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ActiveRecordを速ãã—ãŸã„ã ã‘ã®äººç”Ÿã ã£ãŸ - Qiita
Help us understand the problem. What is going on with this article? Rails3.2ã‹ã‚‰Rails4.2ã«ä¸Šã’ãŸã‚‰ActiveRecordãŒé…ããªã£ãŸã®ã§ã€ã©ã†ã‚„ã£ã¦èª¿æŸ»ã—ã¦ã€ã©ã®ã‚ˆã†ã«å¯¾å‡¦ã—ãŸã‹ã‚’語ã£ã¦ã¿ãŸã„。 ã¨ã¦ã‚‚é•·ã„ã®ã§ã€ãƒ€ãƒ«ã„人ã¯æœ€åˆã¨æœ€å¾Œã ã‘èªã‚ã°ã‚ˆã„ã§ã™ã€‚ TL;DR 環境: Ruby 2.1.5 ARオブジェクトを大é‡ã«(ã–ã£ãã‚Š750kãらã„)loadã™ã‚‹ãƒãƒƒãƒå‡¦ç† 3.2ç³»ã§ã®å®Ÿè¡Œæ™‚é–“ã¯ç´„480sec〠4.2ç³»ã§ã¯ç´„2900sec ç´„6å€ã®æ€§èƒ½åŠ£åŒ– åŽŸå› : preloadã§æ€§èƒ½åŠ£åŒ–ã—ã¦ãŸ CollectionProxyã®ç”Ÿæˆå‘¨ã‚Šã§é…ããªã£ã¦ãŸ Rails4ã‹ã‚‰ARオブジェクトã®1attribute毎ã«Object生æˆã™ã‚‹ã®ã§é…ã„ GCã®æ™‚間も増ãˆãŸ 調査方法: Githubã®commitã€Issueã‚’
Railsã¨å‘¨è¾ºã®TimeZoneè¨å®šã‚’æ•´ç†ã™ã‚‹ (active_record.default_timezoneã®ç½ ) - Qiita
æ•´ç† ã¾ãšã€ã“ã“ã¾ã§ã§ä¸€æ—¦æ•´ç†ã™ã‚‹ã€‚ Time.nowã¯Rubyã®çµ„ã¿è¾¼ã¿ãªã®ã§ã‚·ã‚¹ãƒ†ãƒ ã®ã‚¿ã‚¤ãƒ ゾーンã—ã‹è¦‹ãªã„。OSã®æ™‚é–“ã¨å¸¸ã«ä¸€è‡´ã™ã‚‹ã€‚Time.localã®å‡ºåŠ›çµæžœã‚‚OSã®ã‚¿ã‚¤ãƒ ゾーンã¨ä¸€è‡´ã™ã‚‹ã€‚ TimeWithZoneクラスã¯config.time_zoneã«å·¦å³ã•ã‚Œã‚‹ã€‚ Ruby組ã¿è¾¼ã¿ã®ãƒ¡ã‚½ãƒƒãƒ‰ã§å–å¾—ã—ãŸUTCã®æ™‚間を基準ã«ã€è¨å®šã•ã‚Œã¦ã„るタイムゾーンã®æ™‚é–“ã«å¤‰æ›ã™ã‚‹ã€‚ ActiveRecordã®ã‚¤ãƒ³ã‚¹ã‚¿ãƒ³ã‚¹ã«å¯¾ã—ã¦ã‚¢ã‚¯ã‚»ã‚µã‚’利用ã—ã¦æ™‚é–“ã‚’ã‚„ã‚Šå–ã‚Šã™ã‚‹å ´åˆã¯TimeWithZoneã§è¡Œã‚れる。 ä»®ã«Timeクラスを渡ã—ã¦ã‚‚代入時ã«TimeWithZoneã«å¤‰æ›ã•ã‚Œã‚‹ã€‚ config.active_record.default_timezoneã®è¨å®šã¯DBã‚’èªã¿æ›¸ãã™ã‚‹éš›ã«ã€DBã«è¨˜éŒ²ã•ã‚Œã¦ã„る時間をTime.utcã§èªã‚€ã‹Time.localã§èªã‚€ã‹ã‚’è¨å®šã™ã‚‹ã€‚ :utcã®å ´
Preforkサーãƒã§Octopusを使ã†ã¨ãã®DBコãƒã‚¯ã‚·ãƒ§ãƒ³ç®¡ç† - ã‘ã‚“ã¡ã‚ƒã‚“ãã‚“ã•ã‚“ã®Web日記
