Module: Arboreal::ActiveRecordExtensions
- Defined in:
- lib/arboreal/active_record_extensions.rb
Instance Method Summary collapse
-
#acts_arboreal ⇒ Object
Declares that this ActiveRecord::Base model has a tree-like structure.
Instance Method Details
#acts_arboreal ⇒ Object
Declares that this ActiveRecord::Base model has a tree-like structure.
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# File 'lib/arboreal/active_record_extensions.rb', line 5 def acts_arboreal belongs_to :parent, :class_name => self.name has_many :children, :class_name => self.name, :foreign_key => :parent_id extend Arboreal::ClassMethods include Arboreal::InstanceMethods before_validation :populate_ancestry_string validate do |record| record.send(:validate_parent_not_ancestor) end before_save :detect_ancestry_change after_save :apply_ancestry_change_to_descendants named_scope :roots, { :conditions => ["parent_id IS NULL"] } end |