Custom global permissions for Django v1.7.x without model

django_register_application_permissions

"""
    Registers any number of application permissions without model

    Examples:

    # .../project/app/models.py
    from django.apps import apps

    register_application_permissions(
        (
            ('can_reboot_server', 'Can Reboot Server',),
        ),
        apps.get_app_config('app_name'))

    # .../project/app/views.py
    if not request.user.has_perm('app.can_reboot_server'):
        return HttpResonseRedirect(login_url)

    To synchronize all permissions with database run the following:
    # ./manage.py migrate


"""
def register_application_permissions(permissions, sender):
    from django.contrib.auth.models import Permission
    from django.contrib.contenttypes.models import ContentType
    from django.db.models import signals

    def _sync_permissions(permissions, app, verbosity):

        if verbosity >= 2:
            print "Synchronize '%s' application permissions" % app.label

        # create content type
        content_type, created = ContentType.objects.get_or_create(model='',
            app_label=app.label,
            defaults={'name': app.label})
        if created and verbosity >= 2:
            print "Content type '%s' has been created" % content_type.name

        # create permissions
        for codename, name in permissions:
            perm, created = Permission.objects.get_or_create(codename=codename,
                content_type__pk=content_type.id,
                defaults={'name': name, 'content_type': content_type})
            if created and verbosity >= 2:
                print "Permission '%s' has been created" % perm.codename

    def _post_migrate_receiver(sender, **kwargs):
        _sync_permissions(permissions, sender, kwargs.get('verbosity', 0))

    signals.post_migrate.connect(_post_migrate_receiver, sender=sender, weak=False)