Module: ActiveRecord::Persistence::ClassMethods

Defined in:
lib/delta_attributes4/main.rb,
lib/delta_attributes3_2/main.rb

Instance Method Summary collapse

Instance Method Details

#delta_attributes(*args) ⇒ Object 



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# File 'lib/delta_attributes4/main.rb', line 17

def delta_attributes(*args)
  @_delta_attributes ||= Set.new

  return @_delta_attributes if args.empty?

  args.each do |attribute|

    if self.columns_hash[attribute.to_s].blank?
      raise InvalidDeltaColumn.new("#{self.to_s} model doesn't have attribute with name '#{attribute}.")
    end

    if self.columns_hash[attribute.to_s] && !self.columns_hash[attribute.to_s].number?
      raise InvalidDeltaColumn.new("Delta attributes only work with number attributes, column `#{attribute}` is not a number.")
    end

    @_delta_attributes.add(attribute.to_s)
  end

end