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aki77 id:aki77

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Active Recordã¨ã‚‚ã£ã¨ä»²è‰¯ããªã£ã¦è‡ªç„¶ã«å„ªã—ã„ã‚³ãƒ¼ãƒ‰ã‚’æ›¸ããž - SmartHR Tech Blog
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aki77 2021/11/12
rails

activerecord
ãƒªãƒ³ã‚¯
ActiveRecordã®includes, preload, eager_load ã®å€‹äººçš„ãªä½¿ã„åˆ†ã‘ - Money Forward Developers Blog
ãƒžãƒãƒ¼ãƒ•ã‚©ãƒ¯ãƒ¼ãƒ‰ç¦å²¡æ‹ ç‚¹ã®è²¬ä»»è€…ã‚’ã—ã¦ãŠã‚Šã¾ã™ é»’ç”° ã§ã™ã€‚ æ™®æ®µã¯Rails ã‚¨ãƒ³ã‚¸ãƒ‹ã‚¢ã¨ã—ã¦ ãƒžãƒãƒ¼ãƒ•ã‚©ãƒ¯ãƒ¼ãƒ‰ã‚¯ãƒ©ã‚¦ãƒ‰çµŒè²» ã®é–‹ç™ºã‚’æ‹…å½“ã—ã¦ã„ã¾ã™ã€‚ æ™®æ®µRailsã‚’ä½¿ã£ã¦é–‹ç™ºã•ã‚Œã¦ã„ã‚‹æ–¹ã§ã‚ã‚Œã°ã€N+1å•é¡Œã«æ‚©ã¾ã•ã‚ŒãŸçµŒé¨“ã¯å¤§æŠµã®æ–¹ãŒãŠã‚ã‚Šã§ã¯ãªã„ã§ã—ã‚‡ã†ã‹ã€‚ N+1ãªã‚¯ã‚¨ãƒªã®ç™ºè¦‹ã«ã¯ bullet ã‚’ä½¿ã†ã¨è‰¯ã„ã§ã™ãã€‚ bulletã‚’ä½¿ã†ã¨N+1ãªã‚¯ã‚¨ãƒªã‚’ç™ºè¦‹ã—ã¦ãã‚Œã€ã•ã‚‰ã«ã€å…·ä½“çš„ã«ã“ã“ã«includesã‚’è¿½åŠ ã—ãªã•ã„ã¨æŒ‡æ‘˜ã¾ã§ã—ã¦ãã‚Œã‚‹ã®ã§å¤§å¤‰åŠ©ã‹ã‚Šã¾ã™ã€‚ ã—ã‹ã—ã€å…ˆæ—¥bulletã«è¨€ã‚ã‚Œã‚‹ãŒã¾ã¾ã«includesã‚’ä»˜ã‘ã¦ã¿ãŸã¨ã“ã‚ã€N+1ã¯è§£æ¶ˆã—ãŸã‚‚ã®ã®ã€ã‚¹ãƒãƒ¼ã‚¯ã‚¨ãƒªã«è¦‹èˆžã‚ã‚Œã‚‹ã“ã¨ã¨ãªã£ãŸã®ã§ã€includes,preload, eager_loadã«ã¤ã„ã¦æ”¹ã‚ã¦èª¿ã¹ã¦ã¾ã¨ã‚ã¦ã¿ã‚‹ã“ã¨ã«ã—ã¾ã—ãŸã€‚ ï¼ˆã‚½ãƒ¼ã‚¹èª¿æŸ»ã—ãŸRailsã®ãƒãƒ¼ã‚¸ãƒ§ãƒ³ã¯ 6.0.0.beta3 ã§ã™ã€‚ï¼‰ i
aki77 2019/04/02
activerecord

rails
ãƒªãƒ³ã‚¯
Active Record and PostgreSQL â€” Ruby on Rails Guides
This guide covers PostgreSQL specific usage of Active Record. After reading this guide, you will know: How to use PostgreSQL's datatypes. How to use UUID primary keys. How to include non-key columns in indexes. How to use deferrable foreign keys. How to use unique constraints. How to implement exclusion constraints. How to implement full text search with PostgreSQL. How to back your Active Record
aki77 2018/06/05
rails

