views.py 文件源码

def event_does_not_exist( request, event_id, redirect_url ): # {{{1
    """ if event_id was deleted it shows event redirection or deleted page,
    otherwise raises 404 """
    try:
        deleted_version = reversion.get_deleted(Event).get(object_id=event_id)
    except Version.DoesNotExist:
        raise Http404
    revision_meta = deleted_version.revision.revisioninfo_set.all()
    assert( len( revision_meta ) == 1 )
    redirect = revision_meta[0].redirect
    if redirect:
        messages.info( request,
                _( u'redirected from deleted event %(event_nr)s' ) % \
                        {'event_nr': event_id} )
        return HttpResponseRedirect( reverse( redirect_url,
            kwargs = {'event_id': redirect,} ) )
    else:
        messages.info( request,
            _('You have tried to access an event which has been deleted.'))
        return HttpResponseRedirect( reverse(
            'event_deleted', kwargs = { 'event_id': event_id } ) )