使用 DBIx::Class 执行集合操作的最佳方式是什么?我看到一种解决方案是根据我的查询创建一个结果源,但我的条件将由用户定义,我不知道最佳答案是否是动态创建结果源。
基本上我需要将这种类型的查询转换为 DBIC where code
,attr_name
并且value
由用户定义:
SELECT pid FROM product WHERE code = 48
INTERSECT
(
( SELECT pid FROM attr WHERE attr_name = 'color' AND value = 'blue'
INTERSECT
SELECT pid FROM attr WHERE attr_name = 'size' AND value = 'big'
)
UNION
( SELECT pid FROM attr WHERE attr_name = 'color' AND value = 'green'
INTERSECT
SELECT pid FROM attr WHERE attr_name = 'size' AND value = 'small'
)
)