[Python-modules-team] Bug#828207: FTBFS: AttributeError: 'module' object has no attribute 'SubfieldBase'

[Brian May]

Source: python-django-extensions
Version: 1.6.7-2
Severity: serious
Justification: FTBFS

Guessing this might be a Django issue with 1.10~beta1-1:

dh_auto_test -- --system=custom --test-args="{interpreter} -m pytest --ds=tests.testapp.settings --cov=django_extensions"
I: pybuild base:184: python2.7 -m pytest --ds=tests.testapp.settings --cov=django_extensions
Traceback (most recent call last):
  File "/usr/lib/python2.7/runpy.py", line 174, in _run_module_as_main
    "__main__", fname, loader, pkg_name)
  File "/usr/lib/python2.7/runpy.py", line 72, in _run_code
    exec code in run_globals
  File "/usr/lib/python2.7/dist-packages/pytest.py", line 17, in <module>
    raise SystemExit(pytest.main())
  File "/usr/lib/python2.7/dist-packages/_pytest/config.py", line 39, in main
    config = _prepareconfig(args, plugins)
  File "/usr/lib/python2.7/dist-packages/_pytest/config.py", line 118, in _prepareconfig
    pluginmanager=pluginmanager, args=args)
  File "/usr/lib/python2.7/dist-packages/_pytest/vendored_packages/pluggy.py", line 724, in __call__
    return self._hookexec(self, self._nonwrappers + self._wrappers, kwargs)
  File "/usr/lib/python2.7/dist-packages/_pytest/vendored_packages/pluggy.py", line 338, in _hookexec
    return self._inner_hookexec(hook, methods, kwargs)
  File "/usr/lib/python2.7/dist-packages/_pytest/vendored_packages/pluggy.py", line 333, in <lambda>
    _MultiCall(methods, kwargs, hook.spec_opts).execute()
  File "/usr/lib/python2.7/dist-packages/_pytest/vendored_packages/pluggy.py", line 595, in execute
    return _wrapped_call(hook_impl.function(*args), self.execute)
  File "/usr/lib/python2.7/dist-packages/_pytest/vendored_packages/pluggy.py", line 249, in _wrapped_call
    wrap_controller.send(call_outcome)
  File "/usr/lib/python2.7/dist-packages/_pytest/helpconfig.py", line 28, in pytest_cmdline_parse
    config = outcome.get_result()
  File "/usr/lib/python2.7/dist-packages/_pytest/vendored_packages/pluggy.py", line 279, in get_result
    _reraise(*ex)  # noqa
  File "/usr/lib/python2.7/dist-packages/_pytest/vendored_packages/pluggy.py", line 264, in __init__
    self.result = func()
  File "/usr/lib/python2.7/dist-packages/_pytest/vendored_packages/pluggy.py", line 596, in execute
    res = hook_impl.function(*args)
  File "/usr/lib/python2.7/dist-packages/_pytest/config.py", line 861, in pytest_cmdline_parse
    self.parse(args)
  File "/usr/lib/python2.7/dist-packages/_pytest/config.py", line 966, in parse
    self._preparse(args, addopts=addopts)
  File "/usr/lib/python2.7/dist-packages/_pytest/config.py", line 937, in _preparse
    args=args, parser=self._parser)
  File "/usr/lib/python2.7/dist-packages/_pytest/vendored_packages/pluggy.py", line 724, in __call__
    return self._hookexec(self, self._nonwrappers + self._wrappers, kwargs)
  File "/usr/lib/python2.7/dist-packages/_pytest/vendored_packages/pluggy.py", line 338, in _hookexec
    return self._inner_hookexec(hook, methods, kwargs)
  File "/usr/lib/python2.7/dist-packages/_pytest/vendored_packages/pluggy.py", line 333, in <lambda>
    _MultiCall(methods, kwargs, hook.spec_opts).execute()
  File "/usr/lib/python2.7/dist-packages/_pytest/vendored_packages/pluggy.py", line 595, in execute
    return _wrapped_call(hook_impl.function(*args), self.execute)
  File "/usr/lib/python2.7/dist-packages/_pytest/vendored_packages/pluggy.py", line 253, in _wrapped_call
    return call_outcome.get_result()
  File "/usr/lib/python2.7/dist-packages/_pytest/vendored_packages/pluggy.py", line 279, in get_result
    _reraise(*ex)  # noqa
  File "/usr/lib/python2.7/dist-packages/_pytest/vendored_packages/pluggy.py", line 264, in __init__
    self.result = func()
  File "/usr/lib/python2.7/dist-packages/_pytest/vendored_packages/pluggy.py", line 596, in execute
    res = hook_impl.function(*args)
  File "/usr/lib/python2.7/dist-packages/pytest_django/plugin.py", line 238, in pytest_load_initial_conftests
    _setup_django()
  File "/usr/lib/python2.7/dist-packages/pytest_django/plugin.py", line 134, in _setup_django
    django.setup()
  File "/usr/lib/python2.7/dist-packages/django/__init__.py", line 27, in setup
    apps.populate(settings.INSTALLED_APPS)
  File "/usr/lib/python2.7/dist-packages/django/apps/registry.py", line 108, in populate
    app_config.import_models(all_models)
  File "/usr/lib/python2.7/dist-packages/django/apps/config.py", line 199, in import_models
    self.models_module = import_module(models_module_name)
  File "/usr/lib/python2.7/importlib/__init__.py", line 37, in import_module
    __import__(name)
  File "tests/testapp/models.py", line 10, in <module>
    from django_extensions.db.fields.json import JSONField
  File "django_extensions/db/fields/json.py", line 65, in <module>
    class JSONField(six.with_metaclass(models.SubfieldBase, models.TextField)):
AttributeError: 'module' object has no attribute 'SubfieldBase'

-- System Information:
Debian Release: stretch/sid
  APT prefers testing
  APT policy: (500, 'testing'), (500, 'stable'), (500, 'oldstable')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 4.5.0-2-amd64 (SMP w/4 CPU cores)
Locale: LANG=en_AU.UTF-8, LC_CTYPE=en_AU.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)

-- no debconf information