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第3回　DBIx::Classã§ãƒ‡ãƒ¼ã‚¿ãƒ™ãƒ¼ã‚¹æ“作（1） | gihyo.jp
本連載ã§ã¯ç¬¬ä¸€ç·šã®Perlãƒãƒƒã‚«ãƒ¼ãŒå›žæ›¿ã‚ã‚Šã§åŸ·ç†ã—ã¦ã„ãã¾ã™ã€‚今回ã¯ã‚«ãƒ¤ãƒƒã‚¯ã®æ‘瀬大輔ã•ã‚“ã§ã€ãƒ†ãƒ¼ãƒžã¯DBIx::Classã§ã™ã€‚ DBIx::Classã¨ã¯ DBIx::Classã¯Perlã®O/Rマッピングモジュールã§ã™ã€‚O/Rマッピング（Object/Relational Mappingã€ä»¥ä¸‹ORM）ã¨ã¯ã€ã‚ªãƒ–ジェクト指å‘言語ã«ãŠã‘るオブジェクトã¨ãƒªãƒ¬ãƒ¼ã‚·ãƒ§ãƒŠãƒ«ãƒ‡ãƒ¼ã‚¿ãƒ™ãƒ¼ã‚¹ã‚’ç´ã¥ã‘ã‚‹ã—ãã¿ã®ã“ã¨ã§ã€ORMを使用ã™ã‚‹ã¨ãƒ¦ãƒ¼ã‚¶ã¯ç›´æ„Ÿçš„ãªã‚ªãƒ–ジェクトæ“作ã«ã‚ˆã£ã¦ãƒ‡ãƒ¼ã‚¿ãƒ™ãƒ¼ã‚¹ã‚’æ“作ã§ãるよã†ã«ãªã‚Šã¾ã™ã€‚ DBIx::Classã¯Perlã®ORMã¨ã—ã¦ã¯ç¾åœ¨ä¸–ç•Œã§ä¸€ç•ªä½¿ã‚ã‚Œã¦ã„るモジュールã§ã™ã€‚日本ã§ã¯æœ€è¿‘データベースæ“作モジュールã¨ã—ã¦ã‚ˆã‚Šè»½é‡ãªDBIx::Skinnyã‚„Data::Modelãªã©ã®æ³¨ç›®ãŒé«˜ã¾ã£ã¦ãã¦ã„ã¾ã™ãŒã€æ©Ÿèƒ½çš„ã«æž¯ã‚Œã¦ã„る点や豊富ã«ãƒ†ã‚¹ãƒˆã•ã‚Œã¦ã„る点ã§DBIx::Cl
DBIx::Class::Storage::DBI::Replicationã«ã¦Masterã§å‚照クエリを発行ã™ã‚‹æ–¹æ³• - Unknown::Programming
DBIx::Classã®ã¡ã‚‡ã£ã¨ã—ãŸãƒ¡ãƒ¢ã€ãã®ï¼’。・・・ã¨ã€æ€ã„ãã‚„é•·ããªã£ãŸã®ã§ä¸€è¨˜äº‹ã«ã€‚ Masterã§å‚照クエリを発行ã™ã‚‹æ–¹æ³•ãªã‚“ã ã‘ã©ã€ã¡ã‚‡ã“ã¡ã‚‡ã“ã¨èª¿ã¹ã¦è¦‹ãŸã‘ã©æƒ…å ±ãŒæ®†ã©ãªã„ã®ã。 ãŸã ã¿ã‚“ãªè‰²ã€…考ãˆã¦ã„るよã†ã§ã€ä¾‹ãˆã° use Blog::Schema; my $schema = Test::Blog::Schema->connect("dbi:SQLite:$master"); # set slave data sources. $schema->slave_connections( ["dbi:SQLite:$slave_1"], ["dbi:SQLite:$slave_2"], ); # do something in slave connection. $schema->slave->resultset('Entry')->find(1); DBIx::Classã§ã‚¹
自分ã®æœ€è¿‘ã®Catalystã®ãƒ¢ãƒ‡ãƒ«éƒ¨åˆ†ã®æ›¸ãæ–¹ - D-6 [相変ã‚らãšæ ¹ç„¡ã—]
自分ã®æœ€è¿‘ã®Catalystã®ãƒ¢ãƒ‡ãƒ«éƒ¨åˆ†ã®æ›¸ãæ–¹ ã“ã¡ã‚‰ã®ãƒ–ãƒã‚°ã§ãªã‚“ã‹å‘¼ã°ã‚ŒãŸæ°—ãŒã—ãŸã®ã§ã¨ã‚Šã‚ãˆãšæ›¸ã„ã¦ã¿ãŸã€‚ ã‚ãã¾ã§è‡ªåˆ†ã¯ã©ã†ã—ã¦ã‚‹ã‹ã€ã£ã¦è©±ã§ã™ãŒã€æœ€è¿‘ã¯Catalystã§ãªã‚“ã‹æ›¸ãã¨ãã¯ã“ã‚“ãªæ„Ÿã˜ã§ä½¿ã£ã¦ã¾ã™ã€‚ 色んãªäº‹ãŒã“ã®å›³ã«è©°ã¾ã£ã¦ã„ã‚‹ã®ã§ã€ç®‡æ¡æ›¸ãã—ã¦ã¿ã‚‹ï¼š Model::APIãŒAPIオブジェクトを作æˆã—ã¦ã€ä½¿ç”¨æ™‚ã«ã¯Model::APIã«å¯¾ã—ã¦`find()`ã¨ã„ã†ãƒ¡ã‚½ãƒƒãƒ‰ã‚’使ã£ã¦å®Ÿéš›ã®APIオブジェクトをæŒã£ã¦ãã‚‹Schemaç‰ã¯MyApp::Schemaã«å®šç¾©ã—ã€Model::APIã®ã‚¢ãƒˆãƒªãƒ“ュートã¨ã—ã¦æŒã£ã¦ã„る。cacheã‚‚åŒç‰ã€‚ã“れらã®åˆæœŸåŒ–引数ã¯è¨å®šãƒ•ã‚¡ã‚¤ãƒ«ã®Model::APIã‹ã‚‰å–れるよã†ã«ã—ã¦ãŠãCatalyst::Model::DBIC::Schemaã¯ï¼Šä½¿ã£ã¦ãªã„＊Model::APIã§ã¯ACCEPT_CONTEXTãŒå‘¼ã°ã‚ŒãŸæ™‚点ã§ã€ã‚‚ã—ã¾ã åˆ
DBIx::Class::Manual::Cookbook - レシピã„ã‚ã„ã‚ - perldoc.jp
åå‰Â¶ DBIx::Class::Manual::Cookbook - レシピã„ã‚ã„゠レシピ¶ 検索¶ ページ処ç†ã•ã‚ŒãŸçµæžœã‚»ãƒƒãƒˆÂ¶ When you expect a large number of results, you can ask DBIx::Class for a paged resultset, which will fetch only a small number of records at a time: çµæžœã‚»ãƒƒãƒˆãŒè†¨å¤§ã«ãªã‚Šãã†ãªã‚‰ã€ãƒšãƒ¼ã‚¸å‡¦ç†ã•ã‚ŒãŸçµæžœã‚’DBIx::Classã§å–å¾—ã§ãã¾ã™ã€‚ 一回ã«ã€å°‘ã—ã®ãƒ¬ã‚³ãƒ¼ãƒ‰ã—ã‹ã¨ã£ã¦ãã¾ã›ã‚“: my $rs = $schema->resultset('Artist')->search( undef, { page => 1, # page to return (defaults to 1) rows => 10, #
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