Django ForeignKey null=True IntegrityError

Question

I am making a comment and reply system, where the comments should have parent as null in the database and the replies have the id of the parent comment. Below is my comment model, for your reference. When I am trying to post the comment via my form, I get IntegrityError . I tried putting both blank=True and null=True , but the error is still there. Also, I have figured out from the documentation and other articles that null=True should work, not blank=True . I cannot understand why I am getting the error and how to fix it. Thank you in advance.

class BlogComment(models.Model):
    sno= models.AutoField(primary_key=True)
    comment=models.TextField()
    user=models.ForeignKey(User, on_delete=models.CASCADE)
    post=models.ForeignKey(Post, on_delete=models.CASCADE)
    parent=models.ForeignKey('self', on_delete=models.CASCADE, null=True)
    timestamp= models.DateTimeField(default=now)

Answer 1

This was not working because of typo in the name attribute of my form input. I fixed that and now it is working.