rails_association_validation.rb

begin
  require 'bundler/inline'
rescue LoadError => e
  $stderr.puts 'Bundler version 1.10 or later is required. Please update your Bundler'
  raise e
end

gemfile(true) do
  source 'https://rubygems.org'
  gem 'activerecord'
  gem 'sqlite3'
end

require 'active_record'
require 'minitest/autorun'
require 'logger'

# Ensure backward compatibility with Minitest 4
Minitest::Test = MiniTest::Unit::TestCase unless defined?(Minitest::Test)

# This connection will do for database-independent bug reports.
ActiveRecord::Base.establish_connection(adapter: 'sqlite3', database: ':memory:')
ActiveRecord::Base.logger = Logger.new(STDOUT)

ActiveRecord::Schema.define do
  create_table :users, force: true do |t|
  end

  create_table :contact_infos, force: true do |t|
    t.references :user
    t.string :name
  end
end

class User < ActiveRecord::Base
  has_one :contact_info
  accepts_nested_attributes_for :contact_info
end

class ContactInfo < ActiveRecord::Base
  belongs_to :user
  validates :name, presence: true
end

class BugTest < Minitest::Test
  def test_association_validation
    user = User.new({ contact_info_attributes: {}})
    assert(user.valid?, user.errors.full_messages)
  end
end