adding OrientDbSerializable module in collection model

app/models/collection.rb

 class Collection
   include ActiveModel::Model
+  include OrientDbSerializable
   include RepositoriesProxy
   attr_accessor :id, :created_at, :last_modified, :name, :description, :privacy,
                 :owner, :learning_objects
@@ -42,7 +43,15 @@ class Collection
     !@name.blank?
   end
 
-  private
+  #def to_orientdb_hash
+  #
+  #end
+
+  protected
+
+  def excluded_orientdb_properties
+    ['owner']
+  end
 
   def defaults
     {

app/models/concerns/orient_db_serializable.rb

@@ -20,6 +20,8 @@ module OrientDbSerializable
     hash
   end
 
-  def excluded_orientdb_properties; end
+  def excluded_orientdb_properties
+    []
+  end
 
 end
\ No newline at end of file

app/repositories/orient_db/collection_repository.rb

@@ -4,10 +4,6 @@ module OrientDb
     include OrientDb::Methods::FinderMethods
     include RepositoriesProxy
 
-    def build_object(args={})
-      CollectionBuilder.build_from_orientdb args
-    end
-
     def save_learning_objects(collection = Collection.new)
       if collection.id.to_s.empty?
         raise NotPersistedRecordError, 'Before save learning objects to collection, you must persist using CollectionRepository::create method'
@@ -116,7 +112,11 @@ module OrientDb
       update_property(collection, 'privacy', privacy) if privacy_accepted?(privacy)
     end
 
-    private
+    protected
+
+    def build_object(args={})
+      CollectionBuilder.build_from_orientdb args
+    end
 
     def accepted_properties
       ['privacy']

test/models/collection_test.rb

@@ -31,4 +31,25 @@ class CollectionTest < ActiveSupport::TestCase
     assert_count 1, collection.learning_objects
   end
 
+  test 'serialize collection for orientdb' do
+    collection = Collection.new(name: 'Minha coleção de teste')
+    assert_equal(build_collection_hash(collection), collection.to_orientdb_hash)
+    #collection.add LearningObject.new(id: '#43:34')
+    #collection.add LearningObject.new(id: '#43:53')
+    #assert_equal({"@class" => "Collection", "created_at" => "2015-11-18 16:10:52", "last_modified" => "2015-11-18 16:10:52", "learning_objects" => ['#43:34', '#43:53'], "privacy" => "private", "name" => "Minha coleção de teste"}, collection.to_orientdb_hash)
+  end
+
+  private
+
+  def build_collection_hash(collection)
+    {
+        "@class" => "Collection",
+        "created_at" => collection.created_at,
+        "last_modified" => collection.last_modified,
+        "learning_objects" => [],
+        "privacy" => collection.privacy,
+        "name" => collection.name
+    }
+  end
+
 end
\ No newline at end of file

test/models/learning_object_test.rb

@@ -13,7 +13,7 @@ class LearningObjectTest < ActiveSupport::TestCase
         thumbnail: '/asdasdasd.jpg',
         id_dspace: '123213',
         type: 'image',
-        file: LearningObject::Attachment.new('[{"id":2203,"name":"Pontociencia_Efe_chamas_na_horizontal.flv","type":"bitstream","link":"/rest/bitstreams/2203","bundleName":"ORIGINAL","description":null,"format":"Unknown","mimeType":"application/octet-stream","sizeBytes":4108209,"parentObject":null,"retrieveLink":"/bitstreams/2203/retrieve","checkSum":{"value":"43bd43bea944dcb8708d6ec708fb510d","checkSumAlgorithm":"MD5"},"sequenceId":-1,"policies":null,"expand":["parent","policies","all"]}]'),
+        attachment: LearningObject::Attachment.new('[{"id":2203,"name":"Pontociencia_Efe_chamas_na_horizontal.flv","type":"bitstream","link":"/rest/bitstreams/2203","bundleName":"ORIGINAL","description":null,"format":"Unknown","mimeType":"application/octet-stream","sizeBytes":4108209,"parentObject":null,"retrieveLink":"/bitstreams/2203/retrieve","checkSum":{"value":"43bd43bea944dcb8708d6ec708fb510d","checkSumAlgorithm":"MD5"},"sequenceId":-1,"policies":null,"expand":["parent","policies","all"]}]'),
         last_modified: '2015-03-10 15:33:45',
         metadata: []
     )