# frozen_string_literal: true require "bundler/inline" gemfile(true) do source "https://rubygems.org" git_source(:github) { |repo| "https://github.com/#{repo}.git" } gem "rails", github: "rails/rails" gem "sqlite3" end require "active_record" require "minitest/autorun" require "logger" # 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 :posts, force: true do |t| end create_table :comments, force: true do |t| t.integer :post_id end end class Post < ActiveRecord::Base has_many :comments end class Comment < ActiveRecord::Base belongs_to :post end class BugTest < Minitest::Test def test_association_stuff post = Post.create! post.comments << Comment.create! assert_equal 1, post.comments.count assert_equal 1, Comment.count assert_equal post.id, Comment.first.post.id end end