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asa_ca3 id:asa_ca3

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Arel cheatsheet
users.where(users[:name].eq('amy')) # SELECT * FROM users WHERE users.name = 'amy' basic join In ActiveRecord (without Arel), if :photos is the name of the association, use joins users.joins(:photos) In Arel, if photos is defined as the Arel table, photos = Photo.arel_table users.join(photos) users.join(photos, Arel::Nodes::OuterJoin).on(users[:id].eq(photos[:user_id])) join with conditions users.
asa_ca3 2018/05/11
join

editor

table

activerecord

Arel
ãƒªãƒ³ã‚¯
Rails: SELECTã™ã‚‹ã‚«ãƒ©ãƒ ã‚’è¿½åŠ ã™ã‚‹scopeã‚’å®šç¾©ã™ã‚‹ | TECHSCORE BLOG | TECHSCORE BLOG
ã“ã‚“ã«ã¡ã¯ã€éˆ´æœ¨ã§ã™ã€‚ Rails ã§ SELECT ã™ã‚‹ã‚«ãƒ©ãƒ ã‚’è¿½åŠ ã™ã‚‹ scope ã‚’å®šç¾©ã™ã‚‹æ–¹æ³•ã‚’ã”ç´¹ä»‹ã—ã¾ã™ã€‚ ã‚„ã‚ŠãŸã„ã“ã¨ SELECT ã™ã‚‹ã‚«ãƒ©ãƒ ã‚’æŒ‡å®šã™ã‚‹ã«ã¯ã€ä»¥ä¸‹ã®ã‚ˆã†ã« select ãƒ¡ã‚½ãƒƒãƒ‰ã‚’ä½¿ç”¨ã—ã¾ã™ã€‚
asa_ca3 2018/03/14
ActiveRecord

rails

scope

ãƒ—ãƒã‚°ãƒ©ãƒŸãƒ³ã‚°
ãƒªãƒ³ã‚¯
ActiveRecordã®ã‚³ãƒ¼ãƒ«ãƒãƒƒã‚¯ã®é †åºãƒ»ã‚³ãƒ¼ãƒ«ãƒãƒƒã‚¯å†…ã®ãƒãƒ¼ãƒ«ãƒãƒƒã‚¯å‡¦ç†ã«ã¤ã„ã¦
ActiveRecordã®ã‚³ãƒ¼ãƒ«ãƒãƒƒã‚¯ãŒå®Ÿè¡Œã•ã‚Œã‚‹é †åºã€ãŠã‚ˆã³ãã‚Œã‚‰ã®ã‚¿ã‚¤ãƒŸãƒ³ã‚°ã§ã®ãƒãƒ¼ãƒ«ãƒãƒƒã‚¯ã™ã‚‹ãŸã‚ã®ã‚„ã‚Šæ–¹ã‚’ã¾ã¨ã‚ã¦ã¿ã¾ã—ãŸã€‚ Callback ã‚¿ã‚¤ãƒŸãƒ³ã‚°ã¾ãšã¯é †åºã«ã¤ã„ã¦ã€‚ä¸‹è¨˜ã®ã‚ˆã†ã«ãªã£ã¦ã„ã¾ã™ã€‚ before_validationafter_validationbefore_savebefore_create or before_updateafter_create or after_updateafter_saveafter_commitå®Ÿéš›ã«ã‚³ãƒ¼ãƒ‰ã§è©¦ã—ã¦ã¿ã‚‹ãã‚Œãžã‚Œã®ã‚³ãƒ¼ãƒ«ãƒãƒƒã‚¯ã‚’ã‚³ãƒ¼ãƒ‰ã§è©¦ã—ã¦ã¿ã‚‹ã€‚ã“ã‚“ãªã‚³ãƒ¼ãƒ«ãƒãƒƒã‚¯ã‚’è¨å®šã—ãŸUserãƒ¢ãƒ‡ãƒ«ã‚’ä½œã‚‹ã€‚ class User < ActiveRecord::Base before_validation -> { puts "before_validation is called" } after_validation ->
asa_ca3 2018/02/09
after

