I'm currently using ar_lazy_preload Gem, for lazy preload, but sometimes I only need some attributes of those relations preloaded, I was wondering if there is a way to retrieve only some columns using select, maybe using Arel? (I'm not very familiar with it)
An example: User - Person: 1 to 1 relation
User.lazy_preload(:person).all , but from person relation only need date of birth
the closest issue i found was this it does not work with ar_lazy_preload
I expect to lazy preload but with a query that uses a select to retrieve only what i need
users = User.lazy_preload(person: [:date_of_birth]).all making 1 queries
Select * from users
users.first.person.date_of_birth makes another query
Select people.date_of_birth from people where people.user_id in ($ids from first query)