Is there some way to check whether an adapter exists without having
something to adapt?
Specifically, I want to know if a particular view is registered for a
particular type of context and request/layer, with a particular name.
However, I don't have an instance of the object of that type, nor the
request, at the time when I need to do the check.
I tried this, but it doesn't seem to work, at least not for globally
site_manager = getSiteManager(site)
addview_factory = site_manager.adapters.lookup((Implements(IAdding),
Implements(IBrowserRequest)), IBrowserView, name=fti.factory)
Author of `Professional Plone Development`, a book for developers who
want to work with Plone. See http://martinaspeli.net/plone-book
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