[Answered ]-Tango with django chapter 19 — Adding Inline Category Suggestions

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You made a typo, this is the first thing to check when coding and specifically with django templates because unbound variables don’t raise an error.

cats.html

{% if cats %}
    <ul class="nav nav-sidebar">
        {% for c in cats %}
            {% if c == act_act %} <li class="active"> {% else %} <li>{% endif %}
                <a href="{% url 'category' c.slug %}">{{ c.name }}</a></li>
        {% endfor %}
{% else %}
        <li><strong>There are no category present.</strong></li>
    </ul>
{% endif %}

cats should be cat_list. There is not act_act variable passed to the template.

Also I recommend you avoid small variable names. Instead of cats use categories instead of act_act use active or better active_category. Instead of c which is not readable, use category. This makes the code more readable not only because the names are longer but because you don’t require the cognitive load to translate terse/cryptic words to english.

I use plural names even with english words that pluralize with only an s. This might sound prone to errors and typos but actually it’s ok, e.g. given the variable token (and not tok), I’ll name tokens a list or set of token.

👤amirouche

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