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ransack 㧠xxx_or_null を使ã£ã¦æ¤œç´¢ã§ãるよã†ã«ã™ã‚‹ - Qiita
module Arel module Predications def eq_or_null(other) left = eq(other) right = eq(nil) left.or(right) end def not_eq_or_null(other) left = not_eq(other) right = eq(nil) left.or(right) end def gteq_or_null(other) left = gteq(other) right = eq(nil) left.or(right) end def lt_or_null(other) left = lt(other) right = eq(nil) left.or(right) end def in_or_null(other) left = self.in(other) right = eq(nil)
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MySQLãªã©ã®RDBã§ç‰¹å®šã‚«ãƒ©ãƒ をグルーピングã—ãªãŒã‚‰ã€ãã®ã‚«ãƒ©ãƒ ãŒæœ€å¤§å€¤ã¨ãªã‚‹ãƒ¬ã‚³ãƒ¼ãƒ‰ã®ã¿ã‚’å–り出ã—ãŸã„時ãŒã‚ã‚Šã¾ã™ã€‚ 具体的ã«ã¯ã‚³ãƒ³ãƒ†ãƒ³ãƒ„を最新ã®é–²è¦§é †ã«ä¸¦ã¹ãŸã„å ´åˆãŒãã‚Œã«å½“ãŸã‚Šã¾ã™ãŒã€ã“れを実ç¾ã™ã‚‹ã«ã¯å°‘ã—クエリを工夫ã™ã‚‹å¿…è¦ãŒã‚ã‚Šã¾ã™ã€‚ 何年ã‹å‰ã«Railsã§é–‹ç™ºä¸ã«åŒæ§˜ã®ãƒ¦ãƒ¼ã‚¹ã‚±ãƒ¼ã‚¹ã«ç›´é¢ã—ãŸéš›ã€å½“時自分ã®SQL力ãŒä½Žã„ゆãˆã«2度クエリを発行ã—ã¦ã„ã¾ã—ãŸãŒã€ä»Šæ€ã†ã¨ActiveRecordを使ã£ã¦ã‚‚1クエリã§å®Ÿç¾ã§ãã‚‹ã®ã§ã€ãã®å ´åˆã®å¯¾å¿œæ³•ã‚’紹介ã—ã¾ã™ã€‚ ケーススタディ ユーザーãŒæ˜ 画を閲覧ã—ãŸæ™‚ã«å±¥æ´ãŒä¿å˜ã•ã‚Œã‚‹å ´åˆã€æ˜ ç”»ã‚’é–²è¦§æ—¥é †ã«é‡è¤‡ãªã—ã§ä¸¦ã¹ã‚‹ã‚¯ã‚¨ãƒªã‚’書ã„ã¦ã¿ã¾ã—ょã†ã€‚ 次ã®ã‚ˆã†ãªãƒ†ãƒ¼ãƒ–ル構æˆã‚’想定ã—ã¾ã™ã€‚ ã¾ãŸhistoriesテーブルã«ã¯ä»¥ä¸‹ã®ã‚ˆã†ãªãƒ¬ã‚³ãƒ¼ãƒ‰ãŒæŒ¿å…¥ã•ã‚Œã¦ã„ã¾ã™ã€‚ id user_id movie_id created_at
Rails APIã®ãƒˆãƒ¼ã‚¯ãƒ³èªè¨¼ãŠã‚‚ã£ãŸã‚ˆã‚Šæ¥½ã ã£ãŸã®ã§ç´¹ä»‹ - Qiita
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言ã„ãŸã„ã“㨠webpackã‚’ã‚ã¾ã‚ŠçŸ¥ã‚‰ãªã„人ãŒwebpackerを用ã„ã‚‹ã“ã¨ã§ç°¡å˜ã«å°Žå…¥ã§ãã‚‹ã‘ã©ä»¥ä¸‹ã®ã“ã¨ã¯ã¡ã‚ƒã‚“ã¨çŸ¥ã£ã¦ãŠã„ã¦ã»ã—ã‹ã£ãŸã‚Šã€è€ƒãˆã¦ã»ã—ã„。（切実） ビルドã¯Rubyã‹ã‚‰ã‚³ãƒžãƒ³ãƒ‰å®Ÿè¡Œã—ã¦ã‚‹ã‘ã©ã€å®Ÿéš›ã«ç™ºè¡Œã—ã¦ã„ã‚‹npm scriptã¯webpack(-dev-sever) --config config/webpack/(development|test|production).jsãªã‚“ã§è¦šãˆã¦ãŠã‘。 デフォルトã§multiple entryã«ãªã£ã¦ã„ã‚‹ã®ã§SplitChunksPluginã‹CommonsChunkPluginã®è¨å®šã¯ã¨ã‚Šã‚ãˆãšå…¥ã‚Œã¦ãŠã‘。 本当ã«webpackerã¯å¿…è¦ã§ã™ã‹ï¼Ÿæ™‚期ãŒæ¥ãŸã‚‰æ¨ã¦ã‚。 webpackerã®è½ã¨ã—ç©´ 昨今ã§ã¯å½“ãŸã‚Šå‰ã¨ãªã£ã¦ã„ã‚‹webpackã®å°Žå…¥ã‚’**webpackã‚’ã‚ã¾ã‚Šç†è§£ã—ã¦ã„ãªã„人ãŒç°¡å˜ã«å…¥ã‚Œã‚Œã‚‹ã¨ã„ã†ç‰¹å¾´ãŒã‚ã‚‹
