Update schema of LearningObject

app/models/learning_object.rb

 class LearningObject
   include ActiveModel::Model
 
-  attr_accessor :id, :id_dspace, :title, :description, :date_creation,
-                :thumbnail, :metadata
+  attr_accessor :id,
+                :name, :description, :thumbnail, :date_creation, :last_modified,
+                :id_dspace, :type, :bitstreams, :metadata
   attr_accessor :likes, :views
 
+  def initialize args
+    @id = args[:id]
+
+    @name = args[:name] || ''
+    @description = args[:description] || ''
+    @thumbnail = args[:thumbnail] || ''
+    @date_creation = args[:date_creation] || ''
+
+    @id_dspace = args[:id_dspace] || ''
+    @type = args[:type] || ''
+    @bitstreams = args[:bitstreams] || []
+    @metadata = args[:metadata] || []
+    @last_modified = args[:last_modified] || ''
+  end
+
   def subjects
     @subjects ||= learning_object_repository.get_subjects(self)
   end
 
+  def get_metadata_value_of key
+    values = @metadata.select { |v|  v["key"] == key }
+    unless values.empty?
+      return values.first["value"]
+    end
+  end
+
   private
 
   def learning_object_repository