ArgumentError: relationship expects a class or mapper argument
not happy with myself since it's such a dumb mistake but here is my culprit:
report_type = relationship('tReportType', uselist=False, backref=backref('report'))
should be:
report_type = relationship('TReportType', uselist=False, backref=backref('report'))
capital T instead of t, I should be referencing the class, not my actual table name: 'tReportType'
-> 'TReportType'