In pure SQL it would be:

select * from
page where page_part_id in (
select page_part_id from
page_parts where name = "body" and content is null
)

Or you could do a join

select * from page p, page_part p1 where
p.page_part_id = p1.page_part_id
and
p1.name="body"
p1.content is null


I'm not well versed enough in Rails to know how to do this, ha! Isn't
there a "sql" option in ActiveRecord where you can just push in db-sql
and not worry about Rails doing the joins?
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