Once we have some existing models there's very little we need to do to create the API.
Firstly create a resource for each model that defines which fields we want to expose on the model.
Secondly we map a base view and an instance view for each resource.
The generic views :class:`.ListOrCreateModelView` and :class:`.InstanceModelView` provide default operations for listing, creating and updating our models via the API, and also automatically provide input validation using default ModelForms for each model.
