rails方式编写复杂的查询
我有这个问题：
SELECT f.id, Concat(f.name, ' ', REPLACE(f.parent_names, ',', ' ?')) AS FullName, u.name AS Unit, u.id AS UnitId, u.position AS UnitPosition, city.name AS City, hus.mobile1 AS HusMobile, wife.mobile1 AS WifeMobile, hus.first_name AS Spouse1, wife.first_name AS Spouse2, f.phone AS HomePhone, f.email AS Email, Date_format(f.contact_initiation_date, '%d/%m/%Y') AS InitDate, f.contact_initiation_date AS sql_date, Date_format(f.status_change_date, '%d/%m/%Y') AS StatususChangeDate, stts.name AS 'Status', (SELECT Group_concat(' ', t.name, '' ORDER BY t.position DESC ) FROM taggings tgs JOIN tags t ON tgs.tag_id = t.id WHERE tgs.taggable_type = 'family' AND tgs.taggable_id = (SELECT DISTINCT taggable_id FROM taggings WHERE tag_id IN( 76, 72, 74 ) AND taggable_id = f.id)) AS HandlingStatus, Date_format(f.reconnection_date, '%d/%m/%Y') AS ReconnectionDate, f.reconnection_date AS reconnection_sql_date, Date_format(cmt.created_at, '%d/%m/%Y') AS CommentDate, cmt.comment AS LastComment, usr.name AS Comentator, Format(e.income_total, 0) AS Income, Format(e.expense_total, 0) AS Expense, Format(e.debts_total, 0) AS Debts FROM families f JOIN categories stts ON f.family_status_cat_id = stts.id JOIN units u ON f.unit_id = u.id JOIN categories city ON f.main_city_cat_id = city.id LEFT JOIN comments cmt ON f.last_comment_id = cmt.id LEFT JOIN contacts hus ON hus.id = f.husband_id LEFT JOIN contacts wife ON wife.id = f.wife_id LEFT JOIN users usr ON usr.id = cmt.user_id LEFT JOIN escort_requests e ON e.family_id = f.id WHERE ( 1 = 0 OR ( u.is_busy = 0 AND f.family_status_cat_id = 1421 ) OR ( u.is_busy = 1 AND f.family_status_cat_id = 1421 ) OR ( f.family_status_cat_id = 1423 ) OR ( f.family_status_cat_id = 1424 ) ) HAVING ( 1 = 1 AND handlingstatus IS NOT NULL AND fullname LIKE '%%' ) ORDER BY fullname LIMIT 0, 100 我如何在Rails中编写它？ 现在我用字符串构建一个数组，但是有没有更好的方法呢？ 如果没有更好的方法，那就提一下吧。
行中的值：WHERE tag_id IN（76,72,74）是动态创建的。
我一直在尝试将一些复杂的SQL与Rails集成，并没有找到比直接运行SQL更好的方法。 任何偏离非常简单的查询的东西都很难在activerecord中编码（和理解）。