48 lines
1 KiB
Ruby
48 lines
1 KiB
Ruby
# frozen_string_literal: true
|
|
|
|
# Helper that sets attributes to nil prior to validation if they
|
|
# are blank (are false, empty or contain only whitespace), to avoid
|
|
# unnecessarily persisting empty strings.
|
|
#
|
|
# Model usage:
|
|
#
|
|
# class User < ApplicationRecord
|
|
# include NullifyIfBlank
|
|
#
|
|
# nullify_if_blank :name, :email
|
|
# end
|
|
#
|
|
#
|
|
# Test usage:
|
|
#
|
|
# RSpec.describe User do
|
|
# it { is_expected.to nullify_if_blank(:name) }
|
|
# it { is_expected.to nullify_if_blank(:email) }
|
|
# end
|
|
#
|
|
module NullifyIfBlank
|
|
extend ActiveSupport::Concern
|
|
|
|
class_methods do
|
|
def nullify_if_blank(*attributes)
|
|
self.attributes_to_nullify += attributes
|
|
end
|
|
end
|
|
|
|
included do
|
|
class_attribute :attributes_to_nullify,
|
|
instance_accessor: false,
|
|
instance_predicate: false,
|
|
default: Set.new
|
|
|
|
before_validation :nullify_blank_attributes
|
|
end
|
|
|
|
private
|
|
|
|
def nullify_blank_attributes
|
|
self.class.attributes_to_nullify.each do |attribute|
|
|
assign_attributes(attribute => nil) if read_attribute(attribute).blank?
|
|
end
|
|
end
|
|
end
|