I have following table:
class Group(DeclarativeBase):
"""
Group definition
Only the ``group_name`` column is required.
"""
__tablename__ = 'tg_group'
id = Column(Integer, autoincrement=True, primary_key=True)
group_name = Column(Unicode(16), unique=True, nullable=False)
display_name = Column(Unicode(255))
created = Column(DateTime, default=datetime.now)
users = relation('User', secondary=user_group_table, backref='groups')
'id' used to be 'group_id'. I am using TGII and just wrote a migration
script to change the 'group_id' field to 'id'. I then manually went into
class (above) and changed it to 'id' as well.
Now upon running my project, I get following error message:
sqlalchemy.exc.ArgumentError: Mapper Mapper|Group|tg_group could not
assemble any primary key columns for mapped table 'tg_group'
I am at a loss as to why this is happening. I changed all the references to
the 'group_id' field to 'id'. Googl'ing this error often comes with a
solution that some table does not have a primary key, but I do not see how
this could be the case here - as I clearly state 'primary_key = True' for
the 'id' field.
Can anyone please help me with the trouble shooting?
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