</div>
<div class="col-md-4">
- W katalogu:
- {{ book.catalogue_book }}
+ {% with cbook=book.catalogue_book %}
+ {% if cbook %}
+ W katalogu:
+ <a href="{% url 'catalogue_book' cbook.slug %}">{{ cbook }}</a>
+ {% endif %}
+ {% endwith %}
</div>
</div>
</div>