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view lib/plugins/acts_as_tree/README @ 1298:4f746d8966dd redmine_2.3_integration
Merge from redmine-2.3 branch to create new branch redmine-2.3-integration
author | Chris Cannam |
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date | Fri, 14 Jun 2013 09:28:30 +0100 |
parents | 433d4f72a19b |
children |
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acts_as_tree ============ Specify this +acts_as+ extension if you want to model a tree structure by providing a parent association and a children association. This requires that you have a foreign key column, which by default is called +parent_id+. class Category < ActiveRecord::Base acts_as_tree :order => "name" end Example: root \_ child1 \_ subchild1 \_ subchild2 root = Category.create("name" => "root") child1 = root.children.create("name" => "child1") subchild1 = child1.children.create("name" => "subchild1") root.parent # => nil child1.parent # => root root.children # => [child1] root.children.first.children.first # => subchild1 Copyright (c) 2007 David Heinemeier Hansson, released under the MIT license