Like button is not working. Here is my code please check it gives error:- cannot assign "'3'": "likepost.post_id" must be a "post" instance.

view.py

def like_post(request):
    user_id = request.user.username
    post_id = request.GET.get('post_id')
    post = Post.objects.get(id=post_id)

    like_filter =LikePost.objects.filter(post_id=post_id,username=user_id).first()

    if like_filter == None:
        new_like = LikePost.objects.create(post_id=post_id, username=user_id)
        new_like.save()
        post.no_of_likes = post.no_of_likes+1
        post.save()
        return redirect('showpost.html')
    else:
        like_filter.delete()
        post.no_of_likes = post.no_of_likes-1
        post.save()
        return redirect('showpost.html')



model.py

class LikePost(models.Model):
    post_id = models.ForeignKey(Post,on_delete=models.CASCADE, null=True)
    user_id = models.ForeignKey(User,on_delete=models.CASCADE, null=True)

HTML FILE:

<div class="flex space-x-4 lg:font-bold col-lg-6 d-flex flex-wrap mt-2">

   <a href="/like-post?post_id={{post.id}}" class="flex items-center space-x-2">

      <div class="p-2 rounded-full text-black  d-flex">

       <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 20 20" fill="currentColor" width="25" height="25" class="">

         <path d="M2 10.5a1.5 1.5 0 113 0v6a1.5 1.5 0 01-3 0v-6zM6 10.333v5.43a2 2 0 001.106 1.79l.05.025A4 4 0 008.943 18h5.416a2 2 0 001.962-1.608l1.2-6A2 2 0 0015.56 8H12V4a2 2 0 00-2-2 1 1 0 00-1 1v.667a4 4 0 01-.8 2.4L6.8 7.933a4 4 0 00-.8 2.4z" />

       </svg>

    {% if post.no_of_likes == 0 %}
     <p class="mb-0">No likes</p>
    {% elif post.no_of_likes == 1 %}
    <p>Liked by {{post.no_of_likes}} person</p>
    {% else %}
    <p>Liked by {{post.no_of_likes}} people</p>
    {% endif %}
     </div>
  </a>
</div>