geoalchemy2中的3D点

Question

我对（我认为）geoalchemy2的ORM有困难。我的模型定义如下：

class Location(Model):
    point = Column(Geometry('POINT', dimension=3, srid=4326))

我稍后插入如下：

location = Location(point=WKTElement('POINT(65.567 32.95 1156.7)', 4326))
session.add(location)
session.commit()

这会出现以下错误：

Geometry has Z dimension but column does not.