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Asked: 2026-05-13T20:16:35+00:00

Simple question for which I think I have an answer but I am looking

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Simple question for which I think I have an answer but I am looking for a sounding board. Should the DAL be the one translating whatever comes from the database (be it through straight SQL, stored procedures, ORM, whatever) into Domain Entities as understood by the business layer?
On a separate note, should all Domain Entities be defined by an Interface (if nothing else, to minimize dependencies) ?

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  1. Editorial Team

    Should the DAL be the one translating
    whatever comes from the database (be
    it through straight SQL, stored
    procedures, ORM, whatever) into Domain
    Entities as understood by the business
    layer?

    In my opinion, yes. I’m not sure there is a hard and fast rule though.

    On a separate note, should all Domain
    Entities be defined by an Interface
    (if nothing else, to minimize
    dependencies) ?

    In my opinion, no. That may end up in a lot of interfaces that add no value. YAGNI.

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