Skip Validation

skip_validation.rb

# source: http://gistflow.com/posts/749-canceling-validations-in-activerecord

# declaration
def skipping_validation(methods, &block)
  skipped_validations = methods.map do |method, kinds|
    Array(kinds).map do |kind|
      _validators[method].select { |v| v.kind == kind }.map do |validation|
        _validate_callbacks.select { |c| c.filter == validation }.map do |callback|
          _validate_callbacks.delete(callback)
        end
      end
    end
  end
  begin
    block.call
  ensure
    skipped_validations.flatten.each do |callback|
      _validate_callbacks.append(callback)
    end
  end
end

# usage
skipping_validation(phone: :presence) do
  self.save
end