activerecord

postgresql
ãƒªãƒ³ã‚¯
ActiveRecordã§INã®ä¸ãŒä¸€ä¸‡å€‹ã¨ã‹ã«ãªã‚‰ãªã„ã‚ˆã†ã«ã™ã‚‹ - ã‹ã¿ã½ã‚ãƒ¼ã‚‹
ã“ã®è¨˜äº‹ã¯ MySQL Casual Advent Calendar 2017 ã®23æ—¥ç›®ã®è¨˜äº‹ã§ã™ã€‚ ã¿ãªã•ã‚“ORãƒžãƒƒãƒ‘ãƒ¼ã¯ä½¿ã£ã¦ã„ã¾ã™ã‹ï¼Ÿ åƒ•ã¯ä»•äº‹ã¨ã‹è¶£å‘³ã§ActiveRecordã¨ã„ã†ORãƒžãƒƒãƒ‘ãƒ¼ã‚’ä½¿ã£ã¦ã„ã‚‹ã‚“ã§ã™ã‘ã©ã€ã“ã„ã¤ä¾‹ãˆã° Team.preload(players: :high_score).to_a ã¿ãŸã„ãªã“ã¨ã‚’ã™ã‚‹ã¨ã™ã SELECT `scores`.* FROM `scores` FROM `scores`.`id` IN (a, b, c, ...æ•°åƒå€‹ç¶šã...) ã¿ãŸã„ãªã‚¯ã‚¨ãƒªã‚’ç”Ÿæˆã—ã‚ˆã‚‹ã‚“ã§ã™ã‘ã©ã€MySQL 5.7ã«ä¸Šã’ãŸã¨ãã« range_optimizer_max_mem_size ã®åˆ¶é™ã§å®Ÿè¡Œè¨ˆç”»ãŒãƒ†ãƒ¼ãƒ–ãƒ«ã‚¹ã‚ãƒ£ãƒ³ã«è½ã¡ã¦ãˆã‚‰ã„ç›®ã«ã‚ã£ãŸã“ã¨ãŒã‚ã‚Šã¾ã—ãŸã€‚MySQLå´ã§ range_optimizer_max_mem_size = 0 ã™ã‚‹ã“ã¨ã§
aki77 2018/01/31
activerecord

rails

mysql
ãƒªãƒ³ã‚¯
Rein: Railsã®ActiveRecordã§DBåˆ¶ç´„ã‚„ãƒ‡ãƒ¼ã‚¿ãƒ™ãƒ¼ã‚¹ãƒ“ãƒ¥ãƒ¼ã‚’ä½¿ãˆã‚‹gemï¼ˆREADMEç¿»è¨³ï¼‰ï½œTechRacho by BPSæ ªå¼ä¼šç¤¾
2017.09.11 Rein: Railsã®ActiveRecordã§DBåˆ¶ç´„ã‚„ãƒ‡ãƒ¼ã‚¿ãƒ™ãƒ¼ã‚¹ãƒ“ãƒ¥ãƒ¼ã‚’ä½¿ãˆã‚‹gemï¼ˆREADMEç¿»è¨³ï¼‰ ã“ã‚“ã«ã¡ã¯ã€hachi8833ã§ã™ã€‚ä»Šå›žã¯Railsã‚¦ã‚©ãƒƒãƒã§ã‚‚ã”ç´¹ä»‹ã—ãŸRein gemã®READMEç¿»è¨³ã‚’ãŠé€ã‚Šã—ã¾ã™ã€‚ å¤šãã®æ©Ÿèƒ½ãŒPostgreSQLå¯„ã‚Šãªã®ã§ã€PostgreSQLã§ä½¿ã†ã¨ã•ã‚‰ã«å¹¸ã›ã«ãªã‚Œã‚‹ã‹ã‚‚ã—ã‚Œã¾ã›ã‚“ã€‚ æ¦‚è¦ READMEæœ«å°¾ã®MITãƒ©ã‚¤ã‚»ãƒ³ã‚¹ãŠã‚ˆã³ãƒªãƒã‚¸ãƒˆãƒªã®ãƒ©ã‚¤ã‚»ãƒ³ã‚¹ã«åŸºã¥ãç¿»è¨³ãƒ»å…¬é–‹ã„ãŸã—ã¾ã™ã€‚ è‹±èªžREADME: rein æ›´æ–°æ—¥: 2017/06/06 è‘—è€…: Joshua Bassett ã‚µã‚¤ãƒˆ: https://joshbassett.info/ Rein: Railsã®ActiveRecordã«DBåˆ¶ç´„ã‚’è¿½åŠ ã™ã‚‹gemï¼ˆREADMEç¿»è¨³ï¼‰ ãƒ‡ãƒ¼ã‚¿å®Œå…¨æ€§ï¼ˆdata integrityï¼‰ã¯ã‚ˆã„ã‚‚ã®ã§ã™ã€‚ å€¤ã®åˆ¶ç´„ã¯
aki77 2017/09/11
rails

