레일즈 3 번역을 포함합니다. globalize3 activerecord

Question

나는이 스키마를 가지고 있습니다 : 게시 belongs_to 카테고리와 카테고리 has_many 포스트. 포스트 및 카테고리 내가 PostsController에서 보석 globalize3

class Post < ActiveRecord::Base 
    belongs_to :category 
    translates :title, :excerpt, :desC# globalize3 
end 

class Category < ActiveRecord::Base 
    has_many :posts 
    translates :name # globalize3 
end 

와 세계화 있습니다 나는 코드 줄에 모든 게시물 수 :

def index 
    @posts = Post.includes([:translations, {:category => :translations}]) 
end 

문제는 내가 카테고리의 번역과 N + 1 쿼리 문제가 있다는 것입니다 표 :

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)) 

어떻게이 n + 1 쿼리 문제를 해결할 수 있습니까?

Answer 1

번역을 모델에서 열렬하게로드해야합니다. 이 작업을 수행하는 권장 방법은 다음과 같습니다

class Category < ActiveRecord::Base 
    has_many :posts 
    translates :name # globalize3 

    default_scope includes(:translations) 
end 

Answer 2

레일 4 :

class Category < ActiveRecord::Base 
    has_many :posts 
    translates :name 

    default_scope { includes(:translations) } 
end 

: 마이클 Szajbe에서 답을 가지고가는 것은이 여전히 약간의 수정과 함께 작동