SearchProp

$news = $this->backend->getObject('News');
$so1 =& new Ethna_AppSearchObject($now,OBJECT_CONDITION_LT);
$result = $news->searchProp
(
array('news_id','title'),
array('open_date'=>$so1,'is_open'=>'1','is_delete'=>'0'), //Where句
array('open_date'=>1), // ORDER BY open_date DESC
0,2); //Limit 0,2

OBJECT_CONDITION_EQ:"="
OBJECT_CONDITION_NE:"!="
OBJECT_CONDITION_LIKE:"LIKE"
OBJECT_CONDITION_GT:">"
OBJECT_CONDITION_LT:"<"
OBJECT_CONDITION_GE:">="
OBJECT_CONDITION_LE:"<="