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MDL-53309 grades: Only update when required

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This commit is contained in:
David Monllao 2016-03-31 16:28:27 +08:00
parent b611ade3ab
commit 1076e02f29
2 changed files with 109 additions and 31 deletions
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136
lib/grade/grade_category.php
View File

@ -813,34 +813,108 @@ class grade_category extends grade_object {
private function set_usedinaggregation($userid, $usedweights, $novalue, $dropped, $extracredit) {
global $DB;
// Reset aggregation to unknown and 0 for all grade items for this user and category.
// We want to know all current user grades so we can decide whether they need to be updated or they already contain the
// expected value.
$sql = "SELECT gi.id, gg.aggregationstatus, gg.aggregationweight FROM {grade_grades} gg
JOIN {grade_items} gi ON (gg.itemid = gi.id)
WHERE gg.userid = :userid";
$params = array('categoryid' => $this->id, 'userid' => $userid);
switch ($DB->get_dbfamily()) {
case 'mysql':
// Optimize the query for MySQL by using a join rather than a sub-query.
$sql = "UPDATE {grade_grades} g
JOIN {grade_items} gi ON (g.itemid = gi.id)
SET g.aggregationstatus = 'unknown',
g.aggregationweight = 0
WHERE g.userid = :userid
AND gi.categoryid = :categoryid";
break;
default:
$itemssql = "SELECT id
FROM {grade_items}
WHERE categoryid = :categoryid";
// These are all grade_item ids which grade_grades will NOT end up being 'unknown' (because they are not unknown or
// because we will update them to something different that 'unknown').
$giids = array_keys($usedweights + $novalue + $dropped + $extracredit);
$sql = "UPDATE {grade_grades}
SET aggregationstatus = 'unknown',
aggregationweight = 0
WHERE userid = :userid
AND itemid IN ($itemssql)";
if ($giids) {
// We include grade items that might not be in categoryid.
list($itemsql, $itemlist) = $DB->get_in_or_equal($giids, SQL_PARAMS_NAMED, 'gg');
$sql .= ' AND (gi.categoryid = :categoryid OR gi.id ' . $itemsql . ')';
$params = $params + $itemlist;
} else {
$sql .= ' AND gi.categoryid = :categoryid';
}
$currentgrades = $DB->get_recordset_sql($sql, $params);
// We will store here the grade_item ids that need to be updated on db.
$toupdate = array();
if ($currentgrades->valid()) {
// Iterate through the user grades to see if we really need to update any of them.
foreach ($currentgrades as $currentgrade) {
// Unset $usedweights that we do not need to update.
if (!empty($usedweights) && isset($usedweights[$currentgrade->id]) && $currentgrade->aggregationstatus === 'used') {
// We discard the ones that already have the contribution specified in $usedweights and are marked as 'used'.
if (grade_floats_equal($currentgrade->aggregationweight, $usedweights[$currentgrade->id])) {
unset($usedweights[$currentgrade->id]);
}
// Used weights can be present in multiple set_usedinaggregation arguments.
if (!isset($novalue[$currentgrade->id]) && !isset($dropped[$currentgrade->id]) &&
!isset($extracredit[$currentgrade->id])) {
continue;
}
}
// No value grades.
if (!empty($novalue) && isset($novalue[$currentgrade->id])) {
if ($currentgrade->aggregationstatus !== 'novalue' ||
grade_floats_different($currentgrade->aggregationweight, 0)) {
$toupdate['novalue'][] = $currentgrade->id;
}
continue;
}
// Dropped grades.
if (!empty($dropped) && isset($dropped[$currentgrade->id])) {
if ($currentgrade->aggregationstatus !== 'dropped' ||
grade_floats_different($currentgrade->aggregationweight, 0)) {
$toupdate['dropped'][] = $currentgrade->id;
}
continue;
}
