Support associations (no has_and_belongs_to)

app/controllers/admin/versions_controller.rb

@@ -11,6 +11,6 @@ class Admin::VersionsController < Admin::BaseController
   private
 
   def set_version
-    @version = PaperTrail::Version.find(params[:id]).reify
+    @version = PaperTrail::Version.find(params[:id]).reify(has_one: true)
   end
 end

db/migrate/20151014121823_create_version_associations.rb

@@ -0,0 +1,17 @@
+class CreateVersionAssociations < ActiveRecord::Migration
+  def self.up
+    create_table :version_associations do |t|
+      t.integer  :version_id
+      t.string   :foreign_key_name, :null => false
+      t.integer  :foreign_key_id
+    end
+    add_index :version_associations, [:version_id]
+    add_index :version_associations, [:foreign_key_name, :foreign_key_id], :name => 'index_version_associations_on_foreign_key'
+  end
+
+  def self.down
+    remove_index :version_associations, [:version_id]
+    remove_index :version_associations, :name => 'index_version_associations_on_foreign_key'
+    drop_table :version_associations
+  end
+end

db/migrate/20151014121824_add_transaction_id_column_to_versions.rb

@@ -0,0 +1,11 @@
+class AddTransactionIdColumnToVersions < ActiveRecord::Migration
+  def self.up
+    add_column :versions, :transaction_id, :integer
+    add_index :versions, [:transaction_id]
+  end
+
+  def self.down
+    remove_index :versions, [:transaction_id]
+    remove_column :versions, :transaction_id
+  end
+end

db/schema.rb

@@ -11,7 +11,7 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema.define(version: 20151009204428) do
+ActiveRecord::Schema.define(version: 20151014121824) do
 
   create_table "awaken_types", force: :cascade do |t|
     t.string   "name"
@@ -134,6 +134,15 @@ ActiveRecord::Schema.define(version: 20151009204428) do
 
   add_index "users_roles", ["user_id", "role_id"], name: "index_users_roles_on_user_id_and_role_id"
 
+  create_table "version_associations", force: :cascade do |t|
+    t.integer "version_id"
+    t.string  "foreign_key_name", null: false
+    t.integer "foreign_key_id"
+  end
+
+  add_index "version_associations", ["foreign_key_name", "foreign_key_id"], name: "index_version_associations_on_foreign_key"
+  add_index "version_associations", ["version_id"], name: "index_version_associations_on_version_id"
+
   create_table "versions", force: :cascade do |t|
     t.string   "item_type",                         null: false
     t.integer  "item_id",                           null: false
@@ -141,8 +150,10 @@ ActiveRecord::Schema.define(version: 20151009204428) do
     t.string   "whodunnit"
     t.text     "object",         limit: 1073741823
     t.datetime "created_at"
+    t.integer  "transaction_id"
   end
 
   add_index "versions", ["item_type", "item_id"], name: "index_versions_on_item_type_and_item_id"
+  add_index "versions", ["transaction_id"], name: "index_versions_on_transaction_id"
 
 end