Class: Mongoid::Acts::Tree::Children

Inherits:
Array
  • Object
show all
Defined in:
lib/mongoid_acts_as_tree.rb

Overview

proxy class

Instance Method Summary collapse

Constructor Details

#initialize(owner) ⇒ Children

TODO: improve accessors to options to eliminate object



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# File 'lib/mongoid_acts_as_tree.rb', line 188

def initialize(owner)
	@parent = owner
	self.concat find_children_for_owner.to_a
end

Instance Method Details

#<<(object, will_save = true) ⇒ Object Also known as: push

Add new child to list of object children



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# File 'lib/mongoid_acts_as_tree.rb', line 194

def <<(object, will_save=true)
	if object.descendants.include? @parent
		object.instance_variable_set :@_cyclic, true
	else
		object.write_attribute object.parent_id_field, @parent._id
		object[object.path_field] = @parent[@parent.path_field] + [@parent._id]
		object[object.depth_field] = @parent[@parent.depth_field] + 1
		object.instance_variable_set :@_will_move, true
		object.save if will_save
	end

	super(object)
end

#build(attributes) ⇒ Object Also known as: create 



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# File 'lib/mongoid_acts_as_tree.rb', line 208

def build(attributes)
	child = @parent.class.new(attributes)
	self.push child
	child
end

#clear ⇒ Object

Clear children list



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# File 'lib/mongoid_acts_as_tree.rb', line 237

def clear
	self.each do | child |
		@parent.children.delete child
	end
end

#delete(object_or_id) ⇒ Object

Deletes object only from children list. To delete object use object.destroy.



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# File 'lib/mongoid_acts_as_tree.rb', line 220

def delete(object_or_id)
	object = case object_or_id
		when String, BSON::ObjectId
			@parent.class.find object_or_id
		else
			object_or_id
	end

	object.write_attribute object.parent_id_field, nil
	object[object.path_field]      = []
	object[object.depth_field]     = 0
	object.save

	super(object)
end