NoReverseMatch when rendering page - django

Question

I seem to know where the issue is located since I can get around it, but for getting around it I have to sacrifice a function I really want to keep.
Here is the relevant code in the non-working state:
{% if sections %}
{% for item in sections %}
<a class="sections" href="{% url 'sections:generate' item.section.slug %}">{{ item.section.title }}</a>
{% for subsection in item.subsections %}
<p>{{ subsection.title }}</p>
{% endfor %}
{% endfor %}
{% else %}
<p>Error retrieving sections or no sections found</p>
{% endif %}
The problem part above is in the link tag. Let me explain by showing the related view.py:
def index(request):
sections = Section.objects.all()
context = {
'sections': [],
}
for section in sections:
context.get("sections").append(
{
'section': section,
'subsections': get_subsections(section),
}
)
return render(request=request, template_name='index.html', context=context)
So, 'sections' is an iterable list of items, containing for every items a dictionary with two entries. One, 'section' and one 'subsection'. There are multiple subsections for every section, this is what I really want to accomplish.
Ordinarily, when not bothering with subsections and simply iterating over a list of sections works fine. The template code for that would look something like:
{% for section in sections %}
{{ section.title }}
{% endfor %}
NOTE! The code above works just fine! But as soon as I add 'sections' as a list of dictionaries and have to reference the slug by item.section.slug the pages stop rendering.
Please advise.

Answer 1

Try using tuples:
View:
context['sections'] = [(section, tuple(get_subsections(section))) for section in sections]
Template:
{% for section, subsections in sections %}
<a class="sections" href="{% url 'sections:generate' section.slug %}">{{ section.title }}</a>
{% for subsection in subsections %}
<p>{{ subsection.title }}</p>
{% endfor %}
{% endfor %}