password_expiry.py 文件源码

def user_pre_save(sender, instance=None, raw=False, **kwargs):
    user = instance
    attrs = ExpirySettings.get()
    # We're saving the password change date only for existing users
    # Users just created should be taken care of by auto_now_add.
    # This way we can assume that a User profile object already exists
    # for the user. This is essential, because password change detection
    # can happen only in pre_save, in post_save it is too late.
    is_new_user = user.pk is None
    if is_new_user or raw:
        return
    if attrs.date_changed:
        update_date_changed(user, attrs.date_changed)

    # User has been re-activated. Ensure the last_login is set to None so
    # that the user isn't inactivated on next login by the AccountExpiryBackend
    current_user = sender.objects.get(pk=user.pk)
    if not current_user.is_active and user.is_active:
        user.last_login = None