forSelf

Map unprefixed destination members from a selected nested source model.

Auto-flattening maps item.name to itemName. Use forSelf() when the destination intentionally omits that prefix:

class CartItemDto {
  @AutoMap()
  name!: string;

  @AutoMap()
  price!: number;

  @AutoMap()
  quantity!: number;
}

createMap(
  mapper,
  CartItem,
  CartItemDto,
  forSelf(Item, (source) => source.item),
);

forSelf() creates or reuses mapping information from the nested Item model to the destination, then selects the nested source value at runtime.

You can provide an existing mapping instead of the nested source identifier:

const itemMapping = createMap(mapper, Item, CartItemDto);

createMap(
  mapper,
  CartItem,
  CartItemDto,
  forSelf(itemMapping, (source) => source.item),
);