> -----Original Message-----
> From: [email protected] [mailto:[EMAIL PROTECTED] On
> Behalf Of Ted Gifford
> Sent: Monday, October 27, 2008 7:40 PM
> To: [email protected]
> Subject: [Trac-dev] Re: Elixir and Trac
>
>
>
> On Mon, Oct 27, 2008 at 6:12 PM, Noah Kantrowitz <[EMAIL PROTECTED]>
> wrote:
>
>
>
> This shares all the same downsides as the existing SA branch.
> Using an ORM
> provides very little tangible benefit
>
>
> Database independence seems to be fairly tangible to some on the list.
> That is one thing that comes nearly free with ORM.
No, this comes free with writing standards compliant SQL. The DBI part that
we need is just bridging across the Python SQL libraries and normalizing a
few things (paramstyle, Unicode handling). We already do this for a few DBs,
just would save us some trouble. Really for that you could just implement an
SA plugin, which I would personally like to see.
>
> for non-trivial overhead [and] general obfuscation.
>
>
> agreed. ORM should not be thrown at every problem.
>
>
> The idea of using SA was always just to use it as a cross-DB
> API, not as an ORM as far as I remember. Really the only benefit
> is some of
> the common operations in the model classes are autogenerated, but
> those are
> a) only written once per model anyway, b) easy to cut-n-paste
> from another
> model, and c) don't change often enough to warrant this kind of
> complication.
>
>
>
> In this case I think of complication in two ways: the complication of
> the entire system, versus the complication of the testable parts. If
> you are able to make parts of your system easier to test with ORM, it
> can be a net positive in the complication realm.
How does autogenerating models make testing any easier? I suppose we could
avoid testing some of the basic SELECT calls, but that stuff isn't the hard
part to test anyway.
> And for a) and b), code generation provides a single template to
> maintain that code in.
And the point was that template isn't needed because writing it each time is
fine.
--Noah
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