Django template conditional variable assignment

Question

I want to assign a variable do different values depending on if a variable exists, is this possible? My non working example might make it clearer:

{% if user         


        

Answer 1

Template tag:

@register.assignment_tag
def alias(obj):
    """
    Alias Tag
    """
    return obj

Template:

{% alias sorted_users.0.username as menu_user %}