activerecord

postgresql
ãƒªãƒ³ã‚¯
[Rails 5] ãƒžã‚¤ã‚°ãƒ¬ãƒ¼ã‚·ãƒ§ãƒ³æ™‚ã«ãƒ‡ãƒ¼ã‚¿ãƒ™ãƒ¼ã‚¹ã®ã‚«ãƒ©ãƒ ã«ã‚³ãƒ¡ãƒ³ãƒˆã‚’è¿½åŠ ã™ã‚‹ï½œTechRacho by BPSæ ªå¼ä¼šç¤¾
ã“ã‚“ã«ã¡ã¯ã€hachi8833ã§ã™ã€‚BigBinaryã‚·ãƒªãƒ¼ã‚ºã§å¼•ãç¶šãRails 5ã®æ©Ÿèƒ½ã‚’ç´¹ä»‹ã„ãŸã—ã¾ã™ã€‚ãƒ‡ãƒ¼ã‚¿ãƒ™ãƒ¼ã‚¹ã®ã‚«ãƒ©ãƒ å®šç¾©ã®èª¬æ˜Žã‚’ã‚³ãƒ¡ãƒ³ãƒˆã§æ›¸ã‘ã‚‹ã“ã®æ©Ÿèƒ½ã¯ã€ä¸€è¦‹åœ°å‘³ãªãŒã‚‰å½¹ã«ç«‹ã¡ãã†ã§ã™ã€‚ å…ƒè¨˜äº‹ Rails 5 supports adding comments in migrationsï¼ˆç±³å›½BigBinaryç¤¾ã®ãƒ–ãƒã‚°ã‚ˆã‚Šï¼‰ ç¢ºèªã«ä½¿ã£ãŸç’°å¢ƒ Rails 5ãƒãƒ¼ã‚¸ãƒ§ãƒ³: 5.0.1ï¼ˆ5-0-stableï¼‰ Rubyãƒãƒ¼ã‚¸ãƒ§ãƒ³: 2.4.0p0 PostgreSQL 9.6.1 Rails 5ã§ã¯ãƒžã‚¤ã‚°ãƒ¬ãƒ¼ã‚·ãƒ§ãƒ³æ™‚ã«ã‚³ãƒ¡ãƒ³ãƒˆã‚’ã‚«ãƒ©ãƒ ã«è¿½åŠ ã§ãã‚‹ã‚ˆã†ã«ãªã£ãŸ Rails 4ä»¥å‰ã¯ã€ãƒ‡ãƒ¼ã‚¿ãƒ™ãƒ¼ã‚¹ã®ã‚«ãƒ©ãƒ ã«ã‚³ãƒ¡ãƒ³ãƒˆã‚’è¿½åŠ ã™ã‚‹ã®ã«ä»¥ä¸‹ã®ã‚ˆã†ãªgemãŒå¿…è¦ã§ã—ãŸã€‚ pinnymz/migration_comments PostgreSQLã€MySQLã€SQLiteãŒå¯¾è±¡ Active
aki77 2017/05/13
activerecord

rails
ãƒªãƒ³ã‚¯
Rails 5ã«å…¥ã£ãŸDBç ´å£Šç³»taskã®é˜²æ¢å‡¦ç†ã«ã¤ã„ã¦
Rails 5ã‹ã‚‰ã€production environmentã§ã®DBç ´å£Šç³»ã®taskã®å®Ÿè¡Œã‚’é˜²æ¢ã™ã‚‹ä»•çµ„ã¿ãŒå…¥ã‚Šã¾ã—ãŸã€‚ ä¾‹ãˆã°ã€production environmentã§db:dropã‚’å®Ÿè¡Œã—ã‚ˆã†ã¨ã™ã‚‹ã¨ã€ä¸‹è¨˜ã®ã‚ˆã†ãªã‚¨ãƒ©ãƒ¼(ActiveRecord::ProtectedEnvironmentError)ãŒç™ºç”Ÿã—ã¾ã™ã€‚ $ RAILS_ENV=production ./bin/rails db:drop rails aborted! ActiveRecord::ProtectedEnvironmentError: You are attempting to run a destructive action against your 'production' database If you are sure you want to continue, run the same co
aki77 2016/08/23
rails

