models.py 文件源码

def ensure_slug(self, dbsession) -> str:
        """Make sure post has a slug.

        Generate a slug based on the title, but only if blog post doesn't have one.

        :return: Generated slug as a string
        """

        assert self.title

        if self.slug:
            return

        for attempt in range(1, 100):

            generated_slug = slugify(self.title)
            if attempt >= 2:
                generated_slug += "-" + str(attempt)

            # Check for existing hit
            if not dbsession.query(Post).filter_by(slug=generated_slug).one_or_none():
                self.slug = generated_slug
                return self.slug

        raise RuntimeError("Could not generate slug for {}".format(self.title))