Module: OpenStax::Utilities::ActsAsNumberable::ContainerInstanceMethods

Defined in:
lib/openstax/utilities/acts_as_numberable.rb

Instance Method Summary collapse

Instance Method Details

#me_and_peers ⇒ Object 



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# File 'lib/openstax/utilities/acts_as_numberable.rb', line 197

def me_and_peers
  my_class.where(container_column => self.send(container_column))
end

#move_to_container!(new_container) ⇒ Object 



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# File 'lib/openstax/utilities/acts_as_numberable.rb', line 159

def move_to_container!(new_container)
  return if new_container.id == self.send(container_column)
  ActiveRecord::Base.transaction do
    remove_from_container!

    self.send container + "=", new_container

    self.assign_number
    self.save!
    self.changed_sets = true
  end
end

#my_class ⇒ Object 



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# File 'lib/openstax/utilities/acts_as_numberable.rb', line 193

def my_class
  table_class || self.class
end

#remove_from_container! ⇒ Object 



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# File 'lib/openstax/utilities/acts_as_numberable.rb', line 172

def remove_from_container!
  later_items = my_class.where(container_column => self.send(container_column))
                        .where("#{number_field} > ?", self.send(number_field))

  if !self.destroyed
    self.send "#{number_field}=", nil
    self.send container_column + '=', nil
    self.save!
  end

  # Do this to make sure that the reordering below doesn't 
  # cause a number to be duplicated temporarily (which would
  # cause a validation error)
  later_items.sort_by!{|item| item.send(number_field)}

  later_items.each do |later|
    later.send("#{number_field}=", later.send(number_field)-1)
    later.save!
  end
end