Creating forms from models

We need to build a form to let users comment on blog posts. Remember that Django has two base classes that can be used to create forms: Form and ModelForm. We used the Form class to allow users to share posts by email. Now we will use ModelForm to take advantage of the existing Comment model and build a form dynamically for it.

Edit the forms.py file of your blog application and add the following lines:

from .models import Comment
class CommentForm(forms.ModelForm):
    class Meta:
        model = Comment
        fields = ['name', 'email', 'body']

To create a form from a model, we just indicate which model to build the form for in the Meta class of the form. Django will introspect the model and build the corresponding form dynamically.

Each model field type has a corresponding default form field type. The attributes of model fields are taken into account for form validation. By default, Django creates a form field for each field...