gistfile1.txt

require 'bundler/inline'

gemfile(true) do
  source 'https://rubygems.org'
  gem 'rails', '~> 5.2.0'
  gem 'sqlite3'
end

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

ActiveRecord::Base.establish_connection(adapter: 'sqlite3', database: ':memory:')
ActiveRecord::Base.logger = Logger.new(STDOUT)
ActiveSupport::Deprecation.debug = true

ActiveRecord::Schema.define do
  create_table :teams do |t|
    t.timestamps
  end

  create_table :users do |t|
    t.belongs_to :team
    t.string :level, :null => false
    t.timestamps
  end
end

class Team < ActiveRecord::Base
  has_many :users
  has_many :owners, -> { where level: "owner" },
                    class_name: "User"
end

class User < ActiveRecord::Base
  attribute :level, default: 'member'
end

class ExampleTest < Minitest::Test
  def test_add_users_to_team
    team = Team.create
    member = team.users.create
    assert_equal "member", member.level
  end

  def test_add_owners_to_team
    team = Team.create
    owner = team.owners.create
    assert_equal "owner", owner.level # fails
  end
end