Sqlalchemy: Typeerror: Unhashable Type Creating Instance, Sqlalchemy

I am getting an error while trying to update code for: https://github.com/thrisp/flask-security from python 2.7 to 3.3 given the following most basic instance test.py: from flask

Solution 1:

A similar issue is discussed here: Unhashable Type error when modifying SqlAlchemy Models

A solution (or at least workaround) is to define a hash function in your Role class, something like this:

def__hash__(self):
    returnhash(self.name)