Fixes database errors from faulty Journal to Online Assignment upgrade code

from 1.4 to 1.5.1 Script can be run at any time. (SE)
2005-07-21 10:28:30 +00:00
parent 00b3edfdfb
commit 8bd9d5fe2e
1 changed files with 148 additions and 0 deletions
@@ -0,0 +1,148 @@
+<?php
+
+if (!isset($CFG)) {
+
+    require('../config.php');
+
+    require_login();
+
+    if (!isadmin()) {
+        error('You must be an admin to use this script');
+        exit;
+    }
+    
+    print_header_simple('Online Assignment Cleanup','Online Assignment Cleanup', 'Admin');
+
+    online_assignment_cleanup(true);
+
+    print_footer();
+
+}
+
+
+
+function online_assignment_cleanup($output=false) {
+    global $CFG;
+
+    if ($output) {
+        print_heading('Online Assignment Cleanup');
+        echo '<center>';
+    }
+
+    // get the module id for assignments from db
+    $arecord = get_record('modules', 'name', 'assignment');
+    $aid = $arecord->id;
+
+
+    /// get a list of all courses on this site
+    $courses = get_courses();
+
+    /// cycle through each course
+    foreach ($courses as $course) {
+
+        $fullname = empty($course->fullname) ? 'Course: '.$course->id : $course->fullname;
+        if ($output) print_heading($fullname);
+
+        /// retrieve a list of sections beyond what is currently being shown
+        $sql = 'SELECT * FROM '.$CFG->prefix.'course_sections WHERE `course`='.$course->id.' AND `section`>'.$course->numsections.' ORDER BY `section` ASC';
+        if (!($xsections = get_records_sql($sql))) {
+            if ($output) echo 'No extra sections<br />';
+            continue;
+        }
+
+        /// cycle through each of the xtra sections
+        foreach ($xsections as $xsection) {
+
+            if ($output) echo 'Checking Section: '.$xsection->section.'<br />';
+
+            /// grab any module instances from the sequence field
+            if (!empty($xsection->sequence)) {
+                $instances = explode(',', $xsection->sequence);
+
+                /// cycle through the instances
+                foreach ($instances as $instance) {
+                    /// is this an instance of an online assignment
+                    $sql = "SELECT a.id 
+                        FROM  {$CFG->prefix}course_modules cm,
+                    {$CFG->prefix}assignment a
+                    WHERE cm.id = '$instance' AND
+                        cm.module = '$aid' AND
+                        cm.instance = a.id AND
+                        a.assignmenttype = 'online'";
+
+
+                    /// if record exists then we need to move instance to it's correct section
+                    if (record_exists_sql($sql)) {
+
+                        /// check the new section id
+                        /// the journal update erroneously stored it in course_sections->section
+                        $newsection = $xsection->section;
+                        /// double check the new section
+                        if ($newsection > $course->numsections) {
+                            /// get the record for section 0 for this course
+                            if (!($zerosection = get_record('course_sections', 'course', $course->id, 'section', '0'))) {
+                                continue;
+                            }
+                            $newsection = $zerosection->id;
+                        }
+
+                        /// grab the section record
+                        if (!($section = get_record('course_sections', 'id', $newsection))) {
+                            if ($output) echo 'Serious error: Cannot retrieve section: '.$newsection.' for course: '.$course->fullname.'<br />';
+                            continue;
+                        }
+
+                        /// explode the sequence
+                        if  (($sequence = explode(',', $section->sequence)) === false) {
+                            $sequence = array();
+                        }
+
+                        /// add instance to correct section
+                        array_push($sequence, $instance);
+
+                        /// implode the sequence
+                        $section->sequence = implode(',', $sequence);
+
+                        set_field('course_sections', 'sequence', $section->sequence, 'id', $section->id);
+
+                        /// now we need to remove the instance from the old sequence
+
+                        /// grab the old section record
+                        if (!($section = get_record('course_sections', 'id', $xsection->id))) {
+                            if ($output) echo 'Serious error: Cannot retrieve old section: '.$xsection->id.' for course: '.$course->fullname.'<br />';
+                            continue;
+                        }
+
+                        /// explode the sequence
+                        if  (($sequence = explode(',', $section->sequence)) === false) {
+                            $sequence = array();
+                        }
+
+                        /// remove the old value from the array
+                        $key = array_search($instance, $sequence);
+                        unset($sequence[$key]);
+
+                        /// implode the sequence
+                        $section->sequence = implode(',', $sequence);
+
+                        set_field('course_sections', 'sequence', $section->sequence, 'id', $section->id);
+
+                        
+                        if ($output) echo 'Online Assignment (instance '.$instance.') moved from section '.$section->id.': to section '.$newsection.'<br />';
+
+                    }
+                }
+            }
+
+            /// if the summary and sequence are empty then remove this section
+            if (empty($xsection->summary) and empty($xsection->sequence)) {
+                delete_records('course_sections', 'id', $xsection->id);
+                if ($output) echo 'Deleting empty section '.$xsection->section.'<br />';
+            }
+        }
+    }
+
+    echo '</center>';
+}
+
+?>