Arel ã§ã‚µãƒ–クエリ - QiitaDeleted articles cannot be recovered. Draft of this article would be also deleted. Are you sure you want to delete this article?
第43回　Rails 3を支ãˆã‚‹å脇役ãŸã¡ ãã®1 - Arel - | gihyo.jp
ã¯ã˜ã‚ã« Ruby on Railsã®2å¹´åŠã¶ã‚Šã®ãƒ¡ã‚¸ãƒ£ãƒ¼ãƒãƒ¼ã‚¸ãƒ§ãƒ³ã‚¢ãƒƒãƒ—ã§ã‚ã‚‹3.0ã®æ£å¼ãƒªãƒªãƒ¼ã‚¹ãŒã„よã„よ間近ã«è¿«ã£ã¦ãã¾ã—ãŸã€‚ Rails 3ã¯ã€ã‚¢ãƒ—リケーション・レベルã§ã¯Rails 2.3ã¨ã®äº’æ›æ€§ã‚’ãªã‚‹ã¹ãä¿ã¡ãªãŒã‚‰ã‚‚ã€ãƒ¡ã‚¸ãƒ£ãƒ¼ãƒãƒ¼ã‚¸ãƒ§ãƒ³ã‚¢ãƒƒãƒ—ã ã‘ã‚ã£ã¦ãƒ•ãƒ¬ãƒ¼ãƒ ワーク自体ã¯éš…々ã«ã¾ã§å¾¹åº•çš„ãªãƒªãƒ•ã‚¡ã‚¯ã‚¿ãƒªãƒ³ã‚°ãŒæ–½ã•ã‚Œã¦æ›´ãªã‚‹æ´—ç·´ã‚’é‚ã’ã¦ã„ã¾ã™ã€‚çµæžœã¨ã—ã¦ã€Rails 3ã§ã¯èžé€šã®åŠ¹ã‹ãªã„ãƒ•ãƒ«ã‚¹ã‚¿ãƒƒã‚¯æ§‹é€ ã‚’æ¨ã¦ã¦ã™ã£ãã‚Šã¨ã—ãŸãƒ¢ã‚¸ãƒ¥ãƒ¼ãƒ«ç‹¬ç«‹æ€§ãŒå®Ÿç¾ã•ã‚Œã¦ã„ã‚‹ã®ã§ã™ãŒã€ã“ã®éš›ã«ã€Merbã¨ã®åˆä½µã®å½±éŸ¿ã‚‚ã‚ã£ã¦ã‹ã€ã„ãã¤ã‹ã®æ–°ãŸãªå¤–部ライブラリã«ä¾å˜ã™ã‚‹å½¢ã«ãªã£ã¦ã„ã‚‹ã®ã‚‚興味深ã„ã¨ã“ã‚ã§ã™ã€‚ ãã“ã§æœ¬ç¨¿ã§ã¯ã€ã‚ãˆã¦Rails 3ãã®ã‚‚ã®ã§ã¯ãªãã€ã“ã®Rails 3ã®å¤§æ”¹é€ ã®èˆžå°è£ã‚’支ãˆã‚‹è£æ–¹ã•ã‚“ã«ã‚¹ãƒãƒƒãƒˆãƒ©ã‚¤ãƒˆã‚’当ã¦ã¦ã¿ãŸã„ã¨æ€ã„ã¾ã™ã€‚ Arelã«ã‚ˆã£ã¦ãƒ‘ラダイムãŒå¤§ãã変ã‚ã£ãŸAct
Why Arel? « Magic Scaling Sprinkles
The upcoming version 3 of Ruby on Rails will feature a sexy new querying API from ActiveRecord. Here is an example: User.order('users.id DESC').limit(20).includes(:items) You can see that all queries are now chainable. This has two principal benefits: first, you can programmatically generate complex queries (based on user input or other data); and second, you can refactor your queries to eliminat
1
ランã‚ング
ランã‚ング
ãŠçŸ¥ã‚‰ã›
リリースã€éšœå®³æƒ…å ±ãªã©ã®ã‚µãƒ¼ãƒ“スã®ãŠçŸ¥ã‚‰ã›
最新ã®äººæ°—エントリーã®é…ä¿¡
処ç†ã‚’実行ä¸ã§ã™
j次ã®ãƒ–ックマーク
kå‰ã®ãƒ–ックマーク
lã‚ã¨ã§èªã‚€
eコメント一覧を開ã
oページを開ã
Carl Lerche on Rails 3 and Arel
GitHub - rails/arel: A Relational Algebra
{{#tags}}- {{label}}
{{/tags}}