[Answer]-Dynamic names as first-level URL path objects in Django

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There is no need to involve urls in this case (if I understand what you are doing correctly).

Just use something like this instead (assuming Django 1.5 or higher):

from django.contrib import auth

def clean_username(username):
    url = urlresolvers.reverse('your_view_name', kwargs=dict(username=username))
    match = urlresolvers.resolve(url)
    if match.view_name != 'your_view_name':
        raise ValidationError(_(
            u'This username does not create a valid URL.  Please choose another'))

    if auth.get_user_model().objects.filter(username__iexact=username):
        raise ValidationError(_(u'There is already a user with this username'))

    return username
👤Wolph

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