add associated object's IDs as arrays for each record in collection

add associated object ids in activerecord.rb

# add associated object's IDs as arrays for each record in collection

Organization.joins(:users)
            .select("organizations.*, '#{User.joins(:organization).pluck(:id)}' as user_ids")
            .group('organizations.id')
            
# => { organizations: [{ id: 1, name: 'some name',... user_ids:[1,2,3] }] }