Railsã§joinsを多段ãƒã‚¹ãƒˆã™ã‚‹æ–¹æ³•ï¼ˆè¦ªã‹ã‚‰æ›¾å«ã¾ã§ï¼‰ - QiitaDeleted articles cannot be recovered. Draft of this article would be also deleted. Are you sure you want to delete this article?
Qiitaã®ãƒˆãƒƒãƒ—ページã®ãƒ•ã‚£ãƒ¼ãƒ‰ã®è¨è¨ˆ - ✘╹◡╹✘
@ainame user.articles.preload(:comments, :stocks_count) ã¿ãŸã„ã«stocks_countã®ã‚ˆã†ãªassociationを生やã—ã¦ãŠã‚Šã€stocks_countã®å†…部実装ã¯PreloaderãŒå¼„られã¦ã„ã¦IDã ã‘å–ã£ã¦ã‚‹â€” 内製フレームワーク (@r7kamura) 2015, 8月 23 @ainame ã“れを抽象化ã™ã‚‹ãŸã‚ã«ã€Article.has_many(:stocks, counter: true) ã¿ãŸã„ã«ã™ã‚‹ã¨ã€article.stocksã¨article.stocks_countãŒã»ã¼åŒã˜SQLã§åŒæ™‚ã«å®šç¾©ã•ã‚Œã‚‹ã‚ˆã†ã«ãªã£ã¦ã‚‹â€” 内製フレームワーク (@r7kamura) 2015, 8月 23 @ainame ãれを実ç¾ã—ã¦ã„る実装ãŒã“ã‚Œã§ã™ / k0kubun/activerecord-precount https:
find_by_sql ã—ãŸãƒ¬ã‚³ãƒ¼ãƒ‰ã§ preload ã™ã‚‹æ–¹æ³• - ãŠã‚‚ã—ã‚webサービス開発日記
ã©ã†ã—ã¦ã‚‚ AR ã® query methods ã ã‘ã§ã¯è¦æ±‚を満ãŸã›ãªã„å ´åˆã®æœ€å¾Œã®æ‰‹æ®µã¨ã—ã¦ã€find_by_sql メソッドãŒã‚ã‚Šã¾ã™ã€‚皆ã•ã‚“よã使ã£ã¦ã‚‹ã¨æ€ã†ã®ã§ã™ãŒã€æˆ»ã‚Šå€¤ã®ãƒ¬ã‚³ãƒ¼ãƒ‰ã‹ã‚‰ã•ã‚‰ã« association ã‚’ãƒãƒ¼ãƒ‰ã—よã†ã¨ã™ã‚‹ã¨ N+1 ã«ãªã‚‹ã‚±ãƒ¼ã‚¹ãŒã‚ã‚Šã¾ã™ã€‚ã‹ã¨ã„ã£ã¦ User.preload(:comments).find_by_sql(sql) ã®ã‚ˆã†ã«ã—ã¦ã‚‚期待通りã«ã¯å‹•ãã¾ã›ã‚“。å˜ç´”ã« preload 部分ãŒç„¡è¦–ã•ã‚Œã‚‹ã ã‘ã§ã™ã€‚ ã§ã¯ã©ã®ã‚ˆã†ã«æ›¸ã„ãŸã‚‰ã‚ˆã„ã§ã—ょã†ã‹ã€‚ 次ã®ã‚ˆã†ã«æ›¸ãã¨æœŸå¾…通りã«å‹•ãã¾ã™(Rails 4.2.1 ã§è©¦ã—ã¦ã„ã¾ã™)。 records = User.find_by_sql(sql) ActiveRecord::Associations::Preloader.new.preload( records, :comments ) re
ActiveRecord::Base API ã‚’èªã‚€éš›ã«å‚考ã«ã—ãŸãƒšãƒ¼ã‚¸ - Qiita
ActiveRecord::Persistence becomes This is mostly useful in relation to single-table inheritance structures where you want a subclass to appear as the superclass. touch! touch, touch, updated_at ã« touch 親å関係ã®ã‚るモデルã§ã€åモデルを更新ã—ãŸæ™‚ã«è¦ªãƒ¢ãƒ‡ãƒ«ã®updated_atã‚‚æ›´æ–°ã—ãŸããªã£ãŸã€‚ ActiveRecord::NoTouching no_touching Ruby on Rails 4.1 Release Notes #6(Active Record) touchを無効化ã™ã‚‹ ActiveRecord::Base.no_touching ãŒè¿½åŠ ã•ã‚Œã¾ã—ãŸã€‚ update Ra
