output from running py.test

/home/piotr/projects/kotti_content_proxy/env/bin/python /home/piotr/apps/pycharm-4.5.3/helpers/pycharm/pytestrunner.py -p pytest_teamcity kotti_content_proxy/tests
Testing started at 1:30 PM ...
============================= test session starts ==============================
platform linux2 -- Python 2.7.10, pytest-2.8.0, py-1.4.30, pluggy-0.3.1
rootdir: /home/piotr/projects/kotti_content_proxy, inifile: setup.cfg
plugins: Kotti-1.2.0, xdist-1.13.1, pep8-1.0.6, cov-2.1.0, pycharm-0.3.0
collected 13 items

kotti_content_proxy/__init__.py .
kotti_content_proxy/resources.py F
/home/piotr/projects/kotti_content_proxy/kotti_content_proxy/resources.py:65:80: E501 line too long (83 > 79 characters)
        proxied_attrs = super(ContentProxy, self).__getattribute__('proxied_attrs')
                                                                               ^


kotti_content_proxy/views.py .
kotti_content_proxy/tests/conftest.py .
kotti_content_proxy/tests/test_models.py .F
Traceback (most recent call last):
  File "/home/piotr/projects/kotti_content_proxy/kotti_content_proxy/tests/test_models.py", line 15, in test_model
    root['proxy'] = ContentProxy(proxied_id=doc.id, title=u'proxied about')
  File "<string>", line 2, in __init__
  File "/home/piotr/projects/kotti_content_proxy/env/lib/python2.7/site-packages/sqlalchemy/orm/instrumentation.py", line 337, in _new_state_if_none
    elif self.class_ is not instance.__class__ and \
  File "/home/piotr/projects/kotti_content_proxy/kotti_content_proxy/resources.py", line 67, in __getattribute__
    if key in proxied_attrs:
TypeError: argument of type 'NoneType' is not iterable

