Rails 3 includes translations globalize3 activerecord -

i have schema: post belongs_to category , category has_many post. post , category globalize gem 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 

in postscontroller posts line of code:

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

the problem have n+1 query problem category translations table:

post load (0.3ms)  select "posts".* "posts"  post::translation load (0.3ms)  select "post_translations".* "post_translations" ("post_translations".post_id in (2,3,4))  # start n+1 query block category load (1.9ms)  select "categories".* "categories" ("categories"."id" in (9,12,11)) category::translation load (0.4ms)  select "category_translations".* "category_translations" ("category_translations".category_id = 9) , ("category_translations"."locale" in ('it')) cache (0.0ms)  select "category_translations".* "category_translations" ("category_translations".category_id = 9) , ("category_translations"."locale" in ('it')) category::translation load (0.2ms)  select "category_translations".* "category_translations" ("category_translations".category_id = 12) , ("category_translations"."locale" in ('it')) cache (0.0ms)  select "category_translations".* "category_translations" ("category_translations".category_id = 12) , ("category_translations"."locale" in ('it')) category::translation load (0.2ms)  select "category_translations".* "category_translations" ("category_translations".category_id = 11) , ("category_translations"."locale" in ('it')) cache (0.0ms)  select "category_translations".* "category_translations" ("category_translations".category_id = 11) , ("category_translations"."locale" in ('it')) # end n+1 query block  category::translation load (0.5ms)  select "category_translations".* "category_translations" ("category_translations".category_id in (9,12,11)) 

how can solve n+1 query problem?

you should enable eager loading of translations in model. recommended way is:

class category < activerecord::base   has_many :posts   translates :name # globalize3    default_scope includes(:translations) end