ruby on rails - ActiveRecord query using 'includes' sometimes applies the default_scope, and sometimes doesn't -

i trying perform activerecord query on user model uses includes eager-load users' roles , locations. (a user has many roles , has many locations) location model has default scope. is:

where(:status => [0, 2])

when perform simple query includes, default scope on location model applied. example, query:

user.includes(:roles, :locations)

will contain following in sql output:

select "locations".*, "t0"."user_id" ar_association_key_name "locations" inner join "locations_users" "t0" on "locations"."id" = "t0"."location_id" "locations"."status" in (0, 2)

however, more complex query, such as:

user.includes(:roles, :locations).where(roles: {id: 13})

does not apply location default scope. locations status of 1 being included in users' returned locations.

i notice first query performed multiple select statements, whereas 2nd query performed 1 select statement many joins. how can make default_scope applied in cases?

i using rails 3.2.22.