fixed bug-40, when adding author/<id>/books route, to edit_id.html, I assumed object existed, when creating it did not, now fixed

templates/edit_id_name.html

@@ -33,7 +33,9 @@
 {% endblock main_content %}
 
 {% block script_content %}
+{% if object %}
 <script>
     $.get( "/author/{{object.id}}/books", function(data) { $('#books_by_author').html(data) } );
 </script>
+{% endif %}
 {% endblock script_content %}