before

activerecord

Rails

callback
ãƒªãƒ³ã‚¯
è‚¥å¤§åŒ–ã—ãŸActiveRecordãƒ¢ãƒ‡ãƒ«ã‚’ãƒªãƒ•ã‚¡ã‚¯ã‚¿ãƒªãƒ³ã‚°ã™ã‚‹7ã¤ã®æ–¹æ³•ï¼ˆç¿»è¨³ï¼‰
æ›´æ–°æƒ…å ±: 2013/11/19: åˆç‰ˆå…¬é–‹ 2021/01/08: è¨³æ–‡è¦‹ç›´ã—ã€è¿½è¨˜ ã“ã‚“ã«ã¡ã¯ã€hachi8833ã§ã™ã€‚ä»Šå›žã¯ã€è‡ªåˆ†ãŒçŸ¥ã‚ŠãŸã‹ã£ãŸã€Active Recordãƒ¢ãƒ‡ãƒ«ã®ãƒªãƒ•ã‚¡ã‚¯ã‚¿ãƒªãƒ³ã‚°ã«é–¢ã™ã‚‹è¨˜äº‹ã‚’ç¿»è¨³ã„ãŸã—ã¾ã—ãŸã€‚1å¹´å‰ã®è¨˜äº‹ãªã®ã§Rails 3ãŒå‰æã§ã™ãŒã€Rails 4ä»¥é™ã§ã‚‚åŸºæœ¬çš„ã«ã¯å¤‰ã‚ã‚‰ãªã„ã¨æ€ã„ã¾ã™ã€‚ãƒªãƒ³ã‚¯ã¯å¯èƒ½ãªã‚‚ã®ã«ã¤ã„ã¦ã¯æ—¥æœ¬èªžã®ã‚‚ã®ã«ç½®ãæ›ãˆã¦ã„ã¾ã™ã€‚ ãªãŠã€ã“ã“ã§ã”ç´¹ä»‹ã—ãŸã‚ªãƒ–ã‚¸ã‚§ã‚¯ãƒˆã¯ã€appä»¥ä¸‹ã«ãã‚Œãžã‚Œä»¥ä¸‹ã®ã‚ˆã†ã«ãƒ•ã‚©ãƒ«ãƒ€ã‚’è¿½åŠ ã—ã¦ãã“ã«é…ç½®ã—ã¾ã™ã€‚ æ³¨è¨˜: ä»¥ä¸‹ã¯ä½¿ã‚ã‚Œãã†ãªãƒ•ã‚©ãƒ«ãƒ€ã‚’åˆ—æŒ™ã—ãŸã ã‘ã§ã‚ã‚Šã€å®Ÿéš›ã«ã¯ã“ã®ä¸€éƒ¨ã—ã‹ä½¿ã„ã¾ã›ã‚“ã€‚ Value Object Service Object Form Object Query Object View Object Policy Object Decorator âš“ è‚¥å¤§åŒ–ã—ãŸActive
asa_ca3 2017/11/07
activerecord

