Class: ActiveRecord::Base

Inherits:
Object
  • Object
show all
Defined in:
lib/acts_as_tree_ext.rb,
lib/activerecord_ext.rb,
lib/activerecord_ext.rb

Overview

Wymaga do działania bibliotekli rand.rb raa.ruby-lang.org/project/rand/

Instance Method Summary collapse

Instance Method Details

#depth ⇒ Object

Return the tree depth



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# File 'lib/acts_as_tree_ext.rb', line 17

def depth
  return 0 unless has_children?
  children.inject(0) {|dep,c| dep > c.depth ? dep : c.depth} + 1
end

#has_children? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/acts_as_tree_ext.rb', line 8

def has_children?
  !self.children.size.zero?
end

#has_siblings? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/acts_as_tree_ext.rb', line 12

def has_siblings?
  !self.siblings.size.zero?
end

#leaf(random = false) ⇒ Object 



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# File 'lib/acts_as_tree_ext.rb', line 59

def leaf(random = false)
  unless self.has_children?
    return self
  end

  children = random ? self.children.shuffle : self.children

  children.each { |child|
    return child.leaf(random)
  }
  nil
end

#mh_extensions ⇒ Object 



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# File 'lib/activerecord_ext.rb', line 37

def mh_extensions
  self.class.mh_extensions
end

#nodes_to_root ⇒ Object

Ile węzłów mamy do roota z miejsca gdzie jesteśmy



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# File 'lib/acts_as_tree_ext.rb', line 29

def nodes_to_root
  stop = false
  levels = 0
  parent = self.parent_id
  while !stop
    el =  parent ? self.class.find(parent) : nil
    if el && el.parent_id != el.id
      parent = el.parent_id
      levels += 1
    else
      stop = true
    end
  end
  levels
end

#root ⇒ Object

Znajduje korzeń i zwraca go



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# File 'lib/acts_as_tree_ext.rb', line 51

def root
  el = self
  nodes_to_root.times {
      el = self.parent
  }
  el
end

#valid_parent? ⇒ Boolean

Sprawdza czy nasz rodzic w ogole istnieje

Returns:

  • (Boolean) 


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# File 'lib/acts_as_tree_ext.rb', line 46

def valid_parent?
  self.class.exists?(self.parent_id.to_i)
end

#width ⇒ Object

Return the tree width



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# File 'lib/acts_as_tree_ext.rb', line 23

def width
  return 1 unless has_children?
  children.inject(0) {|sum,c| sum + c.width}
end