old_contents: from .models import BlogPost
  from django import forms
  
  class BlogPostForm(forms.ModelForm):
      class Meta:
          model = BlogPost
          exclude = ('user',)
  
new_contents: from .models import BlogPost, Comment
  from django.forms import ModelForm
  
  class BlogPostForm(ModelForm):
      class Meta:
          model = BlogPost
          exclude = ('user',)
  
  class CommentForm(ModelForm):
      class Meta:
          model = Comment
          exclude = ('post',)
  
subject: Add the form for Comment