unicornã«ä»£è¡¨ã•ã‚Œã‚‹prefork(ã™ã‚‹)サーãƒã§ã¯ã€DBã¸ã®ã‚³ãƒã‚¯ã‚·ãƒ§ãƒ³ã®ã‚ˆã†ãªå„プãƒã‚»ã‚¹ã§å…±æœ‰ã—ã¦ã¯ã„ã‘ãªã„リソースをbefore_forkã¨after_forkã§é©åˆ‡ã«ç®¡ç†ã™ã‚‹å¿…è¦ãŒã‚る。 ãµã¤ã†ã®Rails Applicationã¯ä»¥ä¸‹ã®ã‚ˆã†ã«ã€ARã®ã‚³ãƒã‚¯ã‚·ãƒ§ãƒ³ã‚’ã¯ã‚ŠãªãŠã—ã¦ã„ã‚‹ã¨æ€ã†ã€‚ before_fork do |server, worker| ActiveRecord::Base.connection.disconnect! end after_fork do |server, worker| ActiveRecord::Base.establish_connection end ã—ã‹ã—ã€Octopusを使ã£ã¦ã„ã‚‹å ´åˆã¯ã“ã‚Œã ã‘ã§ã¯ä¸å分ã§ã€ã“ã®ã¾ã¾ã ã¨å†èµ·å‹•ç›´å¾Œã«ã‚¨ãƒ©ãƒ¼ãŒå¤§é‡ã«å‡ºã‚‹ã“ã¨ã«ãªã‚‹ã€‚今関ã‚ã£ã¦ã„るプãƒã‚¸ã‚§ã‚¯ãƒˆã§ã¯NoMethodError: undefi
ActiveRecordã§strict_modeを無効ã«ã™ã‚‹ - Qiita
Rails 4.0ã‹ã‚‰ActiveRecordã«strict_modeãŒå°Žå…¥ã•ã‚Œã€ãƒ‡ãƒ•ã‚©ãƒ«ãƒˆã§ã¯æŽ¥ç¶šæ™‚ã«sql_mode = STRICT_ALL_TABLESをセットã™ã‚‹ã‚ˆã†ã«ãªã‚Šã¾ã—ãŸã€‚ ã“ã‚Œã¯ã€æ—¢ã«é‹ç”¨ã•ã‚Œã¦ã„ã‚‹DBã«æŽ¥ç¶šã™ã‚‹ç‰ãªã‚“らã‹ã®ç†ç”±ã§MySQLå´ã§é©åˆ‡ãªè¨å®šãŒè¡Œãˆã¦ã„ãªã„å ´åˆæœ‰ç”¨ãªå‹•ä½œã§ã™ãŒã€ãã†ã§ãªã„å ´åˆã€ã‚µãƒ¼ãƒãƒ¼å´ã®è¨å®šã‚’é‘‘ã¿ãšã«ã‚¯ãƒ©ã‚¤ã‚¢ãƒ³ãƒˆå´ãŒè¨å®šã‚’上書ãã™ã‚‹ã¹ãã§ã¯ãªã„ã§ã—ょã†ã€‚ ãã®ãŸã‚ã€database.ymlã§strict: falseã¨è¨å®šã™ã‚‹ã“ã¨ã§ã“ã®å‹•ä½œã‚’無効ã«ã™ã‚‹ã“ã¨ãŒã§ãã¾ã—ãŸãŒã€Rails 4.2.0ã§ã¯ã“ã®å‹•ä½œãŒå¤‰æ›´ã•ã‚Œã€strict: falseã®ã¨ãã¯strictã§ãªã„状態ã«ã™ã‚‹ãŸã‚sql_mode = ''をセットã™ã‚‹ã‚ˆã†ã«ãªã‚Šã¾ã—ãŸã€‚ MySQLã®ãƒ‡ãƒ•ã‚©ãƒ«ãƒˆã®sql_modeã«ä¾å˜ã—ã¦æ—¢ã«é€šã£ã¦ã„ãŸã¯ãšã®ãƒ†ã‚¹ãƒˆãŒé€šã‚‰ãªã‹ã£ãŸã‚Šã™ã‚‹ã“ã¨ãŒã‚
ADSL by Bocete
ADSL - Abstract Data Store Library Project maintained by Bocete Hosted on GitHub Pages — Theme by mattgraham ADSL - Abstract Data Store Library ADSL is a gem for formal verification of Ruby on Rails models. Simply include it in your Gemfile, write a few invariants (rules) about ActiveRecord data that you wish to verify (for example, that at any given moment, every Address has a User) and run rake
jijixi's diary - ActiveRecord::Dirty ã«æ°—を付ã‘ã‚
This domain may be for sale!
