Model

Model

A model (document / DTO) is the persistence shape of your data — how a record looks in the database. It's kept separate from the domain Entity so storage concerns never leak into your business model; a Mapper converts between them. Write it by hand in the feature's data/ folder:

// data/character.dto.ts — the MongoDB document shape
export interface CharacterDocument {
  _id: string;
  name: string;
  universe: string;
  alignment: string;
  createdAt: Date;
  updatedAt: Date;
}

Entity vs Model

	Entity	Model (document/DTO)
Layer	domain/	data/
Purpose	business rules + behavior	storage shape
Knows the DB?	no	yes (e.g. _id)
Defined as	class	interface / type