Update views.py

website/views.py

@@ -38,7 +38,7 @@ def add_comment(post_id):
     if post:
         comment_content = request.form.get('comment')
         if comment_content and len(comment_content) >= 1:
-            new_comment = Comment(comment_content=comment_content, user_id=current_user.user_id, post_id=post_id)
+            new_comment = Comment(comment_content=comment_content, user_id=current_user.username, post_id=post_id)
             db.session.add(new_comment)
             db.session.commit()
     return redirect(request.referrer or url_for('views.home'))