Display user name in reference to user id in django template

Question

I expect this is an easy question. For some reason, I don't have a solution yet.

I have an object set from django reversion: version_list. Each object in the set has a user id attached to it. How do I grab the user names that correspond to the user ID's?

To try to be clearer, if each object in version_list has a name, date, and user id, how can I join the version_list set with the user table to figure out what user id goes with which name? This is done in the view, or the template?

Answer 1

I think you're looking for a simple template tag.

from django import template
from django.contrib.auth.models import User

register = template.Library()

@register.simple_tag
def get_username_from_userid(user_id):
    try:
        return User.objects.get(id=user_id).username
    except User.DoesNotExist:
        return 'Unknown'

Which you would use like:

{% for version in version_list %}
  {% get_username_from_userid version.user_id %}
{% endfor %}