Provides an ActiveRecord validator that ensures a polymorphic association

• is an instance of specific class or one of its subclasses or
• implements a specific Concern

belongs_to :account, polymorphic: true
validates :account, is_a: Account

Ruby version is managed by rvm & .rvmrc

gem install bundler
bundle install
bundle exec appraisal install
bundle exec appraisal rspec

bundle exec rdoc

# Update lib/is_a_validator/version.rb
gem build is_a_validator.gemspec
git tag -a vX.X -m "Releasing vX.X"
git push origin vX.X

IsAValidator is released under an MIT-LICENSE. Use it how you see fit.