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ionis id:ionis

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ActiveRecordã‚’é€Ÿãã—ãŸã„ã ã‘ã®äººç”Ÿã ã£ãŸ - Qiita
Help us understand the probl em. 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‚’èªžã£ã¦ã¿ãŸã„ã€‚ ã¨ã¦ã‚‚é•·ã„ã®ã§ã€ãƒ€ãƒ«ã„äººã¯æœ€åˆã¨æœ€å¾Œã ã‘èªã‚ã°ã‚ˆã„ã§ã™ã€‚ TL;DR ç’°å¢ƒ: Ruby 2.1.5 ARã‚ªãƒ–ã‚¸ã‚§ã‚¯ãƒˆã‚’å¤§é‡ã«(ã–ã£ãã‚Š750kãã‚‰ã„)loadã™ã‚‹ãƒãƒƒãƒå‡¦ç† 3.2ç³»ã§ã®å®Ÿè¡Œæ™‚é–“ã¯ç´„480secã€ 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‚‰ARã‚ªãƒ–ã‚¸ã‚§ã‚¯ãƒˆã®1attributeæ¯Žã«Objectç”Ÿæˆã™ã‚‹ã®ã§é…ã„ GCã®æ™‚é–“ã‚‚å¢—ãˆãŸ èª¿æŸ»æ–¹æ³•: Githubã®commitã€Issueã‚’
ionis 2015/04/15
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ãƒ‡ãƒ¼ã‚¿ãƒ™ãƒ¼ã‚¹ã«æ ¼ç´ã•ã‚Œã‚‹æƒ…å ±ã¯ï¼Œã€Œä½œæˆæ—¥æ™‚ã€ã‚„ã€Œæ›´æ–°æ—¥æ™‚ã€ã‚’ä»˜ä¸Žã™ã‚‹ã“ã¨ãŒå¤šã„ã€‚ActiveRecordã§ã¯ï¼Œä½œæˆæ—¥æ™‚ã‚„æ›´æ–°æ—¥æ™‚ã«ã¤ã„ã¦ï¼Œæš—é»™çš„ã«ã‚»ãƒƒãƒˆã™ã‚‹æ©Ÿæ§‹ãŒæ¨™æº–ã§å‚™ã‚ã£ã¦ã„ã‚‹ã€‚ä¾‹ãˆã°ï¼Œ class CreateEmployees < ActiveRecord::Migration def self.up create_table :employees do |t| ãƒ»ãƒ»ãƒ» t.column :created_at, :timestamp t.column :updated_at, :timestamp end end ãƒ»ãƒ»ãƒ» end ã¨ã„ã†ã‚ˆã†ã«è¡¨ã‚’ä½œæˆã—ã¦ãŠã‘ã°ï¼Œcreated_atã«insertã•ã‚ŒãŸã¨ãã®ä½œæˆæ—¥æ™‚ãŒï¼Œupdated_atã«ã¯updateãŒã‹ã‹ã‚‹åº¦ã«ãã®æ™‚ã®æ—¥æ™‚ãŒæ›´æ–°æ—¥æ™‚ã¨ã—ã¦ã‚»ãƒƒãƒˆã•ã‚Œã‚‹ã€‚ãƒ—ãƒã‚°ãƒ©ãƒžãŒæ”¹ã‚ã¦ã€Œemp.updated_at = Time.nowã€ãª
ionis 2008/12/10
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ionis 2008/08/01
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Ruby on Rails - ActiveRecord - â€” ã‚ã‚Šãˆã‚‹ãˆã‚Šã‚
æ–¹é‡ Rubyã‚’çŸ¥ã£ã¦ã„ã‚‹å‰æã§ã™(å‰å›žã®å‹‰å¼·ä¼šã®è³‡æ–™ http://dev.ariel-networks.com/articles/workshop/ruby/) RDBã®åŸºç¤ŽçŸ¥è˜ãŒå‰æã§ã™ ãªã‚‹ã¹ãæ‰‹ã‚’å‹•ã‹ã—ã¦ç›®ã«è¦‹ãˆã‚‹å½¢ã§èª¬æ˜Žã‚’é€²ã‚ã¾ã™ Ruby on Rails(ä»¥ä¸‹ã€Rails)å…¨ä½“ã¯å·¨å¤§ãªã®ã§ã€ActiveRecord(ORMå±¤)ã«è©±ã‚’é™å®šã—ã¾ã™(Webå±¤ã¯æ¬¡å›ž) Webã‹ã‚‰åˆ‡ã‚Šé›¢ã—ã¦irb or ã‚³ãƒžãƒ³ãƒ‰ãƒ©ã‚¤ãƒ³ã§ActiveRecordã‚’ä½¿ã„ã¾ã™
ionis 2008/08/01
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Ruby on Rails
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Boosting ActiveRecord Performance - igvita.com
ionis 2008/05/28
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é€£è¼‰: IBM Watson Workspace #é¬¼ã‚ã‹ ã‚¢ãƒ—ãƒªã‚±ãƒ¼ã‚·ãƒ§ãƒ³é–‹ç™º: ç¬¬ 7 å›ž: IBM Watson Workspace ã§ AI ã‚’åˆ©ç”¨ã—ãŸã‚¢ãƒ—ãƒªé€£æºã®å®Ÿç¾ #é¬¼ã‚ã‹ è§£èª¬ï¼ˆå‰ç·¨ï¼‰
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ionis 2008/05/16
activerecord

Ruby on Rails
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