6 files changed, 22 insertions, 2 deletions
diff --git a/activerecord/test/models/book.rb b/activerecord/test/models/book.rb
index 4cb2c7606b..2170018068 100644
--- a/activerecord/test/models/book.rb
+++ b/activerecord/test/models/book.rb
@@ -9,6 +9,7 @@ class Book < ActiveRecord::Base
 
   enum status: [:proposed, :written, :published]
   enum read_status: {unread: 0, reading: 2, read: 3}
+  enum nullable_status: [:single, :married]
 
   def published!
     super
diff --git a/activerecord/test/models/electron.rb b/activerecord/test/models/electron.rb
index 35af9f679b..6fc270673f 100644
--- a/activerecord/test/models/electron.rb
+++ b/activerecord/test/models/electron.rb
@@ -1,3 +1,5 @@
 class Electron < ActiveRecord::Base
   belongs_to :molecule
+
+  validates_presence_of :name
 end
diff --git a/activerecord/test/models/mixed_case_monkey.rb b/activerecord/test/models/mixed_case_monkey.rb
index 4d37371777..1c35006665 100644
--- a/activerecord/test/models/mixed_case_monkey.rb
+++ b/activerecord/test/models/mixed_case_monkey.rb
@@ -1,5 +1,3 @@
 class MixedCaseMonkey < ActiveRecord::Base
-  self.primary_key = 'monkeyID'
-
   belongs_to :man
 end
diff --git a/activerecord/test/models/molecule.rb b/activerecord/test/models/molecule.rb
index 69325b8d29..26870c8f88 100644
--- a/activerecord/test/models/molecule.rb
+++ b/activerecord/test/models/molecule.rb
@@ -1,4 +1,6 @@
 class Molecule < ActiveRecord::Base
   belongs_to :liquid
   has_many :electrons
+
+  accepts_nested_attributes_for :electrons
 end
diff --git a/activerecord/test/models/pirate.rb b/activerecord/test/models/pirate.rb
index 170fc2ffe3..8510c596a7 100644
--- a/activerecord/test/models/pirate.rb
+++ b/activerecord/test/models/pirate.rb
@@ -13,6 +13,7 @@ class Pirate < ActiveRecord::Base
     :after_add     => proc {|p,pa| p.ship_log << "after_adding_proc_parrot_#{pa.id || '<new>'}"},
     :before_remove => proc {|p,pa| p.ship_log << "before_removing_proc_parrot_#{pa.id}"},
     :after_remove  => proc {|p,pa| p.ship_log << "after_removing_proc_parrot_#{pa.id}"}
+  has_and_belongs_to_many :autosaved_parrots, class_name: "Parrot", autosave: true
 
   has_many :treasures, :as => :looter
   has_many :treasure_estimates, :through => :treasures, :source => :price_estimates
@@ -84,3 +85,11 @@ end
 class DestructivePirate < Pirate
   has_one :dependent_ship, :class_name => 'Ship', :foreign_key => :pirate_id, :dependent => :destroy
 end
+
+class FamousPirate < ActiveRecord::Base
+  self.table_name = 'pirates'
+
+  has_many :famous_ships
+
+  validates_presence_of :catchphrase, on: :conference
+end
diff --git a/activerecord/test/models/ship.rb b/activerecord/test/models/ship.rb
index 3da031946f..7a369b9d9a 100644
--- a/activerecord/test/models/ship.rb
+++ b/activerecord/test/models/ship.rb
@@ -17,3 +17,11 @@ class Ship < ActiveRecord::Base
     false
   end
 end
+
+class FamousShip < ActiveRecord::Base
+  self.table_name = 'ships'
+
+  belongs_to :famous_pirate
+
+  validates_presence_of :name, on: :conference
+end