Support for hybrid_property?

Hello,

I am trying to use hybrid_property as a property on a GraphQL response. However, when I execute the GraphQL request, I am receiving an error stating the property cannot be found.

Are SQlAlchemy hybrid_property attributes currently supported?

Thanks, G

@hybrid_property
    def document_count(self):
        return len(self.linked_documents)

[anisjonischkeit]

# models.py

class Company(Base):
    __tablename__ = 'licence_revisions'

    id = Column(...)
    ...

    licence_states = relationship("Licence", back_populates="company", lazy="dynamic")

    @hybrid_property
    def latest_licence_states(self):
        db_session = object_session(self)

        return self.licence_states \
                   .order_by(Licence.uuid, Licence.revision_id) \
                   .distinct(Licence.uuid).all()

# query.py

class Licence(SQLAlchemyObjectType):
    ...

class Company(SQLAlchemyObjectType):
    class Meta:
        model = models.Company
        interfaces = (graphene.relay.Node, )


    # currently I need these lines to get it to work properly. if I leave them out I
    # just get a string representation of the list of  SQLAlchemy objects:
    # "[<models.Licence object at 0x7f073450ba90>, <models.Licence object at 0x7f073450bb10>]"

    latest_licence_states = SQLAlchemyConnectionField(Licence)
    def resolve_latest_licence_states(self, info):
        return self.latest_licence_states

class Query(graphene.ObjectType):
    node = graphene.relay.Node.Field()

    Company = graphene.Field(Company)
    def resolve_company(self, info):

        query = info.context["session"].query
        company = query(models.Company).get(COMPANY_ID)

        return company

I want to tell graphene-sqlalchemy that the returned type for the hybrid_property is a list of SQLAlchemy objects

[Salamek]

@anisjonischkeit Just probably late answer to your Q (and help anyone who google this as i did), i had similar problem with hybrid property that returned boolean, but graphene-sqlalchemy was casting it to string ("true" instead of true). Only thing i had to do is set query return type in SQLAlchemyObjectType is_managed = graphene.Boolean():

class Subject(SQLAlchemyObjectType):
    # is_managed is hybrid property so we need to force the type
    is_managed = graphene.Boolean()

    class Meta:
        model = SubjectModel
        interfaces = (relay.Node, )

After this i get correct is_managed: true instead of is_managed: "true" in query response JSON

Not sure if this fix can help with your problem or not, but i guess you should use something like graphene.List(Licence)