code

OOP

rails

ãƒªãƒ•ã‚¡ã‚¯ã‚¿ãƒªãƒ³ã‚°

ruby
ãƒªãƒ³ã‚¯
http://post.simplie.jp/posts/32
asa_ca3 2017/09/07
development

activerecord

rails

ãƒªãƒ•ã‚¡ã‚¯ã‚¿ãƒªãƒ³ã‚°

refactoring
ãƒªãƒ³ã‚¯
Rails4.2ã‹ã‚‰Rails5.0(RC1)ã«ç§»è¡Œã™ã‚‹éš›ã«ä¿®æ£ã—ãŸãƒã‚¤ãƒ³ãƒˆ - ã±ã‚ã£ã¨ãƒ»ã™ãŸã˜ãŠ
æ˜¨å¹´ã®ç§‹ã‚ãŸã‚Šã‹ã‚‰ã€ãŠä»•äº‹ã®é–¢ä¿‚ã§ç›£è¦–ã—ã¦ã„ãŸRailsã®é–‹ç™ºçŠ¶æ³ã§ã™ãŒã€ ãŠä»•äº‹ãŒé–¢ä¿‚ãªããªã£ã¦ã‚‚ã€ãªã‚“ã¨ãªãæ¯Žæ—¥ãƒã‚§ãƒƒã‚¯ã—ã¦ãŠã‚Šã¾ã—ã¦ ã©ã†ã—ã¦ã‚‚Î²ã‚’æŽ¡ç”¨ã™ã‚‹ã®ã¯æ€–ã„ã®ã§ã€ï¼ˆä»•æ§˜ãŒå›ºã¾ã‚‹ï¼‰RCç‰ˆã‚’å¾…ã£ã¦ã„ãŸã¨ã“ã‚ã€ å…ˆæ—¥RCç‰ˆãŒãƒªãƒªãƒ¼ã‚¹ã•ã‚Œã¾ã—ãŸ(`ï½¥Ï‰ï½¥Â´) Riding Rails: This Week In Rails ðŸ’¯: RailsConf recap & Rails 5.0 RC 1 is out! ã¨ã„ã†ã“ã¨ã§ã€æ‰‹æŒã¡ã®ã€Œãƒã‚§ãƒ³ã‚¯ãƒãƒ‘ãƒ¼ãƒ†ã‚£ãƒ¼ã‚·ãƒŸãƒ¥ãƒ¬ãƒ¼ã‚¿ãƒ¼ã€ã‚’ã€ Rails4.2ã‹ã‚‰Rails5.0RC1ã«ç§»è¡Œã—ãŸã‚ã‘ã§ã™ ccpts.parrot-studio.com ç§»è¡Œã™ã‚‹éš›ã«æ›¸ãæ›ãˆãŸã‚³ãƒ¼ãƒ‰ãŒã“ã‚Œã«ãªã‚Šã¾ã™ãŒãƒ»ãƒ»ãƒ» Rails5(RC1)ã«ç§»è¡Œ / å…¥æ‰‹å…ˆæ¤œç´¢ã®ãƒã‚°ã‚’ä¿®æ£ / viewã®ã‚³ãƒ¼ãƒ‰ã‚’ä¿®æ£ / ãƒ‡ãƒ¼ã‚¿ã®èª¤ã‚Šã‚’ä¿®æ£ Â· parrot-studio/cc-
asa_ca3 2017/08/16
activerecord

Arel

rails

rails5

config

ActiveRecord

Model
ãƒªãƒ³ã‚¯
ã€ãƒ¡ãƒ¢ã€‘ActiveRecordQueryã§è¤‡æ•°ã®ãƒ†ãƒ¼ãƒ–ãƒ«ã‚’JOINã™ã‚‹æ–¹æ³• : ã‚³ãƒ¼ãƒ’ãƒ¼ã¨æœ¬ã¨ç”˜ã„ã‚‚ã®
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asa_ca3 2017/08/08
activerecord

rails
ãƒªãƒ³ã‚¯
Ruby (on Rails) ã§ä½¿ãˆã‚‹ enumeration å®Ÿè£…ã‚’æ¯”è¼ƒã—ã¦ã¿ãŸ
ã“ã‚“ã«ã¡ã¯ã€GMO ãƒšãƒ‘ãƒœã®äººé–“ã§ã™ã€‚ã“ã‚Œã¯ pepabo Advent Calendar 2016 ã® 9 æ—¥ç›®ã®è¨˜äº‹ã§ã™ã€‚ æ˜¨æ—¥ã¯æˆ‘ã‚‰ãŒ CTL ã‘ã‚“ã¡ã‚ƒã‚“ãã‚“ã•ã‚“ã® ã€Œgemãƒ“ãƒ«ãƒ‰ã—ã‚ˆã†ã¨ã—ã¦ The validation error was 'yourgem-x.y.z contains itself (yourgem-x.y.z.gem), check your files list ã¨å‡ºãŸã¨ãã€ ã§ã—ãŸã€‚ ä»Šæ—¥ã¯ Ruby, ã¨ãã« Rails ã§ä½¿ãˆã‚‹ enumeration å®Ÿè£… Enumerize ActiveRecord::Enum ã®æ©Ÿèƒ½ã‚’æ¯”è¼ƒã—ã¦ã¿ã¾ã—ãŸã€‚ å‹•æ©Ÿ ç§äº‹ãªãŒã‚‰ã€ä»•äº‹ã§ Rails ã‚¢ãƒ—ãƒªã‚±ãƒ¼ã‚·ãƒ§ãƒ³ã®é–‹ç™ºã‚’ã™ã‚‹ã‚ˆã†ã«ãªã£ã¦ 1 ã‹æœˆçµŒã¡ã¾ã—ãŸã€‚ ã‚³ãƒ¼ãƒ‰ã‚’èªã‚“ã§ã„ã‚‹ã¨ã„ã‚ã„ã‚ã¨å‹‰å¼·ã«ãªã‚‹ã“ã¨ãŒå¤šã„ã®ã§ã™ãŒã€Enumerize ã¨ã„ã† enumeration
asa_ca3 2017/06/13
gem

