change author in learning object show

app/views/learning_objects/show.html.erb

@@ -24,15 +24,14 @@
 
   <div class="col-md-5">
     <div class="rightbar">
-      <% author = @learning_object.get_metadata_value_of("dc.contributor.author") %>
-      <% unless author.blank? %>
+      <% unless @learning_object.author.blank? %>
         <div class="media">
           <div class="media-left">
             <a href="#"><img class="user-image-small" src="<%#= current_user.avatar.url(:thumb) %><%= asset_path('user-anon.png')%>" alt="Foto do usuário"/></a>
           </div>
           <div class="media-body">
             <h5>Autor</h5>
-            <h3><%= author %></h3>
+            <h3><%= @learning_object.author %></h3>
           </div>
         </div>
       <% end %>
@@ -130,7 +129,7 @@
             <div class="row">
               <div class="col-sm-12">
                 <ul>
-                  <li><b>Autor:</b> <%= @learning_object.get_metadata_value_of("dc.contributor.author") %></li>
+                  <li><b>Autor:</b> <%= @learning_object.author %></li>
                   <li><b>Tipo:</b> <%= @learning_object.get_metadata_value_of("dc.type") %></li>
                   <li><b>Data:</b> <%= @learning_object.get_metadata_value_of("dc.date.available") %></li>
                   <li><b>Linguagem:</b> <%= @learning_object.get_metadata_value_of("dc.language") %></li>