activerecord
ãƒªãƒ³ã‚¯
Railsã§N+1 countã‚¯ã‚¨ãƒªã‚’æ½°ã™activerecord-precountã‚’ä½œã£ãŸ - k0kubun's blog
è¿½è¨˜: 2017/09/06 å°‘ã—APIãŒå†—é•·ãªã‚‚ã®ã®ActiveRecordã¸ã®ãƒ¢ãƒ³ã‚ãƒ¼ãƒ‘ãƒƒãƒãŒå°‘ãªã„ãƒãƒ¼ã‚¸ãƒ§ãƒ³ activerecord-precounter ã¨ã„ã†ã®ã‚’ä½œã‚Šã¾ã—ãŸã€‚ã“ã¡ã‚‰ã®æ–¹ãŒãƒã‚°ã‚Šã«ãã„ã¯ãšãªã®ã§ã€ç¾åœ¨ã¯activerecord-precounterã®æ–¹ã‚’ä½¿ã†ã“ã¨ãŒæŽ¨å¥¨ã•ã‚Œã¾ã™ã€‚ github.com æ¦‚è¦ N+1 countã‚¯ã‚¨ãƒªã‚’æœ€å¤§11.7å€é€Ÿãã§ãã‚‹activerecord-precountã¨ã„ã†gemã‚’ä½œã£ãŸã€‚ *1 k0kubun/activerecord-precount N+1 countã‚¯ã‚¨ãƒª Tweet.all.each do |tweet| p tweet.favorites.count end # SELECT `tweets`.* FROM `tweets` # SELECT COUNT(*) FROM `favorites` WHERE
aki77 2016/08/16
activerecord

gem

rails
ãƒªãƒ³ã‚¯
rake db:reset ã¨ rake db:migrate:reset ã®é•ã„
rake db:reset ã¨ rake db:migrate:reset ã¯ã©ã¡ã‚‰ã‚‚ä¸€æ—¦å…¨ã¦ã® DB ã‚’ dropï¼ˆå‰Šé™¤ï¼‰ã—ãŸå¾Œã« DB ä½œæˆã—ç›´ã™ã‚³ãƒžãƒ³ãƒ‰ã§ã™ãŒã€æ˜Žç¢ºãªé•ã„ãŒã‚ã‚Šã¾ã™ã€‚Ruby on Rails ãƒãƒ¥ãƒ¼ãƒˆãƒªã‚¢ãƒ«ï¼šå®Ÿä¾‹ã‚’ä½¿ã£ã¦ Rails ã‚’å¦ã¼ã†ã§ã¯ã€rake db:reset ã—ã‹å‡ºã¦ã“ãªã„ã®ã§ã™ãŒã€rake db:migrate:reset ã‚‚çŸ¥ã£ã¦ã„ã‚‹ã¨çŠ¶æ³æ¬¡ç¬¬ã§ã¨ã¦ã‚‚ä¾¿åˆ©ã§ã™ã€‚ã¨ã„ã†ã‹ã€ç§ã¯ã‚€ã—ã‚ã“ã¡ã‚‰ã‚’å¤šç”¨ã—ã¦ã„ã¾ã™ã€‚
aki77 2016/06/21
rails

activerecord
ãƒªãƒ³ã‚¯
Rails 5 adds OR support in Active Record
Rails 5 has added OR method to Active Relation for generating queries with OR clause. 1 2>> Post.where(id: 1).or(Post.where(title: 'Learn Rails')) 3 SELECT "posts".* FROM "posts" WHERE ("posts"."id" = ? OR "posts"."title" = ?) [["id", 1], ["title", "Learn Rails"]] 4 5=> <ActiveRecord::Relation [#<Post id: 1, title: 'Rails'>]> 6 Copy This returns ActiveRecord::Relation object, which is logical unio
aki77 2016/06/12
activerecord