enum

activerecord

active

rails

enumerize

ActiveRecord
ãƒªãƒ³ã‚¯
Rails 5 ã® or ã‚’è‰²ã€…è©¦ã—ã¦ã¿ãŸ - Qiita
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asa_ca3 2017/06/11
activerecord

Model

Rails

record

active

or

ActiveRecord

Qiita
ãƒªãƒ³ã‚¯
ActiveHashã‚’ä½¿ã£ã¦Railsã§åŒºåˆ†å€¤ã‚’æ‰±ã†æ–¹æ³• | Webã‚·ã‚¹ãƒ†ãƒ é–‹ç™ºï¼æ•™è‚²ã‚½ãƒªãƒ¥ãƒ¼ã‚·ãƒ§ãƒ³ã®ã‚¿ã‚¤ãƒ ã‚¤ãƒ³ã‚¿ãƒ¼ãƒ¡ãƒ‡ã‚£ã‚¢
Railsã§ã®åŒºåˆ†å€¤ã®æ‰±ã„ã«ã¤ã„ã¦è€ƒãˆã‚‹ ã®ç¶šãã§ã™ã€‚ åŒºåˆ†å€¤æƒ…å ±ã‚’DBã«ä¿å˜ã—ã¦ãŠãã‹ã€ã‚¢ãƒ—ãƒªã«ã®ã¿ä¿å˜ã—ã¦ãŠãã®ã‹ã€æ‚©ã¾ã—ã„æ‰€ã§ã™ã€‚ DBã«åŒºåˆ†å€¤ã‚’ä¿å˜ã—ã¦ãŠãã¨ã€ActiveRecordãªã‚ªãƒ–ã‚¸ã‚§ã‚¯ãƒˆã«ãªã£ã¦æ‰±ã„ã‚„ã™ã„ã¨ã„ã†åˆ©ç‚¹ãŒã‚ã‚Šã¾ã™ã€‚ ã—ã‹ã—ã€DBã«ã‚‚ã‚¢ãƒ—ãƒªã«ã‚‚åŒºåˆ†å€¤ã®æƒ…å ±(ProductTypeã®1ã¯LADIESã§ã‚ã‚‹ã¨ã„ã£ãŸæƒ…å ±ï¼‰ã‚’æŒã¤äº‹ã«ãªã‚Šã€äºŒé‡ç®¡ç†ã®çŠ¶æ…‹ã¨ãªã‚‹å¯èƒ½æ€§ãŒã‚ã‚Šã¾ã™ã€‚ ä¸€ã‚«æ‰€å¤‰ãˆãŸã‚‰å¯¾ã«ãªã‚‹ã‚‚ã†ä¸€æ–¹ã®ä¿®æ£ã‚‚ã—ãªã„ã¨ã„ã‘ãªã„ã€ã¨ã„ã†çŠ¶æ…‹ã¯ã€ã‚·ã‚¹ãƒ†ãƒ ä¿å®ˆã®è¦³ç‚¹ã‹ã‚‰ã¯ã‚ˆã‚ã—ãã‚ã‚Šã¾ã›ã‚“ã€‚ ç§ã¯éŽåŽ»ã«ã‚¢ãƒ—ãƒªå´ã«åŒºåˆ†å€¤æƒ…å ±ã‚’æ›´æ–°ã—ãŸã®ã«ã€DBå´ã«åŒºåˆ†å€¤æƒ…å ±ã‚’å…¥ã‚Œå¿˜ã‚Œã¦ã„ãŸ! ã¨ã„ã†å¤±æ•—ã‚’ä½“é¨“ã—ã¾ã—ãŸã€‚ åŒºåˆ†å€¤æƒ…å ±ã‚’ã‚¢ãƒ—ãƒªã€DBä¸¡æ–¹ã«æŒã£ã¦ã‚‹ã®ã¯ã‚„ã‚ãŸã„ã€‚ã§ã‚‚ActiveRecordãƒ©ã‚¤ã‚¯ãªã‚ªãƒ–ã‚¸ã‚§ã‚¯ãƒˆã§åŒºåˆ†å€¤ã‚’æ‰±ã„ãŸã„ã€‚ ActiveRecordã®ãƒ‡ãƒ¼ã‚¿ã‚½ãƒ¼ã‚¹ãŒcla
asa_ca3 2017/06/02
alias

