Sha256: 9ffb9e8e6c15a325e548b82a6d12948adfc95a99993e25b3cfca489477635cbe
Contents?: true
Size: 1.72 KB
Versions: 2
Compression:
Stored size: 1.72 KB
Contents
module ActiveRecord module Acts #:nodoc: module Tree #:nodoc: def self.append_features(base) super base.extend(ClassMethods) end # Specify this act if you want to model a tree structure by providing a parent association and an children # association. This act assumes that 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 # \_ sub-child1 # # 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 module ClassMethods # Configuration options are: # # * <tt>foreign_key</tt> - specifies the column name to use for track of the tree (default: parent_id) # * <tt>order</tt> - makes it possible to sort the children according to this SQL snippet. def acts_as_tree(options = {}) configuration = { :foreign_key => "parent_id", :order => nil } configuration.update(options) if options.is_a?(Hash) belongs_to :parent, :class_name => name, :foreign_key => configuration[:foreign_key] has_many :children, :class_name => name, :foreign_key => configuration[:foreign_key], :order => configuration[:order], :dependent => true end end end end end
Version data entries
2 entries across 2 versions & 1 rubygems
Version | Path |
---|---|
activerecord-1.2.0 | lib/active_record/acts/tree.rb |
activerecord-1.3.0 | lib/active_record/acts/tree.rb |