slbug · July 21, 2014 09:24 · Jul 21, 2014
diff --git a/gistfile1.rb b/gistfile1.rb
@@ -0,0 +1,74 @@
+unless File.exist?('Gemfile')
+  File.write('Gemfile', <<-GEMFILE)
+    source 'https://rubygems.org'
+    gem 'rails', github: 'rails/rails'
+    gem 'arel', github: 'rails/arel'
+    gem 'rack', github: 'rack/rack'
+    gem 'pg'
+  GEMFILE
+
+  system 'bundle'
+end
+
+require 'bundler'
+Bundler.setup(:default)
+
+require 'active_record'
+require 'minitest/autorun'
+require 'logger'
+
+# This connection will do for database-independent bug reports.
+ActiveRecord::Base.establish_connection(adapter: 'postgresql', database: 'pgtest', username: 'pgtest', password: 'pgtest')
+ActiveRecord::Base.logger = Logger.new(STDOUT)
+
+ActiveRecord::Schema.define do
+  create_table :posts do |t|
+  end
+
+  create_table :users do |t|
+    t.integer :company_id
+  end
+
+  create_table :companies do |t|
+  end
+
+  create_table :comments do |t|
+    t.integer :post_id
+    t.integer :user_id
+  end
+end
+
+class User < ActiveRecord::Base
+  belongs_to :company
+
+  delegate :users, to: :company, prefix: :company
+end
+
+class Company < ActiveRecord::Base
+  has_many :users
+end
+
+class Post < ActiveRecord::Base
+  has_many :comments
+
+  scope :commenting, -> (users) {
+    includes(:comments).references(:comments).where(comments: { user: users })
+  }
+end
+
+class Comment < ActiveRecord::Base
+  belongs_to :post
+  belongs_to :user
+end
+
+class BugTest < Minitest::Test
+  def test_association_stuff
+    post = Post.create!
+    company = Company.create!
+    user = User.create!(company: company)
+
+    post.comments << Comment.create!(user: user)
+
+    assert_equal Post.commenting(user.company_users).to_a.size, 1
+  end
+end