Module: ExtendedNestedSet::InstanceMethods

Defined in:
lib/extended_nested_set/instance_methods.rb

Instance Method Summary collapse

Instance Method Details

#is_first_of_siblings?(parent = nil) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/extended_nested_set/instance_methods.rb', line 4

def is_first_of_siblings?(parent = nil)
  if parent
    parent.lft == self.lft - 1
  else
    left_sibling.nil?
  end
end

#is_last_of_siblings?(parent = nil) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/extended_nested_set/instance_methods.rb', line 12

def is_last_of_siblings?(parent = nil)
  if parent
    parent.rgt == self.rgt + 1
  else
    right_sibling.nil?
  end
end

#move_higher ⇒ Object 



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# File 'lib/extended_nested_set/instance_methods.rb', line 24

def move_higher
  move_to_left_of left_sibling unless is_first_of_siblings?
end

#move_lower ⇒ Object 



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# File 'lib/extended_nested_set/instance_methods.rb', line 20

def move_lower
  move_to_right_of(right_sibling) unless is_last_of_siblings?
end

#move_to_bottom ⇒ Object 



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# File 'lib/extended_nested_set/instance_methods.rb', line 28

def move_to_bottom
  move_to_right_of siblings.last unless is_last_of_siblings?
end

#move_to_top ⇒ Object 



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# File 'lib/extended_nested_set/instance_methods.rb', line 32

def move_to_top
  move_to_left_of siblings.first unless is_first_of_siblings?
end