sqlalchemy: 'InstrumentedList' object has no attribute 'filter'

Question

I have the following 3 classes:

class Resource:
    id = Column(Integer, primary_key=True)
    path = Column(Text)
    data = Column(Binary)
    type = Colum         


        

Answer 1

In order to work with the relationship as with Query, you need to configure it with lazy='dynamic'. See more on this in Dynamic Relationship Loaders:

_resources = relationship("EnvironmentResource",
    cascade="all, delete-orphan",
    lazy='dynamic',
    passive_deletes=True)