小编LaM*_*Mut的帖子

这是我的model.py文件

...

class LinkFields(models.Model):
    link_external = models.URLField(
        "External link",
        blank=True,
        null=True,
        help_text='Set an external link if you want to describe the event from an other web site',
    )
    link_page = models.ForeignKey(
        'wagtailcore.Page',
        null=True,
        on_delete=models.SET_NULL,
        blank=True,
        related_name='+',
        help_text='Choose an existing page (event must have already been created)',
    )

    @property
    def link(self):
        if self.link_page:
            return self.link_page.url
        else:
            return self.link_external

    panels = [
        FieldPanel('link_external'),
        PageChooserPanel('link_page'),
    ]

    class Meta:
        abstract = True

class RelatedLink(LinkFields):
    title = models.CharField(max_length=255, help_text="Link title")

    panels = [
        FieldPanel('title'),
        MultiFieldPanel(LinkFields.panels, …