activerecord

active_hash

ruby
ãƒªãƒ³ã‚¯
rails consoleä¸Šã§ã®SQLè¡¨ç¤ºã‚’ãƒ‡ãƒ•ã‚©ãƒ«ãƒˆã« - ç¶™ç¶šçš„ãƒ–ãƒã‚°
rails consoleã§ã€ã©ã‚“ãªSQLãŒç™ºè¡Œã•ã‚Œã¦ã„ã‚‹ã‹ãã®å ´ã§ç¢ºèªã—ãŸã„ logã‚’ã¿ã‚Œã°ç¢ºèªã§ãã¾ã™ãŒã€é¢å€’ãã•ã„ã§ã™ã‚ˆãã€‚ rails consoleã§ä¸‹è¨˜ã‚³ãƒžãƒ³ãƒ‰ã‚’æ‰“ã¦ã°OKã§ã™ï¼ ActiveRecordã®ãƒã‚°ã®å‡ºåŠ›å…ˆã‚’æ¨™æº–å‡ºåŠ›ã«å¤‰æ›´ã™ã‚‹ã“ã¨ãŒå‡ºæ¥ã¾ã™ã€‚ ActiveRecord::Base.logger = Logger.new(STDOUT) æ¯Žå›žæ‰“ã¤ã®é¢å€’ã ã—ã€æ¯Žå›žå¿˜ã‚Œã¦æ¤œç´¢ã—ã¦ã‚‹ã—ã€ã‚‚ã†ãƒ‡ãƒ•ã‚©ãƒ«ãƒˆã«ã—ãŸã„ ä½•å›žã‹ä½¿ã£ã¦ã‚‹ã¨ã“ã‚“ãªã“ã¨ã«ãªã£ã¦ãã¾ã™ã€‚ ãã‚“ãªäººã¯ãƒ‡ãƒ•ã‚©ãƒ«ãƒˆã«ã—ã¦ã—ã¾ã„ã¾ã—ã‚‡ã†ï¼ è‡ªåˆ†ã¯Pryã‚’ä½¿ã£ã¦ã„ã‚‹ã®ã§ã€~/.pryrcã«ä¸‹è¨˜è¿½åŠ ã€‚ irbã®äººã¯ã€~/.irbrcã§ã„ã„ã¨æ€ã„ã¾ã™ã€‚ if defined?(Rails::Console) ActiveRecord::Base.logger = Logger.new(STDOUT) end å‚è€ƒ Disp
asa_ca3 2017/05/30
rails

activerecord
ãƒªãƒ³ã‚¯
Railsã®è¤‡é›‘ãªæ¤œç´¢ã¯ã‚¹ã‚³ãƒ¼ãƒ—ã‚’ä½¿ãŠã† - Qiita
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asa_ca3 2017/05/26
activerecord

