Model Change with Schemaless Changesets

We’ve used changesets to model changes to data that is persisted in our database, but we can easily imagine scenarios in which we want to present the user with the ability to input data that isn’t persisted. Consider the following examples:

• A guest checkout experience in which a user inputs their billing and shipping info without saving it.
• A gaming UI in which a user provides a temporary username for the lifespan of the game.
• A search form in which input is validated but not saved.

All of these scenarios require presenting some interface to the user for collecting input, validating that input, and managing the results of that ...