/**
* Returns objects count in collection
*
* @return bool|null
*/
public function count()
{
$this->select('count(*)');
$result = null;
$sql = $this->compile();
$tbl = $this->getStatement('table');
$cache_key = OrmCache::genKey($sql, $this->values_accum);
if (($result_cached = OrmCache::getCachedQuery($cache_key)) !== false && $this->use_cache) {
return $result_cached;
}
if (($result_cached = OrmCache::getFromInternalCache($cache_key)) !== false) {
return $result_cached;
}
$result = Db::getCell($this->compile(), $this->values_accum);
if ($this->use_cache) {
OrmCache::cacheQuery($cache_key, $tbl['sql'], $result);
return $result;
}
OrmCache::storeInternal($cache_key, $tbl['sql'], $result);
return $result;
}