
if ($action == 'list_assignments') {
// Get the current class ID
@ $class_id = $_GET['class_id'];
if (!isset($class_id)) {
$class_id = 1;
}
// Get the current user ID
@ $user_id = $_SESSION['user_id'];
if (!isset($user_id)) {
$user_id = 1;
}
// Get assignment and class data
$class_name = get_class_name($class_id);
$classes = get_classes();
//new function being called with resultant array stored in $userclasses
$userclasses = get_classes_by_user($user_id);
// needs to be looped for each class within assignment_list.php
$assignments = get_assignments_by_class($class_id);
// Display the assignment list, or build "the view"
include('view/assignment_list.php');
}
assignment_list.php
<?php include ('header.php'); ?>
<?php print $_SESSION['user_id']; ?>
<div data-role="content" id="assignment_list">
<!-- create 2 foreach loops, 1 for classes to be listed and organized by id in list dividers and another for listing individual assignments within each class -->
<ul data-role="listview">
<!--classes loop-->
<?php foreach ($userclasses as $class) : ?>
<li data-role="list-divider"><?php echo $class['class_name']; ?></li>
<?php $assignments=get_assignments_by_class($class['class_id']); ?>
<?php foreach ($assignments as $assignment) : ?><!--assignments loop-->
<?php print'<li><a href="index.php?action=show_assign_details&assign_id='.$assignment['assign_id'].'&class_id='.$assignment['class_id'].'">'.$assignment['assign_title'].'</a></li>';?>
<?php endforeach; ?> <!--/assignments loop-->
<?php endforeach; ?> <!--/classes loop-->
</ul>
</div><!--/data-role="content"-->
<?php include 'footer.php'; ?>
我将上面 foreach 循环中的 $classes 更改为 $userclasses 以匹配新函数。
有人有想法么？我知道我非常接近解决这个问题！再次感谢您的帮助！