Is there a way to pass a variable to an 'extended' template in Django?

Question

I want to add some flexibility to my layout template, but I can't find any way to do so.

I'm looking for a way to extend my layout template with variable, i.e. to pass a variable up in the template tree, not down.

# views.py def my_view_func(request):     return render(request, "child.html") 

---

# child.html {% extends 'layout.html' with show_sidebar=True sidebar_width_class="width_4" %}  <div>Templates stuff here</div> 

---

# layout.html {% if show_sidebar %}     <div class="{{ sidebar_width_class }}">         {% block sidebar %}{% endblock %}     </div> {% endif %} 

I have to maintain four templates with a difference in a few lines of code. For example, I have two templates that differ from each other by a sidebar width class. Am I doing something wrong?

Answer 1

I suspect that block is what you are looking for in the first place.

Form your block inside the base template like this:

{% block sidebar_wrapper %}     {% if sidebar %}     <div class="width{{sidebar_width}}">         {% block sidebar %}{% endblock %}     </div>     {% endif %} {% endblock sidebar_wrapper%} 

And on your child template:

{% extends 'layout.html' %} {% block sidebar_wrapper %}     {% with sidebar=True sidebar_width=4 %}         {{ block.super }}     {% endwith%} {% endblock sidebar_wrapper%} 

Answer 2

What you need is an include template tag. You can include a template in another template and render that with specific context.

{% include 'layout.html' with sidebar=True sidebar_width=4 %} 

Check docs here: https://docs.djangoproject.com/en/2.2/ref/templates/builtins/#include