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acts asã‚’ 使ã£ã¦ã¿ã‚ˆã† 藤岡岳之 (xibbar) アジェンダ • acts as list • acts as tree • acts as nested set • better nested set acts as listã¨ã¯ • Railsã«æ¨™æº–ã§ã¤ã„ã¦ã„ã‚‹ • é †åˆ—ã‚’æ‰±ã†ã¨ãã«ä¾¿åˆ© ã©ã†ã‚„ã£ã¦ä½¿ã†ï¼Ÿ • positionã¨ã„ã†integeråž‹ã®ã‚«ãƒ©ãƒ ã‚’è¿½åŠ â€¢ modelã«acts_as_listã‚’è¿½åŠ class CreateUsers < ActiveRecord::Migration def self.up create_table :users do |t| t.column :name, :string t.column :position, :integer end end def self.down drop_table :users end end c
Plugins - BetterNestedSet - Agile Web Development
Better nested set This plugin provides an ehanced acts_as_nested_set mixin for ActiveRecord, the object-db mapping layer of the framework RubyOnRails. The original nested set feature seems to be quite old and missed some necessary functionalities. Details This acts provides Nested Set functionality. Nested Set is a smart way to implement an ordered tree, with the added feature that you can select
Better nested set - ç¦å³¶é¤ƒåRuby親方
http://agilewebdevelopment.com/plugins/betternestedset ã“ã“ã«ã‚ã‚Šã¾ã™ã€‚ã©ã†ã„ã†ã‚‚ã®ã‹ã¨ã„ã†ã¨ã€acts_as_nested_setã‚’æ‹¡å¼µã—㦠便利ã«ã—ãŸã‚‚ã®ã§ã™ã€‚ acts_as_nested_set + acts_as_tree + 便利= better_nested_set ã¨ã„ã£ãŸæ„Ÿã˜ã§ã™ã€‚ インストール方法 ./script/plugin install http://opensource.symetrie.com/svn/better_nested_set/trunkãŸã ã€trunkã¨ã„ã†åå‰ã«ãªã‚‹ã®ã§ã€ãƒªãƒãƒ¼ãƒ ã—ãŸæ–¹ãŒã„ã„æ°—ãŒã—ã¾ã™ã€‚ 使ãˆã‚‹ãƒ¡ã‚½ãƒƒãƒ‰ä¸€è¦§ move_to_child_of 別ã®å ´æ‰€ã«ã¶ã‚‰ä¸‹ã’ã‚‹ move_to_right_of別ã®å ´æ‰€ã«ã¶ã‚‰ä¸‹ã’ã‚‹ move_to_left_of別ã®å ´æ‰€ã«ã¶ã‚‰ä¸‹ã’ã‚‹ root
LL::é‚::2007 - An Ordinary Perl 5.10 Guide
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bradã¨myã¨use fieldsã¨Pseudo-hashesã¨Hash::Util㨠bradプãƒãƒ€ã‚¯ãƒˆã§ã¯use fieldsãŒå¤šç”¨ã•ã‚Œã¦ã„ã¾ã™ã€‚ãã—ã¦ã€ my ClassName $var;ã®ã‚ˆã†ãªå¤‰æ•°å®£è¨€ãŒå¤šç”¨ã•ã‚Œã¦ã„ã¾ã™ã€‚ perldoc -f myã—ã¦ã¿ã‚‹ã¨use fieldsã§ä½¿ã†ã¿ãŸã„ãªäº‹ãŒæ›¸ã„ã¦ã‚ã‚Šã¾ã—ãŸã€‚ use fieldsã£ã¦ã®ã¯ package Jitensya; use strict; use warnings; use fields qw/(sound); sub new { my $proto = shift; my $self = ref $proto ? $proto : fields::new($proto); $self; } 1; ã®ã‚ˆã†ãªã‚³ãƒ¼ãƒ‰ãŒã‚ã‚‹ã¨ã—㦠use strict; use warnings; use Jitensya; my $
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http://blog.rapidred.com/articles/2006/06/08/ruby-working-with-trees
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