change complaint serialization

app/models/complaint.rb

@@ -2,8 +2,12 @@ class Complaint
   include ActiveModel::Model
   include OrientDbSerializable
 
-  attr_accessor :user, :object, :message, :description
-  validates_presence_of :user, :object, :message
+  attr_accessor :user, :object, :message, :description, :created_at
+  validates_presence_of :user, :object, :message, :created_at
+
+  def initialize(params={})
+    super(params.merge(defaults))
+  end
 
   def self.copyrights
     ComplaintMessage.new("Objeto viola direitos autorais")
@@ -22,6 +26,19 @@ class Complaint
   end
 
   def to_orientdb_hash
-    super.merge("user" => @user.rid, "object" => @object.id, "message" => @message.to_s)
+    super.merge("message" => @message.to_s)
+  end
+
+  private
+
+  def excluded_orientdb_properties
+    ['user', 'object', '@class']
+  end
+
+  def defaults
+    {
+        created_at: DateTime.now.strftime("%Y-%m-%d %H:%M:%S")
+    }
   end
+
 end

test/models/complaint_test.rb

@@ -10,10 +10,11 @@ class ComplaintTest < ActiveSupport::TestCase
         user: User.new(rid: '#14:15'),
         object: LearningObject.new(id: '#16:43'),
         message: Complaint.copyrights,
-        description: 'teste'
+        description: 'teste',
+        created_at: DateTime.now.strftime("%Y-%m-%d %H:%M:%S")
     )
 
-    expected_hash = {"@class" => "Complaint", "user" => complaint.user.rid, "object" => complaint.object.id, "description" => complaint.description, "message" => complaint.message.to_s}
+    expected_hash = {"created_at" => complaint.created_at.to_s, "description" => complaint.description, "message" => complaint.message.to_s}
     assert_equal(expected_hash, complaint.to_orientdb_hash)
   end