è«–ç†å‰Šé™¤gemã‚’1å¹´ã»ã©ä¿å®ˆã—ã¦ã¿ã¦ã€‚é‡å¤§ãªæ¬ 点ã«ã‚„ã£ã¨æ°—ã¥ã„ãŸãƒã‚¨ãƒ 。 - 波打際ã®ãƒ–ãƒã‚°ã•ã‚“
ã¯ã˜ã‚ã« kakurenboã¨ã„ã†gemã¯ã”å˜çŸ¥ã§ã—ょã†ã‹ï¼Ÿparanoiaã®æ¬ 点を克æœã™ã¹ã1å¹´ã»ã©å‰ã«ç§ãŒé–‹ç™ºã‚’始ã‚ãŸgemã§ã™ã€‚(å‚考：Rails4ã¨3ã§è«–ç†å‰Šé™¤ã‚’è¡Œã†ãŸã‚ã®Gem Kakurenbo ã®ç´¹ä»‹ã¨ä»Šæ›´è«–ç†å‰Šé™¤Gemを実装ã—ãŸç†ç”±ã€‚ - 波打際ã®ãƒ–ãƒã‚°ã•ã‚“) issueã‚„pullrequestã‚’é€ä¿¡ã—ã¦ãã ã•ã‚‹å–„æ„ã®ã‚³ãƒŸãƒƒã‚¿ãƒ¼ã®æ–¹ã€…ã«æ”¯ãˆã‚‰ã‚ŒãªãŒã‚‰1å¹´ã»ã©ä¿å®ˆã‚’ã—ã¦ãã¾ã—ãŸã€‚ãã®ä¸Šã§è–„々ã¯æ°—ãŒã¤ã„ã¦ã„ãŸã®ã§ã™ãŒã€ã©ã†ã—ã¦ã‚‚èªã‚られãªã‹ã£ãŸé‡å¤§ãªæ¬ 点をãƒãƒƒã‚リã¨èªè˜ã•ã›ã‚‰ã‚ŒãŸã®ã§ãƒã‚¨ãƒ ã«ã—ã¾ã—ãŸã€‚ è«–ç†å‰Šé™¤gemã®èµ·æº kakurenboã‚‚paranoiaã‚‚ã€å»ƒã‚Œã¦ã—ã¾ã£ãŸ acts_as_paranoid ã‚’å†å®Ÿè£…ã—ãŸã‚‚ã®ã§ã™ã€‚ ã“れらã®gemã¯å°Žå…¥ã™ã‚‹ã ã‘ã§ã€ã„ã¤ã‚‚使ã£ã¦ã„ã‚‹destroyメソッドãŒè«–ç†å‰Šé™¤ãƒ¡ã‚½ãƒƒãƒ‰ã«æ—©å¤‰ã‚ã‚Šã™ã‚‹ç´ 晴らã—ã„gem...ã«ãªã‚‹ã¯ãšã ã£ãŸã®ã§
ActiveRecordを高速化ã™ã‚‹AdequateRecordã¯ä½•ã‚’ã™ã‚‹ã‚‚ã®ã‹ - Qiita
TL;DR AdequateRecordã¯ActiveRecordã®æ©Ÿèƒ½ã®åå‰ æ–°ã—ã„gemã¨ã‹ã§ã¯ç„¡ã„ #find #find_by ãã—㦠#find_by_XXXã‚’2å€ã«é«˜é€ŸåŒ–ã™ã‚‹ 引用: AdequateRecord Proâ„¢: Like ActiveRecord, but more adequate | Tenderlovemaking 内部的ã«ã¯ã‚¯ã‚¨ãƒªå‘¼ã³å‡ºã—ã®åº¦ã«ActiveRecordãŒç”Ÿæˆã™ã‚‹ã‚ªãƒ–ジェクトをã‚ャッシュã™ã‚‹ 対象を#findãªã©ã«é™ã£ã¦ã„ã‚‹ã®ã¯ã€ç”Ÿæˆã•ã‚Œã‚‹ã‚ªãƒ–ジェクトやæ¡ä»¶ãŒå˜ç´”ã ã‹ã‚‰ Rails 4.2.0 beta1 リリース 先日Rails 4.2.0 beta1ãŒãƒªãƒªãƒ¼ã‚¹ã•ã‚Œã¦ã€ãã®ãƒªãƒªãƒ¼ã‚¹ãƒ–ãƒã‚°ã®ä¸ã«Adequate Recordãªã‚‹ã‚‚ã®ãŒ ActiveRecordã®å‹•ä½œ ActiveRecordã®#whereãªã©ã‚’使ã£ã¦DBã‹ã‚‰ãƒ¬ã‚³ãƒ¼ãƒ‰ã‚’引ã£å¼µã£