kotti_content_proxy/tests/test_views.py .
INTERNALERROR> Traceback (most recent call last):
INTERNALERROR>   File "/home/piotr/projects/kotti_content_proxy/env/lib/python2.7/site-packages/_pytest/main.py", line 90, in wrap_session
INTERNALERROR>     session.exitstatus = doit(config, session) or 0
INTERNALERROR>   File "/home/piotr/projects/kotti_content_proxy/env/lib/python2.7/site-packages/_pytest/main.py", line 121, in _main
INTERNALERROR>     config.hook.pytest_runtestloop(session=session)
INTERNALERROR>   File "/home/piotr/projects/kotti_content_proxy/env/lib/python2.7/site-packages/_pytest/vendored_packages/pluggy.py", line 724, in __call__
INTERNALERROR>     return self._hookexec(self, self._nonwrappers + self._wrappers, kwargs)
INTERNALERROR>   File "/home/piotr/projects/kotti_content_proxy/env/lib/python2.7/site-packages/_pytest/vendored_packages/pluggy.py", line 338, in _hookexec
INTERNALERROR>     return self._inner_hookexec(hook, methods, kwargs)
INTERNALERROR>   File "/home/piotr/projects/kotti_content_proxy/env/lib/python2.7/site-packages/_pytest/vendored_packages/pluggy.py", line 333, in <lambda>
INTERNALERROR>     _MultiCall(methods, kwargs, hook.spec_opts).execute()
INTERNALERROR>   File "/home/piotr/projects/kotti_content_proxy/env/lib/python2.7/site-packages/_pytest/vendored_packages/pluggy.py", line 596, in execute
INTERNALERROR>     res = hook_impl.function(*args)
INTERNALERROR>   File "/home/piotr/projects/kotti_content_proxy/env/lib/python2.7/site-packages/_pytest/main.py", line 146, in pytest_runtestloop
INTERNALERROR>     item.config.hook.pytest_runtest_protocol(item=item, nextitem=nextitem)
INTERNALERROR>   File "/home/piotr/projects/kotti_content_proxy/env/lib/python2.7/site-packages/_pytest/vendored_packages/pluggy.py", line 724, in __call__
INTERNALERROR>     return self._hookexec(self, self._nonwrappers + self._wrappers, kwargs)
INTERNALERROR>   File "/home/piotr/projects/kotti_content_proxy/env/lib/python2.7/site-packages/_pytest/vendored_packages/pluggy.py", line 338, in _hookexec
INTERNALERROR>     return self._inner_hookexec(hook, methods, kwargs)
INTERNALERROR>   File "/home/piotr/projects/kotti_content_proxy/env/lib/python2.7/site-packages/_pytest/vendored_packages/pluggy.py", line 333, in <lambda>
INTERNALERROR>     _MultiCall(methods, kwargs, hook.spec_opts).execute()
INTERNALERROR>   File "/home/piotr/projects/kotti_content_proxy/env/lib/python2.7/site-packages/_pytest/vendored_packages/pluggy.py", line 595, in execute
INTERNALERROR>     return _wrapped_call(hook_impl.function(*args), self.execute)
INTERNALERROR>   File "/home/piotr/projects/kotti_content_proxy/env/lib/python2.7/site-packages/_pytest/vendored_packages/pluggy.py", line 253, in _wrapped_call
INTERNALERROR>     return call_outcome.get_result()
INTERNALERROR>   File "/home/piotr/projects/kotti_content_proxy/env/lib/python2.7/site-packages/_pytest/vendored_packages/pluggy.py", line 279, in get_result
INTERNALERROR>     _reraise(*ex)  # noqa
INTERNALERROR>   File "/home/piotr/projects/kotti_content_proxy/env/lib/python2.7/site-packages/_pytest/vendored_packages/pluggy.py", line 264, in __init__
INTERNALERROR>     self.result = func()
INTERNALERROR>   File "/home/piotr/projects/kotti_content_proxy/env/lib/python2.7/site-packages/_pytest/vendored_packages/pluggy.py", line 596, in execute
INTERNALERROR>     res = hook_impl.function(*args)
INTERNALERROR>   File "/home/piotr/projects/kotti_content_proxy/env/lib/python2.7/site-packages/_pytest/runner.py", line 65, in pytest_runtest_protocol
INTERNALERROR>     runtestprotocol(item, nextitem=nextitem)
INTERNALERROR>   File "/home/piotr/projects/kotti_content_proxy/env/lib/python2.7/site-packages/_pytest/runner.py", line 72, in runtestprotocol
INTERNALERROR>     rep = call_and_report(item, "setup", log)
INTERNALERROR>   File "/home/piotr/projects/kotti_content_proxy/env/lib/python2.7/site-packages/_pytest/runner.py", line 121, in call_and_report
INTERNALERROR>     report = hook.pytest_runtest_makereport(item=item, call=call)
INTERNALERROR>   File "/home/piotr/projects/kotti_content_proxy/env/lib/python2.7/site-packages/_pytest/vendored_packages/pluggy.py", line 724, in __call__
INTERNALERROR>     return self._hookexec(self, self._nonwrappers + self._wrappers, kwargs)
INTERNALERROR>   File "/home/piotr/projects/kotti_content_proxy/env/lib/python2.7/site-packages/_pytest/vendored_packages/pluggy.py", line 338, in _hookexec
INTERNALERROR>     return self._inner_hookexec(hook, methods, kwargs)
INTERNALERROR>   File "/home/piotr/projects/kotti_content_proxy/env/lib/python2.7/site-packages/_pytest/vendored_packages/pluggy.py", line 333, in <lambda>
INTERNALERROR>     _MultiCall(methods, kwargs, hook.spec_opts).execute()
INTERNALERROR>   File "/home/piotr/projects/kotti_content_proxy/env/lib/python2.7/site-packages/_pytest/vendored_packages/pluggy.py", line 595, in execute
INTERNALERROR>     return _wrapped_call(hook_impl.function(*args), self.execute)
INTERNALERROR>   File "/home/piotr/projects/kotti_content_proxy/env/lib/python2.7/site-packages/_pytest/vendored_packages/pluggy.py", line 249, in _wrapped_call
INTERNALERROR>     wrap_controller.send(call_outcome)
INTERNALERROR>   File "/home/piotr/projects/kotti_content_proxy/env/lib/python2.7/site-packages/_pytest/skipping.py", line 170, in pytest_runtest_makereport
INTERNALERROR>     rep = outcome.get_result()
INTERNALERROR>   File "/home/piotr/projects/kotti_content_proxy/env/lib/python2.7/site-packages/_pytest/vendored_packages/pluggy.py", line 279, in get_result
INTERNALERROR>     _reraise(*ex)  # noqa
INTERNALERROR>   File "/home/piotr/projects/kotti_content_proxy/env/lib/python2.7/site-packages/_pytest/vendored_packages/pluggy.py", line 264, in __init__
INTERNALERROR>     self.result = func()
INTERNALERROR>   File "/home/piotr/projects/kotti_content_proxy/env/lib/python2.7/site-packages/_pytest/vendored_packages/pluggy.py", line 596, in execute
INTERNALERROR>     res = hook_impl.function(*args)
INTERNALERROR>   File "/home/piotr/projects/kotti_content_proxy/env/lib/python2.7/site-packages/_pytest/runner.py", line 227, in pytest_runtest_makereport
INTERNALERROR>     style=item.config.option.tbstyle)
INTERNALERROR>   File "/home/piotr/projects/kotti_content_proxy/env/lib/python2.7/site-packages/_pytest/python.py", line 715, in _repr_failure_py
INTERNALERROR>     style=style)
INTERNALERROR>   File "/home/piotr/projects/kotti_content_proxy/env/lib/python2.7/site-packages/_pytest/main.py", line 397, in _repr_failure_py
INTERNALERROR>     self._prunetraceback(excinfo)
INTERNALERROR>   File "/home/piotr/projects/kotti_content_proxy/env/lib/python2.7/site-packages/_pytest/python.py", line 698, in _prunetraceback
INTERNALERROR>     ntraceback = ntraceback.filter(filter_traceback)
INTERNALERROR>   File "/home/piotr/projects/kotti_content_proxy/env/lib/python2.7/site-packages/py/_code/code.py", line 299, in filter
INTERNALERROR>     return Traceback(filter(fn, self))
INTERNALERROR>   File "/home/piotr/projects/kotti_content_proxy/env/lib/python2.7/site-packages/_pytest/python.py", line 49, in filter_traceback
INTERNALERROR>     return entry.path != cutdir1 and not entry.path.relto(cutdir2)
INTERNALERROR> AttributeError: 'str' object has no attribute 'relto'

