Tp3.2 mysql where条件做复合查询

$where1 = array(
'uid' => array('eq', $id),
'type' => array('eq', 1),
'trade_type' => array('eq', 1),
'status' => array('in', array(2,3,4))
);
$where = array(
'_complex' => $where1, // 复合查询
'_logic' => 'or', // 关系为or
'_string' => 'b_uid='.$id.' AND type=2 AND trade_type=1 AND status in (2,3,4)',
);