Yesterday I was working with an acts_as_tree model and wanted to get all children of the current model as an array. Since there's no descendants method, this is what I came up with.
module Enumerable
def rcollect(&block)
self.map do |item|
collection = block.call(item).compact rescue []
if collection && !collection.empty?
[item, collection.rcollect(&block)]
else
item
end
end
end
end
class Object
def recurse_collecting(&block)
[self, block.call(self).compact.rcollect(&block)]
end
end
Then when I want the model and all its children I do:
model.recurse_collecting(&:children)
May not be useful to everyone, but I found it to be a fun exercise.
