A common use case of forms is to subclass some type of base form and add a couple extra fields. Take the following base form for example:
The model has a variety of other fields in it so I’m using fields in the Meta class to limit to just these three. Now let’s add a couple fields in a subclass:
As you can see, rather than re-specifying all the fields in the Meta class I am simply adding the new fields to the parent’s existing field list.