/**
* 表统计
*
* @param array $filter
* @return int
*/
public function count(array $filter = array())
{
$sql = "SELECT COUNT(*) FROM " . $this->db->table($this->tableName);
if (!empty($filter)) {
$sql .= " WHERE " . $this->parseFilter($filter);
}
return intval($this->db->getOne($sql));
}