Module: Parentry::Navigation

Defined in:
lib/parentry/navigation.rb

Instance Method Summary collapse

Instance Method Details

#ancestor_ids ⇒ Object 



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# File 'lib/parentry/navigation.rb', line 25

def ancestor_ids
  path_ids[0..-2]
end

#ancestors(scopes = {}) ⇒ Object 



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# File 'lib/parentry/navigation.rb', line 29

def ancestors(scopes = {})
  with_depth_scopes(scopes) do
    parentry_scope.where(id: ancestor_ids).order_by_parentry
  end
end

#children? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/parentry/navigation.rb', line 40

def children?
  !leaf?
end

#depth ⇒ Object 



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# File 'lib/parentry/navigation.rb', line 80

def depth
  path_ids.size - 1 + depth_offset
end

#descendant_ids(scopes = {}) ⇒ Object 



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# File 'lib/parentry/navigation.rb', line 70

def descendant_ids(scopes = {})
  descendants(scopes).pluck(:id)
end

#descendants(scopes = {}) ⇒ Object 



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# File 'lib/parentry/navigation.rb', line 74

def descendants(scopes = {})
  with_depth_scopes(scopes) do
    subtree.where.not(id: id)
  end
end

#leaf? ⇒ Boolean Also known as: childless?

Returns:

  • (Boolean) 


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# File 'lib/parentry/navigation.rb', line 35

def leaf?
  children.size == 0
end

#only_child? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/parentry/navigation.rb', line 56

def only_child?
  !siblings?
end

#path(scopes = {}) ⇒ Object 



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# File 'lib/parentry/navigation.rb', line 19

def path(scopes = {})
  with_depth_scopes(scopes) do
    parentry_scope.where(id: path_ids).order_by_parentry
  end
end

#path_ids ⇒ Object 



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# File 'lib/parentry/navigation.rb', line 15

def path_ids
  parentry.split('.').map(&:to_i)
end

#root ⇒ Object 



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# File 'lib/parentry/navigation.rb', line 7

def root
  unscoped_find(root_id)
end

#root? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/parentry/navigation.rb', line 11

def root?
  root_id == id
end

#root_id ⇒ Object 



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# File 'lib/parentry/navigation.rb', line 3

def root_id
  path_ids[0]
end

#sibling_ids ⇒ Object 



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# File 'lib/parentry/navigation.rb', line 44

def sibling_ids
  siblings.pluck(:id)
end

#siblings ⇒ Object 



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# File 'lib/parentry/navigation.rb', line 48

def siblings
  parentry_scope.where.not(id: id).where.not(parent_id: nil).where(parent_id: parent_id)
end

#siblings? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/parentry/navigation.rb', line 52

def siblings?
  siblings.size > 0
end

#subtree(scopes = {}) ⇒ Object 



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# File 'lib/parentry/navigation.rb', line 64

def subtree(scopes = {})
  with_depth_scopes(scopes) do
    parentry_scope.where("#{parentry_column} <@ ?", parentry)
  end
end

#subtree_ids(scopes = {}) ⇒ Object 



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# File 'lib/parentry/navigation.rb', line 60

def subtree_ids(scopes = {})
  subtree(scopes).pluck(:id)
end