i use this code can crteate ,but someone say it can't create ,why ?

class LogText(db.Model):
    content = db.StringProperty(multiline=True)


class MyThread(threading.Thread):
    def __init__(self,threadname):
        threading.Thread.__init__(self, name=threadname)
    def run(self,request):
        log=LogText()
        log.content=request.POST.get('content',None)
        log.put()

def Log(request):
    thr = MyThread('haha')
    thr.run(request)

    return HttpResponse('')