Hello everyone,
I want to find emails that have no projects added. 'projects' is an SQLA
collection in Email class.
So I have this:
unassocusers = session.query(Email).filter(Email.projects ==
[]).order_by(Email.email).all()
And I get this:
InvalidRequestError: Can't compare a collection to an object or
collection; use contains() to test for membership.
This is again many to many relation:
mapper(Email,email_table, properties={'projects':relation(Project,
secondary=project_emails_assoc_table, backref='email_project_assoc')}
)
Any way of achieving this?
Regards,
mk
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