David Heinemeier Hansson says No to Use of Rails Logo
Ruby Weekly is a weekly newsletter covering the latest Ruby and Rails news. (credit: yarrg) This morning, Pete Forde of Unspace prodded me to write about a new book, "Beginning Rails" by Jeffrey Allan Hardy and Cloves Carneiro Jr. (with Hampton Catlin). And, when I receive my copy from Apress, I will be reviewing it here. Of more immediate interest to me, however, was a note that David Heinemeier
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railsãƒãƒ¥ãƒ¼ãƒˆãƒªã‚¢ãƒ«ã‚’ãƒãƒ¼ã‚«ãƒ«ã§ç’°å¢ƒã‚’構築ã—ã¦ã‚„ã£ã¦ã„ã¾ã™ï¼Ž rails コマンドを使用ã™ã‚‹ã¨ï¼Œæ¯Žå›žï¼Œä¸‹è¨˜ã®WarningãŒå‡ºã¦ã—ã¾ã„ã¾ã™ï¼Ž WARRNINGメッセージã§æ¤œç´¢ã—ã¦ã¿ã¾ã—ãŸãŒï¼Œã©ã®ã‚ˆã†ã«å¯¾å‡¦ã™ã‚Œã°ã‚ˆã„ã®ã‹ã‚ã‹ã‚Šã¾ã›ã‚“ã§ã—ãŸï¼Ž ã©ã®ã‚ˆã†ã«å¯¾å‡¦ã™ã‚Œã°è‰¯ã„ã®ã§ã—ょã†ã‹ï¼Ÿ よã‚ã—ããŠé¡˜ã„ã—ã¾ã™ï¼Ž DEPRECATION WARNING Sprockets method `register_engine` is deprecated. Please register a mime type using `register_mime_type` then use `register_compressor` or `register_transformer`. https://github.com/rails/sprockets/blob/master/guides/extending
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æ—¢å˜ã®scopeã‹ã‚‰oræ¡ä»¶ã®SQLを組ã¿ç«‹ã¦ã‚‹ - Qiita
class User < ActiveRecord::Base scope :male, ->{ where(sex: :male) } # 男性 scope :female, ->{ where(sex: :female) } # 女性 scope :adult, ->{ where(arel_table[:age].gteq 20) } # æˆäºº scope :minor, ->{ where(arel_table[:age].lt 20) } # 未æˆå¹´ scope :men, ->{ adult.male } # æˆäºº,男性 scope :women, ->{ adult.female } # æˆäºº,女性 scope :boys, ->{ minor.male } # 未æˆå¹´,男性 scope :girls, ->{ minor.female } # 未æˆå¹´,女性 end User
Hybrid sweet spot: Native navigation, web content
When we launched the iPhone version of Basecamp in February of last year, it was after many rounds of experimentation on the architectural direction. The default route suggested by most when we got started back in early/mid-2012 was simple enough: Everything Be Native! This was a sensible recommendation, given the experiences people had in years prior with anything else. Facebook famously folded t
