1 files changed, 31 insertions, 0 deletions
diff --git a/activerecord/test/models/owner.rb b/activerecord/test/models/owner.rb
index 1c7ed4aa3e..cedb774b10 100644
--- a/activerecord/test/models/owner.rb
+++ b/activerecord/test/models/owner.rb
@@ -2,4 +2,35 @@ class Owner < ActiveRecord::Base
   self.primary_key = :owner_id
   has_many :pets, -> { order 'pets.name desc' }
   has_many :toys, :through => :pets
+
+  belongs_to :last_pet, class_name: 'Pet'
+  scope :including_last_pet, -> {
+    select(%q[
+      owners.*, (
+        select p.pet_id from pets p
+        where p.owner_id = owners.owner_id
+        order by p.name desc
+        limit 1
+      ) as last_pet_id
+    ]).includes(:last_pet)
+  }
+
+  after_commit :execute_blocks
+
+  accepts_nested_attributes_for :pets, allow_destroy: true
+
+  def blocks
+    @blocks ||= []
+  end
+
+  def on_after_commit(&block)
+    blocks << block
+  end
+
+  def execute_blocks
+    blocks.each do |block|
+      block.call(self)
+    end
+    @blocks = []
+  end
 end