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肥大化ã—ãŸActiveRecordモデルをリファクタリングã™ã‚‹7ã¤ã®æ–¹æ³•ï¼ˆç¿»è¨³ï¼‰
æ›´æ–°æƒ…å ±: 2013/11/19: åˆç‰ˆå…¬é–‹ 2021/01/08: 訳文見直ã—ã€è¿½è¨˜ ã“ã‚“ã«ã¡ã¯ã€hachi8833ã§ã™ã€‚今回ã¯ã€è‡ªåˆ†ãŒçŸ¥ã‚ŠãŸã‹ã£ãŸã€Active Recordモデルã®ãƒªãƒ•ã‚¡ã‚¯ã‚¿ãƒªãƒ³ã‚°ã«é–¢ã™ã‚‹è¨˜äº‹ã‚’翻訳ã„ãŸã—ã¾ã—ãŸã€‚1å¹´å‰ã®è¨˜äº‹ãªã®ã§Rails 3ãŒå‰æã§ã™ãŒã€Rails 4以é™ã§ã‚‚基本的ã«ã¯å¤‰ã‚らãªã„ã¨æ€ã„ã¾ã™ã€‚リンク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”紹介ã—ãŸã‚ªãƒ–ジェクトã¯ã€app以下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€‚ 注記: 以下ã¯ä½¿ã‚ã‚Œãã†ãªãƒ•ã‚©ãƒ«ãƒ€ã‚’列挙ã—ãŸã ã‘ã§ã‚ã‚Šã€å®Ÿéš›ã«ã¯ã“ã®ä¸€éƒ¨ã—ã‹ä½¿ã„ã¾ã›ã‚“。 Value Object Service Object Form Object Query Object View Object Policy Object Decorator âš“ 肥大化ã—ãŸActive
Arelã§è‰²ã‚“ãªSQLを組ã¿ç«‹ã¦ã¦ã¿ã‚‹ - ryopeko ã®ä½•ã‹
（ã“ã®è¨˜äº‹ã¯ Ruby Advent Calendar jp:2010ã® 15 日目ã§ã™ã€‚å‰æ—¥ã¯ tomohiro68 ã•ã‚“ã§ã—ãŸã€‚） Arelã¨ã¯ Arelã®æ¦‚è¦ã«ã¤ã„ã¦ã¯@a_matsudaã•ã‚“ã®gihyoã®è¨˜äº‹ã‚’å‚ç…§ã—ã¦ãã ã•ã„。 http://gihyo.jp/dev/serial/01/ruby/0043 ã¯ã˜ã‚㫠扱ã†RDBã¯SQlite3ã§ã™ã€‚ 例ã¨ã—ã¦ä»¥ä¸‹ã®ã‚ˆã†ãªã‚¹ã‚ーマをæŒã£ãŸãƒ†ãƒ¼ãƒ–ルをå–り扱ã„ã€é€²ã‚ã¦ã„ãã¾ã™ã€‚ class CreateBooks < ActiveRecord::Migration def self.up create_table :books do |t| t.string :name t.string :category t.timestamps end end def self.down drop_table :books end end 基本的ãª
Grouping by week/month/etc & ActiveRecord?
I'm doing some statics calculation in my product. A user has performed a number of operations, let's say posted comments. I want to be able to show them how many comments they've posted per week for the past month, or per month for the past year. Is there any way with activerecord to group this way? Is my best best to simply do this manually - to iterate over the records summing based on my own cr
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Bubbling Up Nested-transaction Failures with ActiveRecord
ActiveRecordã®joinsã¨preloadã¨includesã¨eager_loadã®é•ã„ - Qiita
GitHub - eagletmt/switch_point: Switching database connection between readonly one and writable one
ActiveRecord finding existing table indexes
http://www.mitchcrowe.com/blog/2012/04/14/10-most-underused-activerecord-relation-methods
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