[Zope3-dev] Missing ObjectContentModifiedEvent

[Jim Fulton]

Uwe Oestermeier wrote:
> Hi,
> 
> I'm working on a versioning system that creates a new version for each 
> changed file content.
> I tried to listen  to 
> zope.app.event.interfaces.IObjectContentModifiedEvents,
> but unfortunately no such event seems to be generated.
> 
> Editing an existing zope.app.file.File via the edit view leads only to 
> an ObjectModifiedEvent,
> uploading new content produces no object event at all.
> 
> Should this be fixed by generating ObjectContentModifiedEvents in both 
> cases (which I would prefer),

Yes.

> or should the less informative ObjectModifiedEvent be used? In the later 
> case, the misleading
> IObjectContentModifiedEvent should probably removed from the list of 
> objectevents.
> 
> In general, missing events are difficult to detect and I'm quite sure 
> that file editing and uploading
> are not the only relevant cases (e.g. WebDAV and FTP are other ways to 
> modify file contents).
> Wouldn't it be the best solution to generate an 
> IObjectContentModifiedEvent in the File._setData method and
> not the view classes?

I think this would be OK for this specific case.

What I don't want to see is some general implicit event-generation
scheme.

Jim

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