Ryan's Scraps: What's New in Edge Rails: Has Finder Functionality
It looks like Nick Kallen’s wildly popular has_finder plugin will be making its way into Rails 2.x in the form of named_scope. Observe: class User < ActiveRecord::Base named_scope :active, :conditions => {:active => true} named_scope :inactive, :conditions => {:active => false} named_scope :recent, lambda { { :conditions => ['created_at > ?', 1.week.ago] } } end # Standard usage User.active # same
Railså‹‰å¼·ä¼šï¼ æ±äº¬ç¬¬24回(PofEAAã®4ã¤ã®ORMパターンã¾ã¨ã‚) - ヽ( ・∀・)ノãã¾ãã¾ãƒ¼(2007-11-18)
パターンåã¨å®Ÿè£…åã«åŒã˜ç‰©ãŒå¤šãã¦ã‚„ã‚„ã“ã—ã„ã®ã§ã€P:パターンã€I:実装ã¨ã™ã‚‹ã€‚以下ã¯(※1)ã€å‹‰å¼·ä¼šã§ã®è©±ã‚ã‚‹ã„ã¯èˆžæ³¢ã®èªè˜ã§ã‚ã‚‹ã®ã§å®Ÿéš›ã¨é•ã£ã¦ã„ã‚‹å¯èƒ½ã‚‚ã‚ã‚Šã€ãã‚Œã«ã‚ˆã£ã¦ä¸‡ãŒä¸€ã‚ãªãŸãŒè¢«å®³ã‚’ã©ãƒ¼ã®ãƒ¼ã“ーã®(ry ActiveRecordパターン テーブルã¨ã‚¯ãƒ©ã‚¹ã‚’1:1ã«å¯¾å¿œã•ã›ã‚‹ãƒ‘ターン。勉強会å‚åŠ è€…ã¯AR(I)ã«å½“然馴染ã¿ãŒã‚ã‚‹ã®ã§çœç•¥ã€‚ DataMapperパターン AR(P)ã¨DM(P)ã¯å‡„ãä¼¼ã¦ã„る。パターンã¨ã—ã¦ã®é•ã„ã¯ã€ ARã®ãƒžãƒƒãƒ”ングã¯1:1ã ãŒã€DMã¯1:n (オブジェクトã‹ã‚‰è¦‹ã¦ãƒ†ãƒ¼ãƒ–ルをコンãƒã‚¸ãƒƒãƒˆå¯èƒ½) DMã¯ã‚¹ã‚ーマ定義をæŒã¤ ã§ã‚る。実装的ã«ã¯ã€AR(I)ã¯æ©Ÿèƒ½2をマイグレーションã¨ã—ã¦æŒã¤ãŸã‚ã€ãƒžãƒƒãƒ”ングãŒ1:1ã§ã‚ã‚Œã°å®Œå…¨ã«åŒä¸€ã ã¨è¨€ãˆã‚‹ã€‚よã£ã¦ã€ä»¥ä¸‹ã®ã‚„ã‚„ã“ã—ã„çµè«–を得る。 AR(P)≠DM(P) ã§ã‚る㌠AR(I)≒DM(P) ã¦ã“ã¨ã§ã€Dat
ヽ( ・∀・)ノãã¾ãã¾ãƒ¼(2006-07-04)
