python - 使用 ._meta Django

Question

我想问一下这段代码中._meta的使用？我没有找到解释 .meta 用法的文档

def resend_activation_email(self, request, queryset):
    """
    Re-sends activation emails for the selected users.

    Note that this will *only* send activation emails for users
    who are eligible to activate; emails will not be sent to users
    whose activation keys have expired or who have already
    activated.

    """
    if Site._meta.installed:
        site = Site.objects.get_current()
    else:
        site = RequestSite(request)

    for profile in queryset:
        if not profile.activation_key_expired():
            profile.send_activation_email(site)
resend_activation_email.short_description = _("Re-send activation emails")

Answer 1

_meta 顾名思义就是存储模型的元数据。比如，您想遍历模型的所有字段，那么您可以使用 model._meta.get_fields()。

顺便说一下，元选项在文档中有介绍——

Model Meta options documentation