Django: how to pass same data to different views?

Question

Django

Sorry for the uninformative title, it's hard to convey the whole essence of the issue in one line.
I recently started learning Django and to hone my knowledge, I'm trying to create a small engine for a certain system, or, as it's fashionable to say now: I'm creating a web application.
Now I'll get to the point. Each user has a "balance" in the system and it must be constantly visible to authorized users, regardless of which page the user is on.
For example, we have 2 views (view), let's call them buy and sell (buy and sell). Each view executes a certain code, "calls" the template (template) and passes various data to it (the template). I need the user's balance to be included in the templates without fail. How can I do that? The first thing that comes to mind is to call a function for each view that would return the balance. Like this:

def buy(request):
    balance = get_balance();
    return render_to_response("buy.html",{'balance':balance});
def sell(request):
    balance = get_balance();
    return render_to_response("sell.html",{'balance':balance});

This method can be quite efficient, but somehow it looks wrong and ugly. How can you solve this problem? On the Web, I found something that, in theory, can solve the problem - middleware , but I did not find much use cases on this topic on the Internet.
Please advise how best to solve the problem.

Answer 1

Turn on the middleware to inject the request into the template

MIDDLEWARE_CLASSES = (
    'django.contrib.sessions.middleware.SessionMiddleware',

in the template we request information about the user
<h2>{{ request.user.get_ballance() }}