â— [Rails] ScopedAccess ScopedAccess プラグインを更新ã—ã¾ã—ãŸã€‚実ã¯ä»Šã¾ã§ã¯ production モードã§ã¯æ£ã—ãå‹•ã‹ãªã‹ã£ãŸã®ã§ã™ãŒã€ä»Šå›žã®ä¿®æ£ã§ä½¿ãˆã‚‹ã‚ˆã†ã«ãªã£ãŸã¯ãšã§ã™ã€‚ [ä¿®æ£ç‚¹] dispatcher ã§ãƒªã‚¯ã‚¨ã‚¹ãƒˆæ¯Žã« AR.scoped_methods をクリア Filter#before ã§æ¡ä»¶ã‚’ã‚ャッシュã—ã¦ãŸä¸å…·åˆã‚’ä¿®æ£ (thanks to Nikhil) method_scoping ä¸ã® MethodScoping ã‚’ ClassScoping ã«è‡ªå‹•å¤‰æ› ※ 1,2 㯠production ã¸ã®å¯¾å¿œã§ã™ã€‚ [svn] http://wota.jp/svn/rails/plugins/branches/stable/scoped_access [使ã„æ–¹] コードã¯ã„ã¤ã‚‚ã¨ä¸€ç·’ class BlogController < App
iar - ActiveRecordを使ã£ãŸå¯¾è©±åž‹ã®SQLクライアント - 2nd life (移転ã—ã¾ã—ãŸ)
昨日ã®mysqlarã«ã€ã€Žæ‹ã¨ãƒãƒƒã‚¯ã¯ã‚¢ã‚¸ãƒ£ã‚¤ãƒ«ãŒå‘½ï¼ã€ã§æœ‰åãªã‹ãšã²ã“ã•ã‚“ãŒpatchを書ã„ã¦ä¸‹ã•ã‚Šã€ã‹ã¤iar (Interactive ActiveRecord) ã¨ã„ã†ã‚ャッãƒãƒ¼ãªåå‰ã‚’ã¤ã‘ã¦ãã‚Œã¾ã—ãŸã€‚åå‰é‡è¦ï¼ MySQLã˜ã‚ƒãªã„ã¨å‹•ã‹ãªã„ã‹ãªãƒ¼ã€ã¨æ€ã£ã¦ãŸã‚“ã§ã™ãŒã€adapterå·®ã—替ãˆãŸã ã‘ã§ä»–ã§ã‚‚普通ã«å‹•ãよï¼ã¨ã„ã†ã‚ã‘ã§sqliteã‚„postgresqlãªã‚“ã‹ã§ã‚‚å‹•ãã¾ã™ã€‚ä»–ã«ã‚‚firebird sqlserverã§ã‚‚å‹•ãã‹ã‚‚。 起動㯠iar -a sqlite -t db/development.db ãªã‚“ã‹ã§ã€‚特ã«sqliteã®å¯¾è©±ã‚¤ãƒ³ã‚¿ãƒ¼ãƒ•ã‚§ã‚¤ã‚¹ã¯è²§å¼±ãªã®ã§ã‹ãªã‚Šå¬‰ã—ã„ã‹ã‚‚。ソース㯠http://rails2u.com/misc/iar.txt ã«ç½®ã„ã¦ãŠãã¾ã—ãŸã€‚ ã§ã€ã¡ã‚‡ã£ã¨ã—㟠irb tips。通常 irb ã§ã¯æˆ»ã‚Šå€¤ã®inspectã—ãŸå€¤ã‚’表示ã—ã¦ã
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rails-sqlserver/activerecord-sqlserver-adapter: SQL Server Adapter For Rails
http://blog.hasmanythrough.com/articles/2006/04/21/self-referential-through
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