SqlAlchemy - Filtering by Relationship Attribute

Question

I don\'t have much experience with SQLAlchemy and I have a problem, which I can\'t solve. I tried searching and I tried a lot of code. This is my Class (reduced to the most

Answer 1

I used it with sessions, but an alternate way where you can access the relationship field directly is

db_session.query(Patient).join(Patient.mother) \
    .filter(Patient.mother.property.mapper.class_.phenoscore==10)

I have not tested it, but I guess this would also work

Patient.query.join(Patient.mother) \
    .filter(Patient.mother.property.mapper.class_.phenoscore==10)