[Zope3-dev] Re: [Checkins] SVN: zope.schema/trunk/ More work on bug 98287: Introduced an event to signal that an object value is

[Tres Seaver]

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Stephan Richter wrote:
> On Sunday 08 July 2007 13:19, Tres Seaver wrote:
>> I don't see how that can be:  'zope.event' hsa no dependencies[1], and
>> provides a service which is at least as low-level (lower, in my opinion)
>> as 'zope.schema':  I can imagine *lots* of Zope3-based applications
>> which do not use zope.schema, but *none* which don't use zope.event,
>> zope.interface, and zope.component.
> 
> z3c.rml does not use zope.component and thus clearly not zope.event.

I don't know why "clearly":  'zope.event' is a simple event channel
notification model, which has no dependency on components at all.
The application is free to do subscriptions in Python without any of the
rest of the architecture at all.

If anything, I would argue that schema's dependency on i18nmessageid is
a wart, at least as a hard dependency.

Using schema, but not component, has to be a one-percent case among
Zope3 applications, I would think.  You likely don't even want
interface, in this case, since you aren't dispatching vies or adapters
against your schemas.


Tres.
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Tres Seaver          +1 540-429-0999          tseaver at palladion.com
Palladion Software   "Excellence by Design"    http://palladion.com
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