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A famous Beatles song starts with “One, two, three, four; No one I think is in my tree”. Could that have been a database reference? Ah, I suppose it’s nothing to get hung on. In this quest, you will practice a common task most developers are required to do frequently: adding a new field to an existing data model, migrating old data to the updated model, and supporting the new field in the UI and the API. Let me take you down.
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