This project forked from hypemarks/vesta-activerecord_lateral
Let's imagine
class Discussion < ActiveRecord::Base
belongs_to :topic
end
class Topic < ActiveRecord::Base
has_many :discussions
has_many :last_discussions, -> { order(created_at: :desc).limit(3) }, class_name: Discussions
endTopic.all.includes(:last_discussions) works!
SELECT "discussions".* FROM (SELECT unnest(ARRAY[2 ,1]) id) ids, LATERAL (SELECT "discussions".* FROM "discussions" WHERE "discussions"."topic_id" = ids.id ORDER BY "discussions"."created_at" DESC LIMIT 3) discussions
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