Creating a comment system

We will continue extending our blog application with a comment system that will allow users to comment on posts. To build the comment system, we will need the following:

• A comment model to store user comments on posts
• A Django form that allows users to submit comments and manages the data validation
• A view that processes the form and saves a new comment to the database
• A list of comments and the HTML form to add a new comment that can be included in the post detail template

Creating a model for comments

Let’s start by building a model to store user comments on posts.

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()
...