Re: Simple useful events

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On Tue, 2006-29-08 at 13:57 +0200, Jean Jordaan wrote:
> > 'WeAreSorryWeShouldHaveKnownBetterThanToDesignOurSystemAroundPrematureO=
bjectCreation
>=20
> Hehe. This makes we wonder whether object creation *in a temp folder* mig=
ht
> raise a different event, or an additional one. So that it's possible to
> subscribe only to the creation of objects that will persist.

Here is what should technically happen when creating a new instance of a
content type that uses portal_factory.

1. Object is created in temp folder via portal_factory.
IObjectCreatedEvent should be fired.

2. Object is modified and saved (which is what Plone considers to be
created in this case).  IObjectModifiedEvent should be fired.

The sane approach would probably in #2 be to create a new event class
that extends IObjectModifiedEvent, probably call it
IArchetypeFirstModifiedEvent and fire that instead.  In my mind that
would solve the "what the world should expect to happen" use case and
the "but we're in plone, this is really when the object was first
created" use case us plone weenies expect.

While we're at it, we should probably define IArchetypeCreatedEvent and
IArchetypeModifiedEvent and fire those too.

But, I intentionally didn't try doing any of this for AT 1.4.  I think
the simple quick fix now for AT 1.4 would be to replace my
IObjectCreatedEvent with an IObjectModifiedEvent call and then perhaps
for AT 1.5 we can do it right.

What do you all think?

- Rocky

--=20
Rocky Burt
ServerZen Software -- http://www.serverzen.com
News About The Server (blog) -- http://www.serverzen.net


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