How to properly break a template in Django?

Question

Django

Hello.
I have base template base and many other pages that extend base.
In the view, I do my own logic for each page, I render, everything is fine,
but in the base template there is a sidebar visible on all pages, which counts the number of all products, but
I can only transfer logic for one page.
How can I make the logic for the base template or still pass data for the sidebar in each template?

Answer 1

You can define your own TEMPLATE_CONTEXT_PROCESSORS and logic in it

Answer 2

Why such difficulties. Make your templatetag
docs