Contents

# Example from 'Overwriting default accessors' in ActiveRecord::Base.
class Song < ActiveRecord::Base
  has_paper_trail

  # Uses an integer of seconds to hold the length of the song
  def length=(minutes)
    write_attribute(:length, minutes.to_i * 60)
  end

  def length
    read_attribute(:length) / 60
  end

  if ActiveRecord::VERSION::MAJOR >= 5
    attribute :name, :string
  else
    attr_accessor :name

    # override attributes hashes like some libraries do
    def attributes_with_name
      if name
        attributes_without_name.merge(name: name)
      else
        attributes_without_name
      end
    end

    # `alias_method_chain` is deprecated in rails 5, but we cannot use the
    # suggested replacement, `Module#prepend`, because we still support ruby 1.9.
    alias attributes_without_name attributes
    alias attributes attributes_with_name

    def changed_attributes_with_name
      if name
        changed_attributes_without_name.merge(name: name)
      else
        changed_attributes_without_name
      end
    end

    # `alias_method_chain` is deprecated in rails 5, but we cannot use the
    # suggested replacement, `Module#prepend`, because we still support ruby 1.9.
    alias changed_attributes_without_name changed_attributes
    alias changed_attributes changed_attributes_with_name
  end
end

Version data entries

3 entries across 3 versions & 1 rubygems

Version	Path
paper_trail-6.0.2	test/dummy/app/models/song.rb
paper_trail-6.0.1	test/dummy/app/models/song.rb
paper_trail-6.0.0	test/dummy/app/models/song.rb