[Zope3-dev] How to provide some default utilities for sub-site

[Adam Groszer]

I'd like to provide some default utilities for my sub-site.
As I checked there is the nice ensureUtility method but as it turns
out it failes with

...
  Module szscreen.app, line 339, in __init__
    'WorkflowUtility', WorkflowUtility, 'wfu')
  Module zope.app.appsetup.bootstrap, line 66, in ensureUtility
    name, **kw
  Module zope.app.appsetup.bootstrap, line 74, in addConfigureUtility
    utility_name = addUtility(root_folder, utility_type, utility_factory, **kw)
  Module zope.app.appsetup.bootstrap, line 83, in addUtility
    package = getSiteManagerDefault(root_folder)
  Module zope.app.appsetup.bootstrap, line 105, in getSiteManagerDefault
    package = traverse(root_folder, package_name)
  Module zope.app.traversing.api, line 96, in traverse
    return traverser.traverse(path, request=request)
  Module zope.app.traversing.adapters, line 120, in traverse
    curr = IPhysicallyLocatable(self.context).getRoot()
  Module zope.app.location.traversing, line 90, in getRoot
    raise TypeError("Not enough context to determine location root")
TypeError: Not enough context to determine location root

when it checks the existence of the utility it uses
  sm = root_folder.getSiteManager()
but when it wants to add the non existing utility
  package = getSiteManagerDefault(root_folder)
which in turn wants to traverse like this
  package_name = '/++etc++site/default'
  package = traverse(root_folder, package_name)

Is there any way to easily solve the task?

Excerpt from szscreen.app:

class IApplication(IReadContainer, IPossibleSite, IAttributeAnnotatable):
      ""

class Application(Persistent, SampleContainer, SiteManagerContainer):

        implements(IApplication)
        
        def __init__(self):
                SampleContainer.__init__(self)
                
                sm = LocalSiteManager(self)
                self.setSiteManager(sm)

                ...
                
                ensureUtility(self, IWorkflowUtility,
                        'WorkflowUtility', WorkflowUtility, 'wfu')

-- 
Best regards,
 Adam                          mailto:adamg at fw.hu
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