Scala版「ActiveRecordã€ã‚’公開ã—ãŸASEã€Scalaã§ã®é–‹ç™ºå®Ÿç¸¾ã¯æ—¢ã«5件以上
アドヴァンスト・ソフト・エンジニアリング（ASE）ã¯ã€ãƒ—ãƒã‚°ãƒ©ãƒŸãƒ³ã‚°è¨€èªžã€ŒScalaã€ã§ã®é–‹ç™ºã‚’å¾—æ„ã¨ã™ã‚‹ã‚½ãƒ•ãƒˆãƒã‚¦ã‚¹ã 。ã“ã‚Œã¾ã§ã®Scalaã§ã®å—託開発ã®å®Ÿç¸¾ã¯ã€å®˜å…¬åºã‚„金èžç³»ä¼æ¥ã€Webサービスã®ä¼æ¥ãªã©5件以上ã«ä¸Šã‚‹ã€‚ åŒç¤¾ã¯å¾“æ¥ã€Javaã‚„Rubyã§ã®ã‚·ã‚¹ãƒ†ãƒ 開発をä¸å¿ƒã«æ‰‹æŽ›ã‘ã¦ã„ãŸãŒã€2010å¹´ã«ã‚る金èžç³»ä¼æ¥ã‹ã‚‰Scalaã§ã®é–‹ç™ºã‚’打診ã•ã‚Œã€åˆ©ç”¨ã—ãŸã“ã¨ã‚’ãã£ã‹ã‘ã«ã€ã€ŒæŠ€è¡“者ãŒScalaã¯é¢ç™½ã„ã¨æ°—ã«å…¥ã‚Šã€ï¼ˆåŒç¤¾æŠ€è¡“開発部部長ã®è—¤å·èŒ‚ç« æ°ï¼‰ã€äººæ育æˆã‚’強化。ãれ以é™ã€Scalaã®ã‚¹ã‚ルをæŒã£ãŸäººæãŒã„ã‚‹ã“ã¨ã‚’会社ã®å¼·ã¿ã¨ã—ã¦æ‰“ã¡å‡ºã™ã‚ˆã†ã«ãªã£ãŸã€‚ 以å‰ã¯å¤§æ‰‹ãƒ™ãƒ³ãƒ€ãƒ¼ã‹ã‚‰ã®äºŒæ¬¡è«‹ã‘ã®æ¡ˆä»¶ãŒå¤šã‹ã£ãŸãŒã€Scalaã«å–り組ã¿å§‹ã‚ãŸã“ã¨ã‚’æ©Ÿã«ã€ŒScalaã§ãœã²é–‹ç™ºã—ã¦ã»ã—ã„ã¨ã€ãƒ¦ãƒ¼ã‚¶ãƒ¼ä¼æ¥ã‹ã‚‰ç›´æŽ¥å½“社ã«æŒ‡åãŒå…¥ã‚Šã€æ¡ˆä»¶ã‚’ç²å¾—ã§ãるケースãŒå¢—ãˆã¦ããŸã€ï¼ˆè—¤å·æ°ï¼‰ã¨ã„ã†ã€‚ç¾åœ¨é€²è¡Œä¸ã®æ¡ˆä»¶ã§
ã¯ã¦ãªãƒ–ãƒã‚° | 無料ブãƒã‚°ã‚’作æˆã—よã†
水風呂ã®ã™ã‚゠毎日ã‚ã¡ã‚ƒãã¡ã‚ƒã«æš‘ã„。 ã“ã“数年「ãŠã‚ˆã’!ãŸã„ã‚„ããã‚“ã€ã®ã‚ˆã†ã«æ˜¼é–“ã¯å¤ªé™½ã¨ã‚ªãƒ•ã‚£ã‚¹ãƒ“ルã¨ã‚¢ã‚¹ãƒ•ã‚¡ãƒ«ãƒˆã®ä¸‰æ–¹å‘ã‹ã‚‰æŠ¼ã—寄ã›ã‚‹35℃オーãƒãƒ¼ã®ç†±ã«æŒŸã¾ã‚Œã€å¤œã«ãªã£ã¦ã‚‚最低気温ãŒ27℃ãらã„ã¾ã§ã—ã‹ä¸‹ãŒã‚‰ãªã„。ãã‚“ãªç†ä¸å°½ãªæ±äº¬é‹ã®ä¸ã®æš®ã‚‰ã—ãŒæ¯Žå¹´ã®ã“ã¨ã«ãªâ€¦
1
ランã‚ング
ランã‚ング
ランã‚ング
リリースã€éšœå®³æƒ…å ±ãªã©ã®ã‚µãƒ¼ãƒ“スã®ãŠçŸ¥ã‚‰ã›
最新ã®äººæ°—エントリーã®é…ä¿¡
j次ã®ãƒ–ックマーク
kå‰ã®ãƒ–ックマーク
lã‚ã¨ã§èªã‚€
eコメント一覧を開ã
oページを開ã
[Ruby] 例ãˆã°ã€ActiveRecord ã® connection_pool ã‚’æ¢ã‚ã‚‹ - sonots:blog![[Ruby] 例ãˆã°ã€ActiveRecord ã® connection_pool ã‚’æ¢ã‚ã‚‹ - sonots:blog](https://cdn-ak-scissors.b.st-hatena.com/image/square/da78a05937633f7a2b4b2219826151c370cd607b/height=288;version=1;width=512/https%3A%2F%2Fparts.blog.livedoor.jp%2Fimg%2Fusr%2Fcmn%2Fogp_image%2Flivedoor.png)
{{#tags}}- {{label}}
{{/tags}}