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Added count_role_users() as a more efficient thing to do than get_role_users()

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moodler 2006-09-28 04:42:49 +00:00
parent 15fdf6199e
commit bac2f88ae8
1 changed files with 30 additions and 2 deletions
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32
lib/accesslib.php
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@ -2756,7 +2756,7 @@ function get_users_by_capability($context, $capability, $fields='', $sort='',
* @param bool parent if true, get list of users assigned in higher context too * @param bool parent if true, get list of users assigned in higher context too
* @return array() * @return array()
*/ */
function get_role_users($roleid, $context, $parent=false) { function get_role_users($roleid, $context, $parent=false, $fields='u.*') {
global $CFG; global $CFG;
if ($parent) { if ($parent) {
@ -2769,7 +2769,7 @@ function get_role_users($roleid, $context, $parent=false) {
$parentcontexts = ''; $parentcontexts = '';
} }
$SQL = "select u.* $SQL = "select $fields
from {$CFG->prefix}role_assignments r, from {$CFG->prefix}role_assignments r,
{$CFG->prefix}user u {$CFG->prefix}user u
where (r.contextid = $context->id $parentcontexts) where (r.contextid = $context->id $parentcontexts)
@ -2779,6 +2779,34 @@ function get_role_users($roleid, $context, $parent=false) {
return get_records_sql($SQL); return get_records_sql($SQL);
} }
/**
* Counts all the users assigned this role in this context or higher
* @param int roleid
* @param int contextid
* @param bool parent if true, get list of users assigned in higher context too
* @return array()
*/
function count_role_users($roleid, $context, $parent=false) {
global $CFG;
if ($parent) {
if ($contexts = get_parent_contexts($context)) {
$parentcontexts = 'r.contextid IN ('.implode(',', $contexts).')';
} else {
$parentcontexts = '';
}
} else {
$parentcontexts = '';
}
$SQL = "SELECT count(*)
FROM {$CFG->prefix}role_assignments r
WHERE (r.contextid = $context->id $parentcontexts)
AND r.roleid = $roleid";
return count_records_sql($SQL);
}
/** /**
* This function gets the list of courses that this user has a particular capability in * This function gets the list of courses that this user has a particular capability in
* This is not the most efficient way of doing this * This is not the most efficient way of doing this