private function fetchText()
{
$textId = $this->getTextId();
// If we kept data for lazy extraction, use it now...
if ($this->mTextRow !== null) {
$row = $this->mTextRow;
$this->mTextRow = null;
} else {
$row = null;
}
// Callers doing updates will pass in READ_LATEST as usual. Since the text/blob tables
// do not normally get rows changed around, set READ_LATEST_IMMUTABLE in those cases.
$flags = $this->mQueryFlags;
$flags |= DBAccessObjectUtils::hasFlags($flags, self::READ_LATEST) ? self::READ_LATEST_IMMUTABLE : 0;
list($index, $options, $fallbackIndex, $fallbackOptions) = DBAccessObjectUtils::getDBOptions($flags);
if (!$row) {
// Text data is immutable; check replica DBs first.
$row = wfGetDB($index)->selectRow('text', ['old_text', 'old_flags'], ['old_id' => $textId], __METHOD__, $options);
}
// Fallback to DB_MASTER in some cases if the row was not found
if (!$row && $fallbackIndex !== null) {
// Use FOR UPDATE if it was used to fetch this revision. This avoids missing the row
// due to REPEATABLE-READ. Also fallback to the master if READ_LATEST is provided.
$row = wfGetDB($fallbackIndex)->selectRow('text', ['old_text', 'old_flags'], ['old_id' => $textId], __METHOD__, $fallbackOptions);
}
if (!$row) {
wfDebugLog('Revision', "No text row with ID '{$textId}' (revision {$this->getId()}).");
}
$text = self::getRevisionText($row);
if ($row && $text === false) {
wfDebugLog('Revision', "No blob for text row '{$textId}' (revision {$this->getId()}).");
}
return is_string($text) ? $text : false;
}
/**
* Load user table data, given mId has already been set.
* @param integer $flags User::READ_* constant bitfield
* @return bool False if the ID does not exist, true otherwise
*/
public function loadFromId($flags = self::READ_NORMAL)
{
if ($this->mId == 0) {
$this->loadDefaults();
return false;
}
// Try cache (unless this needs data from the master DB).
// NOTE: if this thread called saveSettings(), the cache was cleared.
$latest = DBAccessObjectUtils::hasFlags($flags, self::READ_LATEST);
if ($latest || !$this->loadFromCache()) {
wfDebug("User: cache miss for user {$this->mId}\n");
// Load from DB (make sure this thread sees its own changes)
if (wfGetLB()->hasOrMadeRecentMasterChanges()) {
$flags |= self::READ_LATEST;
}
if (!$this->loadFromDatabase($flags)) {
// Can't load from ID, user is anonymous
return false;
}
$this->saveToCache();
}
$this->mLoadedItems = true;
$this->queryFlagsUsed = $flags;
return true;
}
/**
* Load user table data, given mId has already been set.
* @param integer $flags User::READ_* constant bitfield
* @return bool False if the ID does not exist, true otherwise
*/
public function loadFromId($flags = self::READ_NORMAL)
{
if ($this->mId == 0) {
// Anonymous users are not in the database (don't need cache)
$this->loadDefaults();
return false;
}
// Try cache (unless this needs data from the master DB).
// NOTE: if this thread called saveSettings(), the cache was cleared.
$latest = DBAccessObjectUtils::hasFlags($flags, self::READ_LATEST);
if ($latest) {
if (!$this->loadFromDatabase($flags)) {
// Can't load from ID
return false;
}
} else {
$this->loadFromCache();
}
$this->mLoadedItems = true;
$this->queryFlagsUsed = $flags;
return true;
}
