filtering by association attributes with SqlAlchemy association_proxy

Question

I have a many-to-many (developers & projects) relationship modeled using SA\'s association_proxy. The collections (developers on each project & project

Answer 1

To add to Denis's answer:

When I tried the any() method, I got this error

sqlalchemy.exc.InvalidRequestError: 'any()' not implemented for scalar attributes. Use has().

Using has() instead of any() worked for me.

It looks like any() is for list relationships (in this case Developers potentially have multiple projects so Developer.developerProjects is a list). Whereas has() is for a single relationship (for instance if a Developer had one Workplace associated).

Here is the link to documentation: http://docs.sqlalchemy.org/en/latest/orm/internals.html#sqlalchemy.orm.properties.RelationshipProperty.Comparator.has

Answer 2

Use any() method of association proxy:

s.query(Developer).filter(Developer.developerProjects.any(status='active'))