old_contents: #!/usr/bin/env python
  # -*- coding: utf-8 -*-
  from django.forms import ModelForm
  from blog.models import BlogPost
  
  
  class MomentForm(ModelForm):
      class Meta:
          model = BlogPost
          fields = '__all__'
  
new_contents: #!/usr/bin/env python
  # -*- coding: utf-8 -*-
  from django.forms import ModelForm
  from blog.models import BlogPost
  from django import forms
  
  
  class BlogPostForm(ModelForm):
      class Meta:
          model = BlogPost
          # fields = '__all__'
          exclude = ('timestamp',)
subject: add form class