Возможно ли в создать это в модели?

class Post(models.Model):
    author=models.ForeignKey(User,on_delete=models.CASCADE,verbose_name='Автор',related_name='authort')
    text=models.TextField(verbose_name="Текст")
    create_date=models.DateTimeField(auto_now=True)
    #col=это количество  Likepost для этого поста
class Likepost(models.Model):
    author=models.ForeignKey(User,on_delete=models.CASCADE,verbose_name='Автор')
    post=models.ForeignKey(Post,on_delete=models.CASCADE,null=True,blank=True,related_name='Likes_post')
    class Meta:
        verbose_name="Лайк поста"
        verbose_name_plural="Лайки постов"

def user_directory_path(instance, filename):
    return 'files/aticleff_{0}/{1}'.format(instance.aticleff.id, filename)
class Files(models.Model):
    aticleff=models.ForeignKey(Articles,on_delete=models.CASCADE,related_name='files_articles')
    sfile=models.FileField('Файл',upload_to=user_directory_path)

class Post(models.Model):
    author=models.ForeignKey(User,on_delete=models.CASCADE,verbose_name='Автор',related_name='authort')
    text=models.TextField(verbose_name="Текст")
    create_date=models.DateTimeField(auto_now=True)
 
    def col(self):
        col = Likepost.objects.filter(post = self.pk).count()
        return col
 
class Likepost(models.Model):
    objects = models.Manager()
    author=models.ForeignKey(User,on_delete=models.CASCADE,verbose_name='Автор')
    post=models.ForeignKey(Post,on_delete=models.CASCADE,null=True,blank=True,related_name='Likes_post')
    class Meta:
        verbose_name="Лайк поста"
        verbose_name_plural="Лайки постов"

{% for post in posts %}
{{ post.col }}
{% endfor %}