Django - Can two or more templates be extended by one template?

Question

Let's say there are base_a.html, base_b.html, a.html, b.html, c.html.

a.html extends base_a.html and b.html extends base_b.html.
And c.html has to extend both base_a.html and base_b.html.

It will be easier to understand this situation if you think base_a.html contains reply functionalities and base_b.html contains search functionalities.

Can I use multiple inheritance in Django template?
Or do I have to use include instead of extends?

Answer 1

As stated at the docs,

If you use {% extends %} in a template, it must be the first template tag in that template.

That suggests that an {% extends %} tag cannot be placed in the second line, that is, you cannot have two {% extends %} tags.

Your case can easily be solved with {% include %} tags. For example:

In a.html:

{% include 'base_a.html' %}

In b.html:

{% include 'base_b.html' %}

In c.html:

{% include 'base_a.html' %}
{% include 'base_b.html' %}

Of course, base_a.html and base_b.html should only contain the specific block you want to reuse, not a full HTML template.