// Extra credit grades.
if (!empty($extracredit) && isset($extracredit[$currentgrade->id])) {
// If this grade item is already marked as 'extra' and it already has the provided $usedweights value would be
// silly to update to 'used' to later update to 'extra'.
if (!empty($usedweights) && isset($usedweights[$currentgrade->id]) &&
grade_floats_equal($currentgrade->aggregationweight, $usedweights[$currentgrade->id])) {
unset($usedweights[$currentgrade->id]);
}
// Update the item to extra if it is not already marked as extra in the database or if the item's
// aggregationweight will be updated when going through $usedweights items.
if ($currentgrade->aggregationstatus !== 'extra' ||
(!empty($usedweights) && isset($usedweights[$currentgrade->id]))) {
$toupdate['extracredit'][] = $currentgrade->id;
}
continue;
}
// If is not in any of the above groups it should be set to 'unknown', checking that the item is not already
// unknown, if it is we don't need to update it.
if ($currentgrade->aggregationstatus !== 'unknown' || grade_floats_different($currentgrade->aggregationweight, 0)) {
$toupdate['unknown'][] = $currentgrade->id;
}
}
$currentgrades->close();
}
$DB->execute($sql, $params);
// Update items to 'unknown' status.
if (!empty($toupdate['unknown'])) {
list($itemsql, $itemlist) = $DB->get_in_or_equal($toupdate['unknown'], SQL_PARAMS_NAMED, 'g');
// Included with weights.
$itemlist['userid'] = $userid;
$sql = "UPDATE {grade_grades}
SET aggregationstatus = 'unknown',
aggregationweight = 0
WHERE itemid $itemsql AND userid = :userid";
$DB->execute($sql, $itemlist);
}
// Update items to 'used' status and setting the proper weight.
if (!empty($usedweights)) {
// The usedweights items are updated individually to record the weights.
foreach ($usedweights as $gradeitemid => $contribution) {
@ -854,9 +928,9 @@ class grade_category extends grade_object {
}
}
// No value.
if (!empty($novalue)) {
list($itemsql, $itemlist) = $DB->get_in_or_equal(array_keys($novalue), SQL_PARAMS_NAMED, 'g');
// Update items to 'novalue' status.
if (!empty($toupdate['novalue'])) {
list($itemsql, $itemlist) = $DB->get_in_or_equal($toupdate['novalue'], SQL_PARAMS_NAMED, 'g');
$itemlist['userid'] = $userid;
@ -868,9 +942,9 @@ class grade_category extends grade_object {
$DB->execute($sql, $itemlist);
}
// Dropped.
if (!empty($dropped)) {
list($itemsql, $itemlist) = $DB->get_in_or_equal(array_keys($dropped), SQL_PARAMS_NAMED, 'g');
// Update items to 'dropped' status.
if (!empty($toupdate['dropped'])) {
list($itemsql, $itemlist) = $DB->get_in_or_equal($toupdate['dropped'], SQL_PARAMS_NAMED, 'g');
$itemlist['userid'] = $userid;
@ -882,9 +956,9 @@ class grade_category extends grade_object {
$DB->execute($sql, $itemlist);
}
// Extra credit.
if (!empty($extracredit)) {
list($itemsql, $itemlist) = $DB->get_in_or_equal(array_keys($extracredit), SQL_PARAMS_NAMED, 'g');
// Update items to 'extracredit' status.
if (!empty($toupdate['extracredit'])) {
list($itemsql, $itemlist) = $DB->get_in_or_equal($toupdate['extracredit'], SQL_PARAMS_NAMED, 'g');
$itemlist['userid'] = $userid;

4
lib/grade/tests/grade_category_test.php
View File

@ -282,6 +282,10 @@ class core_grade_category_testcase extends grade_base_testcase {
$DB->set_field('grade_grades', 'finalgrade', null, array('itemid'=>$childcat1itemid));
$parentcat->generate_grades();
$this->assertFalse($DB->record_exists_select(
'grade_grades',
"aggregationstatus='dropped' and itemid in (?,?)",
array($childcat1itemid, $childcat2itemid)));
$this->assertTrue($DB->record_exists_select(
'grade_grades',
"aggregationstatus='novalue' and itemid = ?",