Model

rails

scope

Ruby

arel
ãƒªãƒ³ã‚¯
Rails ã® ActiveRecord ãƒ¢ãƒ‡ãƒ«ãƒ†ã‚¹ãƒˆã®æ›¸ãæ–¹ã‚¬ã‚¤ãƒ‰ãƒ©ã‚¤ãƒ³ - passingloopã®æ—¥è¨˜
ã“ã®ã‚¨ãƒ³ãƒˆãƒªã§ã¯ï¼ŒRuby on Rails ï¼ˆä»¥ä¸‹ Railsï¼‰ã® ActiveRecord ãƒ¢ãƒ‡ãƒ«ãƒ†ã‚¹ãƒˆã«ã¤ã„ã¦ï¼Œ1) ã©ã“ã®ä½•ã‚’ãƒ†ã‚¹ãƒˆã™ã‚Œã°ã‚ˆã„ã‹ï¼Œ2) ã©ã®ã‚ˆã†ã«ãƒ†ã‚¹ãƒˆã‚’æ›¸ã‘ã°ã‚ˆã„ã‹ï¼Œã®ã‚¬ã‚¤ãƒ‰ãƒ©ã‚¤ãƒ³ã‚’ç¤ºã—ã¾ã™ï¼Žã“ã®ã‚¬ã‚¤ãƒ‰ãƒ©ã‚¤ãƒ³ã¯ Rails å…¬å¼ã®ã‚‚ã®ã§ã¯ãªãï¼Œid:passingloop ãŒä½¿ã£ã¦ã„ã‚‹ç§çš„ãªã‚‚ã®ã§ã™ï¼Žç–‘å•ãƒ»è³ªå•ãƒ»æ‰¹åˆ¤ãƒ»é–“é•ã„ã®æŒ‡æ‘˜ã¯ãƒšãƒ¼ã‚¸ä¸‹éƒ¨ã®ã‚³ãƒ¡ãƒ³ãƒˆæ¬„ã¾ã§ãŠé¡˜ã„ã—ã¾ã™ï¼Ž ã¯ã˜ã‚ã« Rails ã¯ TDD/BDD ã‚µãƒãƒ¼ãƒˆãŒå……å®Ÿã—ãŸ Web ã‚¢ãƒ—ãƒªã‚±ãƒ¼ã‚·ãƒ§ãƒ³é–‹ç™ºãƒ•ãƒ¬ãƒ¼ãƒ ãƒ¯ãƒ¼ã‚¯ã§ã™ï¼ŽRails ã§ä½¿ãˆã‚‹ Test::Unit ã‚„ RSpec ãªã©ã¨ã„ã£ãŸãƒ†ã‚¹ãƒ†ã‚£ãƒ³ã‚°ãƒ•ãƒ¬ãƒ¼ãƒ ãƒ¯ãƒ¼ã‚¯ã®ä½¿ã„æ–¹ã«é–¢ã™ã‚‹è§£èª¬ã‚‚è±Šå¯Œã«ã‚ã‚Šã¾ã™ï¼Žã—ã‹ã—ï¼Œã€Œã©ã“ã‚’ã©ã†ãƒ†ã‚¹ãƒˆã™ã‚Œã°ã‚ˆã„ã®ã‹ã€ã«ã¤ã„ã¦ã®è§£èª¬ã¯ï¼Œã€Œä½¿ã„æ–¹ã€ã®è§£èª¬ã¨æ¯”è¼ƒã—ã¦å°‘ãªã„ã‚ˆã†ã«æ€ã„ã¾ã™ï¼Žã‚‚ã£ã¨ã‚‚ï¼Œãƒ†ã‚¹ãƒˆä¸€èˆ¬ã«ã¤ã„ã¦ã©ã†æ›¸ãã‹ã¯ã‚¢ãƒ—
asa_ca3 2017/05/26
activerecord

rails

test

Ruby

tdd

rspec

factory_girl
ãƒªãƒ³ã‚¯
ActiveRecordã®joinsã¨preloadã¨includesã¨eager_loadã®é•ã„ - Qiita
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asa_ca3 2017/05/26
join

activerecord

association

db

development

rails

ruby

joins

includes
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