models.py 文件源码

def save(self, *args, **kwargs):
        same_slug = True
        counter = 1
        while same_slug:
            same_slug = Post.objects.filter(slug=self.slug)
            if same_slug:
                self.slug += '_' + str(counter)
                counter += 1
            else:
                break
        self.short_content = strip_tags(self.content)[:100] + "..."
        super(Post, self).save(*args, **kwargs)