Module: Xylem::ClassMethods

Defined in:

lib/xylem.rb

Instance Method Summary

• #leaves ⇒ Object
• #root ⇒ Object
• #roots ⇒ Object

Instance Method Details

#leaves ⇒ Object

# File 'lib/xylem.rb', line 70

def leaves
  where.not(id: select(:parent_id).where.not(parent_id: nil))
end

#root ⇒ Object

# File 'lib/xylem.rb', line 62

def root
  roots.first
end

#roots ⇒ Object

# File 'lib/xylem.rb', line 66

def roots
  where(parent: nil)
end