Creating a comment system

You will build a comment system wherein users will be able to comment on posts. To build the comment system, you need to do the following:

1. Create a model to save comments
2. Create a form to submit comments and validate the input data
3. Add a view that processes the form and saves a new comment to the database
4. Edit the post detail template to display the list of comments and the form to add a new comment

Building a model

First, let's build a model to store comments. Open the models.py file of your blog application and add the following code:

class Comment(models.Model):
    post = models.ForeignKey(Post,
                             on_delete=models.CASCADE,
                             related_name='comments')
    name = models.CharField(max_length=80)
    email = models.EmailField()
    body = models.TextField()
    created = models.DateTimeField(auto_now_add=True)
    updated = models.DateTimeField...