Rails 3包括翻譯globalize3 activerecord

我有這個模式：發佈belongs_to類別和類別has_many發佈。郵政和類別與寶石globalize3Rails 3包括翻譯globalize3 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

在我的PostsController全球化我與這行代碼的所有帖子：

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

的問題是，我有類翻譯N + 1查詢問題表：

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))

我該如何解決這個n + 1查詢問題？

來源

2010-12-02 Pioz

您應該在模型中啓用急切的翻譯加載。推薦的方式來做到這一點是：

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

    default_scope includes(:translations) 
end

來源

2013-10-02 09:19:09

軌道4：

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

    default_scope { includes(:translations) } 
end

：以從米哈爾Szajbe答案，這仍然有輕微的改裝工程

來源

2015-12-08 10:48:04 Chris

Rails 3包括翻譯globalize3 activerecord

回答

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