Bu şemaya sahibim: Post belongs_to Kategori ve Kategori has_many Mesaj. Posta ve Kategori benim PostsController olarak mücevher globalize3Rails 3 çeviriler globalize3 dahil activerecord
class Post < ActiveRecord::Base
belongs_to :category
translates :title, :excerpt, :desC# globalize3
end
class Category < ActiveRecord::Base
has_many :posts
translates :name # globalize3
end
ile globalize I Bu kod satırı ile tüm mesajları almak:
def index
@posts = Post.includes([:translations, {:category => :translations}])
end
Sorun kategori çevirileri n + 1 sorgu sorunu olması tablo:
Post Load (0.3ms) SELECT "posts".* FROM "posts"
Post::Translation Load (0.3ms) SELECT "post_translations".* FROM "post_translations" WHERE ("post_translations".post_id IN (2,3,4))
# START n+1 query block
Category Load (1.9ms) SELECT "categories".* FROM "categories" WHERE ("categories"."id" IN (9,12,11))
Category::Translation Load (0.4ms) SELECT "category_translations".* FROM "category_translations" WHERE ("category_translations".category_id = 9) AND ("category_translations"."locale" IN ('it'))
CACHE (0.0ms) SELECT "category_translations".* FROM "category_translations" WHERE ("category_translations".category_id = 9) AND ("category_translations"."locale" IN ('it'))
Category::Translation Load (0.2ms) SELECT "category_translations".* FROM "category_translations" WHERE ("category_translations".category_id = 12) AND ("category_translations"."locale" IN ('it'))
CACHE (0.0ms) SELECT "category_translations".* FROM "category_translations" WHERE ("category_translations".category_id = 12) AND ("category_translations"."locale" IN ('it'))
Category::Translation Load (0.2ms) SELECT "category_translations".* FROM "category_translations" WHERE ("category_translations".category_id = 11) AND ("category_translations"."locale" IN ('it'))
CACHE (0.0ms) SELECT "category_translations".* FROM "category_translations" WHERE ("category_translations".category_id = 11) AND ("category_translations"."locale" IN ('it'))
# END n+1 query block
Category::Translation Load (0.5ms) SELECT "category_translations".* FROM "category_translations" WHERE ("category_translations".category_id IN (9,12,11))
Bu n + 1 sorgu problemini nasıl çözebilirim?