Modify John's patch slightly - move some things around.

export_form.php

@@ -103,11 +103,11 @@ class mod_attendance_export_form extends moodleform {
 
         $ident = array();
         $checkedfields = array();
-        $adminsetfields = get_config('attendance', 'defaultexportfields');
-        if (in_array('id', explode(',', $adminsetfields))) {
-            $ident[] =& $mform->createElement('checkbox', 'id', '', get_string('studentid', 'attendance'));
-            $checkedfields['ident[id]'] = true;
-        }
+
+        $ident[] =& $mform->createElement('checkbox', 'id', '', get_string('studentid', 'attendance'));
+        $checkedfields['ident[id]'] = true;
+
+        $adminsetfields = get_config('attendance', 'customexportfields');
 
         $extrafields = get_extra_user_fields($modcontext);
         foreach ($extrafields as $field) {

lang/en/attendance.php

@@ -131,6 +131,8 @@ The sessions begin on the date of the base session and continue until the \'repe
 $string['createonesession'] = 'Create one session for the course';
 $string['csvdelimiter'] = 'CSV delimiter';
 $string['currentlyselectedusers'] = 'Currently selected users';
+$string['customexportfields'] = 'Export custom user profile fields';
+$string['customexportfields_help'] = 'Extra custom user profile fields to expose in the export report.';
 $string['date'] = 'Date';
 $string['days'] = 'Days';
 $string['defaultdisplaymode'] = 'Default display mode';
@@ -614,9 +616,4 @@ $string['warningthreshold'] = 'Warning threshold';
 $string['warningupdated'] = 'Updated warnings';
 $string['week'] = 'week(s)';
 $string['weeks'] = 'Weeks';
-$string['youcantdo'] = 'You can\'t do anything';
-
-$string['defaultexportsettings'] = 'Default export settings';
-$string['defaultexportsettings_help'] = 'These settings define the defaults for sessions export';
-$string['defaultexportfields'] = 'Default export fields';
-$string['defaultexportfields_help'] = 'Fields that can be used to identify student in export report (If you are seeing less options than expected, please check show user identity in User policies).';
+$string['youcantdo'] = 'You can\'t do anything';

settings.php

@@ -27,6 +27,7 @@ defined('MOODLE_INTERNAL') || die;
 if ($ADMIN->fulltree) {
     require_once(dirname(__FILE__).'/lib.php');
     require_once(dirname(__FILE__).'/locallib.php');
+    require_once($CFG->dirroot . '/user/profile/lib.php');
 
     $tabmenu = attendance_print_settings_tabs();
 
@@ -105,6 +106,18 @@ if ($ADMIN->fulltree) {
         get_string('enablewarnings', 'attendance'),
         get_string('enablewarnings_desc', 'attendance'), 0));
 
+    $fields = array();
+    $customfields = profile_get_custom_fields();
+    foreach ($customfields as $field) {
+        $fields[$field->shortname] = $field->name;
+    }
+
+    $settings->add(new admin_setting_configmultiselect('attendance/customexportfields',
+            new lang_string('customexportfields', 'attendance'),
+            new lang_string('customexportfields_help', 'attendance'),
+            array('id'), $fields)
+    );
+
     $name = new lang_string('mobilesettings', 'mod_attendance');
     $description = new lang_string('mobilesettings_help', 'mod_attendance');
     $settings->add(new admin_setting_heading('mobilesettings', $name, $description));
@@ -191,23 +204,4 @@ if ($ADMIN->fulltree) {
     $settings->add(new admin_setting_configtextarea('attendance/emailcontent',
         get_string('emailcontent', 'attendance'), get_string('emailcontent_help', 'attendance'),
         get_string('emailcontent_default', 'attendance'), PARAM_RAW));
-
-    $name = new lang_string('defaultexportsettings', 'mod_attendance');
-    $description = new lang_string('defaultexportsettings_help', 'mod_attendance');
-    $settings->add(new admin_setting_heading('defaultexportsettings', $name, $description));
-
-    $fields = array('id' => get_string('studentid', 'attendance'));
-
-    require_once($CFG->dirroot . '/user/profile/lib.php');
-    $customfields = profile_get_custom_fields();
-    foreach ($customfields as $field) {
-        $fields[$field->shortname] = $field->name;
-    }
-
-    $settings->add(new admin_setting_configmultiselect('attendance/defaultexportfields',
-        new lang_string('defaultexportfields', 'attendance'),
-        new lang_string('defaultexportfields_help', 'attendance'),
-        array('id'), $fields)
-    );
-
 }