====================== 2 failed, 5 passed in 0.94 seconds ======================

Process finished with exit code 0

resources.py

# -*- coding: utf-8 -*-

"""
Created on 2014-09-23
:author: Andreas Kaiser (disko)
"""

from kotti.resources import Content
from sqlalchemy import Column
from sqlalchemy import ForeignKey
from sqlalchemy import Integer
from sqlalchemy.orm import relationship

from kotti_content_proxy import _


class ContentProxy(Content):
    """ A ContentProxy refers to any other content node in the site. """

    id = Column(
        Integer,
        ForeignKey('contents.id'),
        primary_key=True)
    proxied_id = Column(
        Integer,
        ForeignKey('contents.id'),
        nullable=False)

    proxied_object = relationship(Content, foreign_keys=[proxied_id])

    proxied_attrs = None

    __mapper_args__ = Content.__mapper_args__.copy()
    __mapper_args__.update({
        'inherit_condition': (id == Content.id),
        'polymorphic_identity': 'content_proxy',
    })

    type_info = Content.type_info.copy(
        name=u'ContentProxy',
        title=_(u'Content Proxy'),
        add_view=u'add_content_proxy',
        addable_to=[u'Document'],
        )

    def __init__(self, proxied_id=None, proxied_attrs=None, **kwargs):
        """ Constructor

        :param proxied_id: id of the proxied object
        :type proxied_id: int

        :param **kwargs: see :class:`kotti.resources.Content`
        :type **kwargs: variant
        """

        super(ContentProxy, self).__init__(**kwargs)
        self.proxied_id = proxied_id
        proxied_attrs = tuple(proxied_attrs) if proxied_attrs else tuple()
        self.proxied_attrs = ('__acl__', ) + proxied_attrs

    def __getattribute__(self, key):
        """ Proxy some attributes.
            See https://www.inkling.com/read/learning-python-mark-lutz-4th/chapter-37/--getattr---and---getattribute--  # noqa
        """
        proxied_attrs = super(ContentProxy, self).__getattribute__('proxied_attrs')
        if key in proxied_attrs:
            return self.proxied_object.__getattribute__(key)

        return super(ContentProxy, self).__getattribute__(key)