sqlalchemy, select using reverse-inclusive (not in) list of child column values

Question

I have a typical Post / Tags (many tags associated with one post) relationship in flask-sqlalchemy, and I want to select posts which aren\'t tagged with any tag in a list I prov

Answer 1

The notin_ works for me, adjusted example:

db.session.query(Post).filter(Post.tags.notin_(['dont','want','these']))