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Comment by Noumenon72 | Hacker News Reader

I'm not sure I understand the different approaches being compared here. Are you opposing 1 and supporting 2?

  1. HatsService with methods .get_hats(), .throw_hats()  
  2. wearable_hats = db.query(Hats).map(hat => WearableHatDto(hat)
     throwable_hats = db.query(Hats).map(hat => ThrowableHatDto(hat)

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(2)-ish patterns are more what I have in mind, but note that as soon as you're expecting the same `db.query(hats)` to give you the data you need for both (1) and (2), you might already be pretty far down the wrong road.

I'm trying this right now and I don't get it. There's no difference between

    HatsService
        getWearableHats() { return db.query(Hats).toDto() } 
        getThrowableHats() { return db.otherQuery(Hats).toDto() }

and

    # wearable.py
    getWearableHats() { return db.query(Hats).toDto() }

    # throwable.py
    getThrowableHats() { return db.otherQuery(Hats).toDto() }

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