如何在Graphene-SQLAlchemy中的子关系上使用字段参数查询

Question

我试图弄清楚如何接受一个参数并在GraphQL的子表中对该字段进行查询。

这是一个例子。

query{
  allModels{
    edges{
      node{
        featureVectors(featureSize: 128){ #I want to query on this
          edges{
            node{
              modelSize
              featureVectors
            }
          }
        }
      }
    }
  }
}

这里是我用来查询数据的地方。它可以查询数据，但我希望能够传递参数来搜索特定的特征，例如featureVectors（featureSize：128）。我似乎在Graphene-SQLAlchemy库中找不到任何可以原生允许的方法。

class ModelModel(Base):
    __tablename__ = 'models'

    id = Column(Integer, primary_key=True, server_default=text("nextval('models_id_seq'::regclass)"))
    type = Column(Text)
    components = Column(Float)
    notes = Column(Text)
    feature_vectors = relationship("FeatureVector", back_populates='models')

class FeatureVectorModel(Base):

    id = Column(BigInteger, primary_key=True, server_default=text("nextval('feature_vectors_id_seq'::regclass)"))
    model_size = Column(Integer)
    feature_vectors = Column(ARRAY(Float(precision=53)))

    models = relationship('Model', back_populates='feature_vectors')

class Model(SQLAlchemyObjectType):
    class Meta:
        model = ModelModel
        interfaces = (relay.Node, )


class ModelConn(relay.Connection):
    class Meta:
        node = Model


class Query(graphene.ObjectType):
    node = relay.Node.Field(schema_cadlearn.Model)
    all_models = SQLAlchemyConnectionField(ModelConn)