Make model optional

Consider two levels of development.

1. A new developer wants to do some basic stuff but with a little extra, maybe input first name, input surname, and then an output. The form element gives you one model, one instance, one submission. Not taking the instance out of the model.

2. Then gradually introduce the MVC model. If you're loading an instance from another location, then at that point you need the model element.

Example simple form

Example simple form with model overrides