Module: ChronicTree::Travesal

Included in:
ChronicTree
Defined in:
lib/chronic_tree/travesal.rb

Instance Method Summary collapse

Instance Method Details

#ancestors ⇒ Object 



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# File 'lib/chronic_tree/travesal.rb', line 38

def ancestors
  init_tree_args_when_nil
  ancestors_relation(current_time_at, current_scope_name).map do |el|
    el.parent.as_tree(current_time_at, current_scope_name)
  end
end

#children ⇒ Object 



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# File 'lib/chronic_tree/travesal.rb', line 3

def children
  init_tree_args_when_nil
  children_relation(current_time_at, current_scope_name).map do |el|
    el.child.as_tree(current_time_at, current_scope_name)
  end
end

#descendants ⇒ Object 



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# File 'lib/chronic_tree/travesal.rb', line 22

def descendants
  init_tree_args_when_nil
  descendants_relation(current_time_at, current_scope_name).inject([]) do |result, el|
    result[el.distance - 1] ||= []
    result[el.distance - 1] << el.child.as_tree(current_time_at, current_scope_name)
    result
  end
end

#existed_in_tree?(time_at = Time.now, scope_name = 'default') ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/chronic_tree/travesal.rb', line 54

def existed_in_tree?(time_at = Time.now, scope_name = 'default')
  existed_relation(time_at, scope_name).any?
end

#flat_descendants ⇒ Object 



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# File 'lib/chronic_tree/travesal.rb', line 31

def flat_descendants
  init_tree_args_when_nil
  descendants_relation(current_time_at, current_scope_name).map do |el|
    el.child.as_tree(current_time_at, current_scope_name)
  end
end

#parent ⇒ Object Also known as: parent? 



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# File 'lib/chronic_tree/travesal.rb', line 10

def parent
  init_tree_args_when_nil
  child_element = parent_relation(current_time_at, current_scope_name).first
  child_element.parent.as_tree(current_time_at, current_scope_name) if child_element
end

#root ⇒ Object 



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# File 'lib/chronic_tree/travesal.rb', line 16

def root
  init_tree_args_when_nil
  child_element = existed_relation(current_time_at, current_scope_name).first
  child_element.root.as_tree(current_time_at, current_scope_name) if child_element
end

#tree_empty?(time_at = Time.now, scope_name = 'default') ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/chronic_tree/travesal.rb', line 47

def tree_empty?(time_at = Time.now, scope_name = 'default')
  ChronicTree::ActiveRecord::Element.
    where(scope_name: scope_name).
    at(time_at).
    empty?
end