Module: Mongoid::Tree::ClassMethods
- Defined in:
- lib/mongoid/tree.rb
Overview
This module implements class methods that will be available on the document that includes Mongoid::Tree
Instance Method Summary collapse
-
#leaves ⇒ Mongoid::Criteria
Returns all leaves (be careful, currently involves two queries).
-
#root ⇒ Mongoid::Document
Returns the first root document.
-
#roots ⇒ Mongoid::Criteria
Returns all root documents.
Instance Method Details
#leaves ⇒ Mongoid::Criteria
Returns all leaves (be careful, currently involves two queries)
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# File 'lib/mongoid/tree.rb', line 155 def leaves where(:_id.nin => only(:parent_id).collect(&:parent_id)) end |
#root ⇒ Mongoid::Document
Returns the first root document
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# File 'lib/mongoid/tree.rb', line 133 def root roots.first end |
#roots ⇒ Mongoid::Criteria
Returns all root documents
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# File 'lib/mongoid/tree.rb', line 144 def roots where(:parent_id => nil) end |