在 Django 中使用 context_processors.py 时，如何避免在登录页面上请求用户？

Question

I wanted to pass variables with the User information, that is linked to a Clients model through a OneToOneField to the django.contrib.auth.models , onto the base.html file.

So, I created a context_processors.py with the following code

from django.contrib.auth.models import User

    def userData(request):  
        user = request.user
        u = User.objects.get(username=user)
        us = u.clients.first_name
        uv = u.clients.avatar
        return {
            'u': u,
            'us': us,
            'uv': uv
        }

Everything was working fine, until I logged out.

When I try to login again, I get the accounts/login url and get a

DoesNotExist at /accounts/login/
User matching query does not exist.

Answer 1

Well your request.user is already a User , so it makes not much sense to fetch it again.

You can simply check if the user is logged in:

def userData(request):
    if :
        return {
            'u': request.user,
            'us': request.user.clients.first_name,
            'uv': request.user.clients.avatar,
        }
    return {}

Note : the name clients is plular , so that suggests a collection of Client s. Normally model names are singular (so Client instead of Clients ), and the related name of a OneToOneField should, if you specify it yourself, be singular as well.