django笔记

django.contrib.humanize  提供一些个性化的模板过滤器

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用户名称后台验证，正则表达式验证：

alphanumeric = RegexValidator(r'^[0-9a-zA-Z\_]*$', 'Only alphanumeric characters and underscore are allowed.')

        try:
            alphanumeric(username)
        except:
            messages.add_message(request, messages.WARNING,_('username can only contain letters digits and underscore'))
            return HttpResponseRedirect(reverse('reg'))