如何在propel中使用子查询获取行计数（从其他表中）？

Question

我想要做这样的事情：

SELECT a.*, (SELECT COUNT(*) FROM b where b.col1 = a.col2) as count FROM a 

使用推动标准与否这可能吗？

Answer 1

$c = new Criteria(); 
$c->addSelectColumn(aPeer::TABLE_NAME.'.*'); 
$c->addAsColumn('count', '(SELECT COUNT(*) FROM b WHERE b.col1 = a.col2)'); 
aPeer::doSelect($c);