Hello guys.
In the method [1] ids_reader at ActiveRecord::Associations::CollectionAssociation I think we can do a performance improvement when we are dealing with has_many through associations.
class User < ActiveRecord::Base has_many :badge_items has_many :badges, through: :badge_items end
In the scenario above when we do something like User#badge_ids the query called is:
SELECT “badges”.id FROM “badges” inner join “badge_items” ON “badges”.“id” = “badge_items”.“badge_id” WHERE “badge_items”.“user_id” = 1
But would be great if we have this instead:
SELECT “badge_items”.“badge_id” FROM “badge_items” WHERE “badge_items”.“user_id” = 1
Is this in your plans already? Can I help with anything about it?
