/**
* @inheritdoc
*/
protected function getMigrationHistory($limit)
{
if ($this->db->schema->getTableSchema($this->migrationTable, true) === null) {
$this->createMigrationHistoryTable();
}
$query = new Query();
$rows = $query->select(['version', 'apply_time'])->from($this->migrationTable)->orderBy('apply_time DESC, version DESC')->limit($limit)->createCommand($this->db)->queryAll();
$history = ArrayHelper::map($rows, 'version', 'apply_time');
unset($history[self::BASE_MIGRATION]);
return $history;
}
/**
* Loads the messages from database.
* You may override this method to customize the message storage in the database.
* @param string $category the message category.
* @param string $language the target language.
* @return array the messages loaded from database.
*/
protected function loadMessagesFromDb($category, $language)
{
$mainQuery = new Query();
$mainQuery->select(['t1.message message', 't2.translation translation'])->from(["{$this->sourceMessageTable} t1", "{$this->messageTable} t2"])->where('t1.id = t2.id AND t1.category = :category AND t2.language = :language')->params([':category' => $category, ':language' => $language]);
$fallbackLanguage = substr($language, 0, 2);
if ($fallbackLanguage != $language) {
$fallbackQuery = new Query();
$fallbackQuery->select(['t1.message message', 't2.translation translation'])->from(["{$this->sourceMessageTable} t1", "{$this->messageTable} t2"])->where('t1.id = t2.id AND t1.category = :category AND t2.language = :fallbackLanguage')->andWhere("t2.id NOT IN (SELECT id FROM {$this->messageTable} WHERE language = :language)")->params([':category' => $category, ':language' => $language, ':fallbackLanguage' => $fallbackLanguage]);
$mainQuery->union($fallbackQuery, true);
}
$messages = $mainQuery->createCommand($this->db)->queryAll();
return ArrayHelper::map($messages, 'message', 'translation');
}
