SQLAlchemy: get relationships from a db.Model

Question

I need to get a list of a model\'s properties which are actually relationships (that is, they were created by relationship()).

Say I have a model

Answer 1

There is indeed - take a look at sqlalchemy.inspection.inspect. Calling inspect on a mapped class (for example, your Thing class) will return a Mapper, which has a relationships attribute that is dict like:

from sqlalchemy.inspection import inspect

thing_relations = inspect(Thing).relationships.items()

Answer 2

Instead of using inspect you can also use

model.__mapper__.relationships

Answer 3

You just need to use the inspect module from sqlalchemy

from sqlalchemy import inspect

i = inspect(model)
i.relationships

If you need the class of each referred model you can do:

referred_classes = [r.mapper.class_ for r in i.relationships]