Question

In activerecord, preferably without literal sql, I’m trying to get roughly this going:

Thing.where(:id => Link.select(:col1).where(subquery1), :id => Link.select(:col2).where(subquery2))

I need it to give me an AND between the subqueries, but instead the last subquery overrides the preceding ones.

Note: I’m selecting a different column from the Link table in each subquery

I’ve already tried this:

t = Thing.where(:id => Link.where(subquery1))
t.where(:id => Link.where(subquery2))

Also note the nature of the subqueries mean I can’t put my AND into a single subquery

Any way to do this in ActiveRecord without resorting to SQL?

I’m using Rails 3 and PostgreSQL

Thanks!

Answer 1

You are probably better off chaining two where conditions then combining them.

Thing.where(:id => Link.select(:col1).where(subquery1)).where(:id => Link.select(:col2).where(subquery2))

This will add the AND between the two IN queries.