On Tue, 2010-05-04 at 11:17 -0700, Sam Brauer wrote:
> > From: Chris McDonough <chr...@plope.com>
> > To: Sam Brauer <sampbra...@yahoo.com>
> > Cc: repoze-dev@lists.repoze.org
> > Sent: Mon, May 3, 2010 11:37:15 PM
> > Subject: Re: [Repoze-dev] Folder event subscriber not called
> >
> > On Mon, 2010-05-03 at 23:33 -0400, Chris McDonough wrote:
> > > Hi Sam,
> > >
> > > The events sent by repoze.folder are "object events", which are events
> > > dispatched based on *two* interfaces (the context interface and the
> > > event interface). Here's an example from KARL:
> > >
> > > <subscriber
> > > for="repoze.lemonade.interfaces.IContent
> > > repoze.folder.interfaces.IObjectAddedEvent"
> > > handler=".subscribers.index_content"/>
> > >
> > > Hopefully this helps,
> >
> > Sorry, I should have also provided the "subscribers.index_content"
> > function so you could see its argument list:
> >
> > def index_content(obj, event):
> > """ Index content (an IObjectAddedEvent subscriber) """
> > catalog = find_catalog(obj)
> > if catalog is not None:
> > for node in postorder(obj):
> > if is_content(obj):
> > path = model_path(node)
> > docid = getattr(node, 'docid', None)
> > if docid is None:
> > docid = node.docid = catalog.document_map.add(path)
> > else:
> > catalog.document_map.add(path, docid)
> > catalog.index_doc(docid, node)
> >
>
>
> Chris,
> Thanks for clarifying the "object event" style of subscribers. I saw them in
> some example code and tried that approach too without success.
> If I modify my example such that my Content class implements an IContent
> interface and my subscriber_test function takes object and event arguments,
> models.py contains:
Hi Sam,
Modify your run.py so that its app function calls "hook_zca" ala:
def app(global_config, **settings):
""" This function returns a WSGI application.
It is usually called by the PasteDeploy framework during
``paster serve``.
"""
zodb_uri = settings.get('zodb_uri')
zcml_file = settings.get('configure_zcml', 'configure.zcml')
if zodb_uri is None:
raise ValueError("No 'zodb_uri' in application configuration.")
finder = PersistentApplicationFinder(zodb_uri, appmaker)
def get_root(request):
return finder(request.environ)
config = Configurator(root_factory=get_root, settings=settings)
config.begin()
config.hook_zca()
config.load_zcml(zcml_file)
config.end()
return config.make_wsgi_app()
The repoze.folder code isn't dependent on BFG; it's actually general
enough to be used in any ZODB application. Therefore it uses the
"global" ZCA API to send events. When you call config.hook_zca(), this
tells BFG to replace the "normal" lookup for a Zope global registry with
a lookup which returns the ZCA registry that BFG uses.
After I added this call, I tested your code, and saw your event sent to
my console.
See http://docs.repoze.org/bfg/1.2/narr/zca.html for more info.
- C
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