[Grok-dev] Error install megrok.rdb

[Mauro Boschi]

Hi to all,
I'm new with Grok!

As in http://grok.zope.org/documentation/how-to/orm-using-megrok.rdb-and-sqlalchemy

I have added megrok.rdb to setup.py

install_requires=['setuptools',
           ...
           # Add extra requirements here
           'megrok.rdb'
           ],

than I have run bin/buildout

restarting Grok I see this error:

# bin/paster serve --reload parts/etc/deploy.ini 
Starting subprocess with file monitor
Traceback (most recent call last):
 File "bin/paster", line 20, in <module>
   paste.script.command.run()
 File "/home/usytis/.buildout/eggs/PasteScript-1.7.5-py2.7.egg/paste/script/command.py", line 104, in run
   invoke(command, command_name, options, args[1:])
 File "/home/usytis/.buildout/eggs/PasteScript-1.7.5-py2.7.egg/paste/script/command.py", line 143, in invoke
   exit_code = runner.run(args)
 File "/home/usytis/.buildout/eggs/PasteScript-1.7.5-py2.7.egg/paste/script/command.py", line 238, in run
   result = self.command()
 File "/home/usytis/.buildout/eggs/PasteScript-1.7.5-py2.7.egg/paste/script/serve.py", line 284, in command
   relative_to=base, global_conf=vars)
 File "/home/usytis/.buildout/eggs/PasteScript-1.7.5-py2.7.egg/paste/script/serve.py", line 321, in loadapp
   **kw)
 File "/home/usytis/.buildout/eggs/PasteDeploy-1.3.4-py2.7.egg/paste/deploy/loadwsgi.py", line 203, in loadapp
   return loadobj(APP, uri, name=name, **kw)
 File "/home/usytis/.buildout/eggs/PasteDeploy-1.3.4-py2.7.egg/paste/deploy/loadwsgi.py", line 224, in loadobj
   return context.create()
 File "/home/usytis/.buildout/eggs/PasteDeploy-1.3.4-py2.7.egg/paste/deploy/loadwsgi.py", line 617, in create
   return self.object_type.invoke(self)
 File "/home/usytis/.buildout/eggs/PasteDeploy-1.3.4-py2.7.egg/paste/deploy/loadwsgi.py", line 163, in invoke
   app = context.app_context.create()
 File "/home/usytis/.buildout/eggs/PasteDeploy-1.3.4-py2.7.egg/paste/deploy/loadwsgi.py", line 617, in create
   return self.object_type.invoke(self)
 File "/home/usytis/.buildout/eggs/PasteDeploy-1.3.4-py2.7.egg/paste/deploy/loadwsgi.py", line 109, in invoke
   return fix_call(context.object, context.global_conf, **context.local_conf)
 File "/home/usytis/.buildout/eggs/PasteDeploy-1.3.4-py2.7.egg/paste/deploy/util/fixtypeerror.py", line 57, in fix_call
   val = callable(*args, **kw)
 File "/home/usytis/.buildout/eggs/grokcore.startup-1.2-py2.7.egg/grokcore/startup/startup.py", line 14, in application_factory
   return zope.app.wsgi.getWSGIApplication(zope_conf)
 File "/home/usytis/.buildout/eggs/zope.app.wsgi-3.13.0-py2.7.egg/zope/app/wsgi/__init__.py", line 162, in getWSGIApplication
   db = config(configfile, schemafile, features)
 File "/home/usytis/.buildout/eggs/zope.app.wsgi-3.13.0-py2.7.egg/zope/app/wsgi/__init__.py", line 150, in config
   appsetup.config(options.site_definition, features=features)
 File "/home/usytis/.buildout/eggs/zope.app.appsetup-3.15.0-py2.7.egg/zope/app/appsetup/appsetup.py", line 111, in config
   context = xmlconfig.file(file, context=context, execute=execute)
 File "/home/usytis/.buildout/eggs/zope.configuration-3.7.4-py2.7.egg/zope/configuration/xmlconfig.py", line 649, in file
   include(context, name, package)
 File "/home/usytis/.buildout/eggs/zope.configuration-3.7.4-py2.7.egg/zope/configuration/xmlconfig.py", line 548, in include
   processxmlfile(f, context)
 File "/home/usytis/.buildout/eggs/zope.configuration-3.7.4-py2.7.egg/zope/configuration/xmlconfig.py", line 380, in processxmlfile
