On 19 June 2012 19:54, Claudiu Saftoiu <csaft...@gmail.com> wrote:
> That is, a function called whenever the object is loaded, that does all the
> necessary backwards-compatibility
> work right there. It separates the backwards-compat code cleanly, and also
> only updates the objects
> as-needed... though still a minor performance hit as it does the check each
> time the object is loaded.
> Is there a way to do that last option? What's the best practice for this
> sort of thing, in general?

You'll need to override ``__new__``. That's your hook. It's called
when the database instantiates the object. Note that this is always
true for Python. The ``__new__`` method is always called before an
object is instantiated.

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