Fixes category filter

Author: ajrbyers

templates/books/categories.html

@@ -34,7 +34,7 @@ <h2>Categories</h2>
                             <tbody>
                             {% for category in categories %}
                                 <tr>
-                                    <td>{{ category.name }}</td>
+                                    <td><a href="{% url 'books_index_category' category.slug %}" target="_blank">{{ category.name }} <i class="fa fa-external-link" aria-hidden="true"></i></a></td>
                                     <td>{{ category.book_set.count }}</td>
                                     <td><a href="{% url 'books_edit_category' category.pk %}"
                                            class="button secondary small">Edit</a></td>

views.py

@@ -24,7 +24,7 @@ def index(request, category_slug=None):
             models.Category,
             slug=category_slug,
         )
-        books.filter(category=category)
+        books = books.filter(category=category)
 
     template = 'books/index.html'
     context = {