rails
ãƒªãƒ³ã‚¯
ActiveRecordã®enumã§æ°—ã‚’ã¤ã‘ãŸã„ï¼“ã¤ã®ãƒã‚¤ãƒ³ãƒˆ - å¼¥ç”Ÿé–‹ç™ºè€…ãƒ–ãƒã‚°
åˆæŠ•ç¨¿ã®@sunflatã§ã™ã€‚å¥½ããªãƒ—ãƒã‚°ãƒ©ãƒŸãƒ³ã‚°è¨€èªžã¯ MSX-BASIC ã§ã™ã€‚ Rails 4.1ã§ActiveRecordã«è¿½åŠ ã•ã‚ŒãŸ enum ã«ã¤ã„ã¦ã€ã¡ã‚‡ã£ã¨èª¿ã¹ã¦ã¿ã¾ã—ãŸã€‚ æœ¬å½“ã¯ã€Misocaã®é–‹ç™ºã§enumã‚’ä½¿ã£ã¦ãã®å®Ÿä¾‹ã‚’ç´¹ä»‹ã™ã‚‹äºˆå®šã ã£ãŸã®ã§ã™ãŒã€å¾Œè¿°ã™ã‚‹ç†ç”±ã«ã‚ˆã‚Šä»Šå›žã¯é©ã—ã¦ã„ãªã‹ã£ãŸã®ã§ä½¿ã„ã¾ã›ã‚“ã§ã—ãŸã€‚ ãã“ã§ä»Šå›žã¯ã€(æ ª)Misocaã®è¿‘ãã«ã‚ã‚‹ã€Œãƒ ã‚¬ãƒ«ãƒ‘ãƒ¬ã‚¹ã€ã¨ã„ã†ã‚¤ãƒ³ãƒ‰ã‚«ãƒ¬ãƒ¼å±‹ã•ã‚“ã®ã€ãƒ©ãƒ³ãƒã‚»ãƒƒãƒˆã®ãƒ¡ãƒ‹ãƒ¥ãƒ¼ã‚’ä¾‹ã«ã€enumã‚’ä½¿ã†æ™‚ã«æ°—ã‚’ã¤ã‘ãŸã„ãƒã‚¤ãƒ³ãƒˆã‚’ã„ãã¤ã‹ç´¹ä»‹ã—ã¾ã™ã€‚ enum ã®ä½¿ã„æ–¹ ActiveRecordã® enum ã‚’ä½¿ã†ã¨ã€ãƒ—ãƒã‚°ãƒ©ãƒ ã‹ã‚‰ã¯æ–‡å—åˆ—ï¼ˆåå‰ï¼‰ã§ã‚¢ã‚¯ã‚»ã‚¹ã§ãã€DBã«ã¯æ•´æ•°å€¤ã§ä¿å˜ã•ã‚Œã‚‹å±žæ€§ã‚’ä½œæˆã§ãã¾ã™ã€‚ ã•ã£ãããƒ©ãƒ³ãƒã‚»ãƒƒãƒˆã®ãƒ¢ãƒ‡ãƒ«ã‚’ä½œæˆã—ã¾ã—ã‚‡ã†ã€‚ã‚«ãƒ¬ãƒ¼ã®ç¨®é¡žã¨ã—ã¦ã€ãƒã‚ãƒ³ã€ãƒãƒ¼ã‚¯ã€é‡Žèœã€è±† ã‚’é¸æŠžã§ãã‚‹ã¨ã—ã¾ã™ã€‚enum
aki77 2016/06/07
activerecord

rails
ãƒªãƒ³ã‚¯
Rails 5ã®Active Record attributes APIã«ã¤ã„ã¦
Rails 5ã‹ã‚‰ã€attributes APIã¨ã„ã†æ©Ÿèƒ½ãŒActive Recordã«è¿½åŠ ã•ã‚Œã¾ã—ãŸã€‚attributes APIã¯ã€æ—¢ã«å˜åœ¨ã™ã‚‹attributeã®typeã‚’ä¸Šæ›¸ãã—ãŸã‚Šã€ä»»æ„ã®attributeã‚’å®šç¾©å‡ºæ¥ã‚‹æ©Ÿèƒ½ã§ã™ã€‚ create_table "books", force: :cascade do |t| t.string "name" t.integer "price" t.date "published_on" t.datetime "created_at", null: false t.datetime "updated_at", null: false t.string "out_of_print", default: "false" end
aki77 2016/03/23
Rails5

rails

activerecord
ãƒªãƒ³ã‚¯
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