Issues with ReviewBoard site upgrade for 4.0.2 + AttributeError: 'module' object has no attribute 'SubfieldBase'

[harish.va...@gmail.com]

Hi,

We were able to successfully have rb-site 4..0.2 installed.

# which rb-site

/usr/bin/rb-site

# rb-site --version

Review Board/rb-site 4.0.2

Python 2.7.5 (default, Nov 20 2015, 02:00:19) 

Installed to /usr/lib/python2.7/site-packages/ReviewBoard-4.0.2-py2.7.egg/reviewboard

But, when we are trying to upgrade the site using rb-site upgrade, from the current site version 3.0,20, we are getting the below error.

  File "/usr/lib64/python2.7/importlib/__init__.py", line 37, in import_module

    __import__(name)

  File "/usr/lib/python2.7/site-packages/ReviewBoard-4.0.2-py2.7.egg/reviewboard/notifications/models.py", line 8, in <module>

    from multiselectfield import MultiSelectField

  File "/usr/lib/python2.7/site-packages/multiselectfield/__init__.py", line 1, in <module>

    from multiselectfield.db.fields import MultiSelectField

  File "/usr/lib/python2.7/site-packages/multiselectfield/db/fields.py", line 135, in <module>

    MultiSelectField = add_metaclass(models.SubfieldBase)(MultiSelectField)

AttributeError: 'module' object has no attribute 'SubfieldBase'

Can anyone please help let know on how to address this.

Thanks