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fetchReplacement失敗時ã¯å†åº¦ãƒ¬ãƒ³ãƒ€ãƒªãƒ³ã‚°ã•ã‚Œ, landingã®çŠ¶æ…‹ã«ãªã‚‹ã€‚ よã出ã¦ãã‚‹ãŠã¾ã˜ãªã„ $(document).on 'ready page:load', -> ã“ã‚Œã¯jqueryãŒæä¾›ã™ã‚‹'ready'ã¨TurbolinksãŒæä¾›ã™ã‚‹'page:load'ã®ä¸¡æ–¹ã§å®šç¾©ã™ã‚‹ã“ã¨ã€‚ éžTurbolinksé·ç§»æ™‚ã¯'ready'ã§ç™ºç«ã€‚ Turbolinksé·ç§»æ™‚ã¯'page:load'ã§ç™ºç«ã®ä¸¡æ–¹ã‚’ã‚«ãƒãƒ¼ã™ã‚‹ã¨ã„ã†æ„味。 Turbolinksをサãƒãƒ¼ãƒˆã—ã¦ã„ãªã„ブラウザã§ã‚‚'ready'ãŒç™ºç«ã™ã‚‹ã®ã§å®‰å¿ƒã€‚ jquery-turbolinks gem 'ready'triggerã«page:loadã‚’è¿½åŠ ã—ã¦ãれる機能をæ供。 Trigger tips 通常ã€page:changeã§addEventListenerã—ã¦ã¯ã„ã‘ãªã„。 fetchHistoryã®éš›ã«
RSpec 3.5 ãŒãƒªãƒªãƒ¼ã‚¹ã•ã‚Œã¾ã—ãŸï¼
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Railsã®åŸºæœ¬ç†å¿µ : Railsã®ç”Ÿã¿ã®è¦ªãŒæŽ²ã’ã‚‹8ã¤ã®åŽŸå‰‡ | POSTD
(訳注: 2016/3/2ã€é ‚ã„ãŸãƒ•ã‚£ãƒ¼ãƒ‰ãƒãƒƒã‚¯ã‚’ã‚‚ã¨ã«è¨˜äº‹ã‚’ä¿®æ£ã„ãŸã—ã¾ã—ãŸã€‚) Ruby on Railsã¯æœ€è¿‘ã€æ€¥æ¿€ã«æ³¨ç›®ã‚’集ã‚ã¦ã„ã¾ã™ãŒã€ãã®åŽŸå› ã¯ã»ã¨ã‚“ã©ã€ã“ã®è¨€èªžãŒæ–¬æ–°ãªãƒ†ã‚¯ãƒŽãƒã‚¸ãƒ¼ã¨ã—ã¦ã‚‚ã¦ã¯ã‚„ã•ã‚ŒãŸã“ã¨ã¨ã€ã‚¿ã‚¤ãƒŸãƒ³ã‚°ã«ã‚ã‚Šã¾ã™ã€‚技術的ãªå„ªä½æ€§ã¯æ™‚é–“ã®çµŒéŽã¨ã¨ã‚‚ã«å¤±ã‚ã‚Œã¾ã™ã‹ã‚‰ã€ã‚¿ã‚¤ãƒŸãƒ³ã‚°ãŒã‚ˆã‹ã£ãŸã ã‘ã§ã¯ã€ä¸€éŽæ€§ã®ãƒ–ームã«çµ‚ã‚ã‚Šã€ã“ã®ãƒ ーブメントã®éš†ç››ã¯é•·ç¶šãã—ã¾ã›ã‚“。従ã£ã¦ã€ã€ŒRailsãŒã„ã‹ã«ã—ã¦ã€é©åˆ‡ãªæŠ€è¡“ã¨ã—ã¦ã®ä½ç½®ã‚’ç¶æŒã—続ã‘ã‚‹ã‚‹ã ã‘ã§ãªãã€å½±éŸ¿åŠ›ã¨ã‚³ãƒŸãƒ¥ãƒ‹ãƒ†ã‚£ã‚’拡大ã—続ã‘ã¦ããŸã®ã‹ã€ã‚’より多ãã®äººã«èª¬æ˜Žã—ã¦ã„ãå¿…è¦ãŒã‚ã‚Šã¾ã™ã€‚ãã—ã¦ã€ãã®ç¶æŒãƒ»æ‹¡å¤§ã‚’å¯èƒ½ã«ã—ãŸ/ã—ã¦ã„ãè¦å› ã¯ã€ç‰©è°ã‚’醸ã™ã“ã¨ã•ãˆã‚ã‚‹Railsã®åŸºæœ¬åŽŸå‰‡ã«ã‚ã‚‹ã¨è€ƒãˆã¦ã„ã¾ã™ã€‚ ã“ã®åŸºæœ¬åŽŸå‰‡ã¯ã“ã“10å¹´ã»ã©ã®é–“ã«é€²åŒ–を続ã‘ã¦ãã¾ã—ãŸãŒã€æœ€ã‚‚強固ãªæŸ±ã¨ãªã£ã¦ã„るルールã¯ã‚„ã¯ã‚Šã€å…¬é–‹å½“åˆã‹ã‚‰åˆ¶å®šã•ã‚Œã¦ã„
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Turbolinks 5 FAQ
GitHub - turbolinks/turbolinks: Turbolinks makes navigating your web application faster
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