   parser.parse(src)
 File "/usr/lib/python2.7/xml/sax/expatreader.py", line 107, in parse
   xmlreader.IncrementalParser.parse(self, source)
 File "/usr/lib/python2.7/xml/sax/xmlreader.py", line 123, in parse
   self.feed(buffer)
 File "/usr/lib/python2.7/xml/sax/expatreader.py", line 207, in feed
   self._parser.Parse(data, isFinal)
 File "/usr/lib/python2.7/xml/sax/expatreader.py", line 349, in end_element_ns
   self._cont_handler.endElementNS(pair, None)
 File "/home/usytis/.buildout/eggs/zope.configuration-3.7.4-py2.7.egg/zope/configuration/xmlconfig.py", line 359, in endElementNS
   self.context.end()
 File "/home/usytis/.buildout/eggs/zope.configuration-3.7.4-py2.7.egg/zope/configuration/config.py", line 558, in end
   self.stack.pop().finish()
 File "/home/usytis/.buildout/eggs/zope.configuration-3.7.4-py2.7.egg/zope/configuration/config.py", line 706, in finish
   actions = self.handler(context, **args)
 File "/home/usytis/.buildout/eggs/zope.configuration-3.7.4-py2.7.egg/zope/configuration/xmlconfig.py", line 548, in include
   processxmlfile(f, context)
 File "/home/usytis/.buildout/eggs/zope.configuration-3.7.4-py2.7.egg/zope/configuration/xmlconfig.py", line 380, in processxmlfile
   parser.parse(src)
 File "/usr/lib/python2.7/xml/sax/expatreader.py", line 107, in parse
   xmlreader.IncrementalParser.parse(self, source)
 File "/usr/lib/python2.7/xml/sax/xmlreader.py", line 123, in parse
   self.feed(buffer)
 File "/usr/lib/python2.7/xml/sax/expatreader.py", line 207, in feed
   self._parser.Parse(data, isFinal)
 File "/usr/lib/python2.7/xml/sax/expatreader.py", line 349, in end_element_ns
   self._cont_handler.endElementNS(pair, None)
 File "/home/usytis/.buildout/eggs/zope.configuration-3.7.4-py2.7.egg/zope/configuration/xmlconfig.py", line 359, in endElementNS
   self.context.end()
 File "/home/usytis/.buildout/eggs/zope.configuration-3.7.4-py2.7.egg/zope/configuration/config.py", line 558, in end
   self.stack.pop().finish()
 File "/home/usytis/.buildout/eggs/zope.configuration-3.7.4-py2.7.egg/zope/configuration/config.py", line 706, in finish
   actions = self.handler(context, **args)
 File "/home/usytis/.buildout/eggs/z3c.autoinclude-0.3.3-py2.7.egg/z3c/autoinclude/zcml.py", line 51, in includeDependenciesDirective
   info = DependencyFinder(dist).includableInfo(['configure.zcml', 'meta.zcml'])
 File "/home/usytis/.buildout/eggs/z3c.autoinclude-0.3.3-py2.7.egg/z3c/autoinclude/dependency.py", line 24, in includableInfo
   module = resolve(dotted_name)
 File "/home/usytis/.buildout/eggs/zope.dottedname-3.4.6-py2.7.egg/zope/dottedname/resolve.py", line 38, in resolve
   __import__(used)
 File "/home/usytis/.buildout/eggs/megrok.rdb-0.12-py2.7.egg/megrok/rdb/__init__.py", line 1, in <module>
   from megrok.rdb.components import Model, Container, QueryContainer
 File "/home/usytis/.buildout/eggs/megrok.rdb-0.12-py2.7.egg/megrok/rdb/components.py", line 46, in <module>
   class Container(MappedCollection):
 File "/home/usytis/.buildout/eggs/megrok.rdb-0.12-py2.7.egg/megrok/rdb/components.py", line 62, in Container
   @collection.on_link
zope.configuration.xmlconfig.ZopeXMLConfigurationError: File "/home/usytis/second/parts/etc/site.zcml", line 4.2-4.30
   ZopeXMLConfigurationError: File "/home/usytis/second/src/second/configure.zcml", line 4.2-4.37
   AttributeError: type object 'collection' has no attribute 'on_link'

Thanks a lot!