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

Comments

Post a Comment

Popular posts from this blog

asp.net - repeatedly call AddImageUrl(url) to assemble pdf document -

i'm using abcpdf , i'm curious if can recursively call addimageurl() function assemble pdf document compile multiple urls? something like: int pagecount = 0; int theid = thedoc.addimageurl("http://stackoverflow.com/search?q=abcpdf+footer+page+x+out+of+", true, 0, true); //assemble document while (thedoc.chainable(theid)) { thedoc.page = thedoc.addpage(); theid = thedoc.addimagetochain(theid); } pagecount = thedoc.pagecount; console.writeline("1 document page count:" + pagecount); //flatten document (int = 1; <= pagecount; i++) { thedoc.pagenumber = i; thedoc.flatten(); } //now try again theid = thedoc.addimageurl("http://stackoverflow.com/questions/1980890/pdf-report-generation", true, 0, true); //assemble document while (thedoc.chainable(theid)) { thedoc.page = thedoc.addpage(); theid = thedoc.addimagetoc...
Read more

java - Android recognize cell phone with keyboard or not? -

in android app, want detect user's device if device has keyboard(like motorola milestone) , show corresponding user interface. guys know how that? ! regards justicepenny http://developer.android.com/reference/android/content/res/configuration.html public int keyboard the kind of keyboard attached device. 1 of: keyboard_nokeys, keyboard_qwerty, keyboard_12key. that's it!
Read more

iphone - How would you achieve a LED Scrolling effect? -

how achieve led scrolling effect example below? led sign - led ticker emulator iphone , ipad http://img.skitch.com/20101201-rsfh4p1bajb1wp94k466pdpiuj.preview.jpg sometimes remunerates comment in other posts :) have put code you, should implement font '8pin matrix' realistic feeling. uilabel *label; - (void)viewdidload { [super viewdidload]; label = [[uilabel alloc]initwithframe:cgrectmake(10, 50, 300, 20)]; label.font = [uifont fontwithname:@"courier-bold" size:16.0]; label.backgroundcolor = [uicolor blackcolor]; label.textcolor = [uicolor greencolor]; label.linebreakmode = uilinebreakmodecharacterwrap; // otherwise "…" label.text = @"this led text scrolled "; // blanks space between [self.view addsubview:label]; [nstimer scheduledtimerwithtimeinterval:0.12f target:self selector:@selector(scrolllabel) use...
Read more