slbug · August 10, 2014 15:50 · Aug 10, 2014
diff --git a/gistfile1.rb b/gistfile1.rb
@@ -0,0 +1,91 @@
+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 'i18n', github: 'svenfuchs/i18n'
+    gem 'public_activity', github: 'pokonski/public_activity'
+    gem 'sqlite3'
+  GEMFILE
+
+  system 'bundle'
+end
+
+require 'bundler'
+Bundler.setup(:default)
+
+require 'active_record'
+require 'minitest/autorun'
+require 'logger'
+
+require 'public_activity'
+
+# 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 :trips do |t|
+  end
+
+  create_table :travelers do |t|
+    t.integer :trip_id
+    t.integer :user_id
+  end
+
+  create_table :users do |t|
+  end
+
+  create_table "activities", force: true do |t|
+    t.integer  "trackable_id"
+    t.string   "trackable_type"
+    t.integer  "owner_id"
+    t.string   "owner_type"
+    t.string   "key"
+    t.text     "parameters"
+    t.integer  "recipient_id"
+    t.string   "recipient_type"
+    t.datetime "created_at"
+    t.datetime "updated_at"
+  end
+end
+
+class Trip < ActiveRecord::Base
+  has_many :travelers
+  has_many :users, through: :travelers
+end
+
+class Traveler < ActiveRecord::Base
+  include PublicActivity::Model
+  belongs_to :user
+  belongs_to :post
+
+  tracked
+end
+
+class User < ActiveRecord::Base
+  has_many :travelers
+  has_many :trips, through: :travelers
+end
+
+class Activity < PublicActivity::Activity
+end
+
+class BugTest < Minitest::Test
+  def test_association_stuff
+    t = Trip.create!
+    u1 = User.create!
+    u2 = User.create!
+
+    t.users = [u1, u2]
+
+    # 2 activites should be created "traveler.create"
+    assert_equal 2, Activity.where(key: 'traveler.create').count
+
+    t.users = [u1]
+
+    # 1 activity should be created "traveler.destroy"
+    assert_equal 1, Activity.where(key: 'traveler.destroy').count
+  end
+end