本文整理汇总了Python中sqlalchemy.ext.declarative.ConcreteBase方法的典型用法代码示例。如果您正苦于以下问题：Python declarative.ConcreteBase方法的具体用法？Python declarative.ConcreteBase怎么用？Python declarative.ConcreteBase使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类sqlalchemy.ext.declarative的用法示例。
在下文中一共展示了declarative.ConcreteBase方法的1个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的Python代码示例。
示例1: test_concrete_extension
# 需要导入模块: from sqlalchemy.ext import declarative [as 别名]
# 或者: from sqlalchemy.ext.declarative import ConcreteBase [as 别名]
def test_concrete_extension(self):
class Employee(ConcreteBase, Base, fixtures.ComparableEntity):
__tablename__ = "employee"
employee_id = Column(
Integer, primary_key=True, test_needs_autoincrement=True
)
name = Column(String(50))
__mapper_args__ = {
"polymorphic_identity": "employee",
"concrete": True,
}
class Manager(Employee):
__tablename__ = "manager"
employee_id = Column(
Integer, primary_key=True, test_needs_autoincrement=True
)
name = Column(String(50))
golf_swing = Column(String(40))
__mapper_args__ = {
"polymorphic_identity": "manager",
"concrete": True,
}
class Boss(Manager):
__tablename__ = "boss"
employee_id = Column(
Integer, primary_key=True, test_needs_autoincrement=True
)
name = Column(String(50))
golf_swing = Column(String(40))
__mapper_args__ = {
"polymorphic_identity": "boss",
"concrete": True,
}
class Engineer(Employee):
__tablename__ = "engineer"
employee_id = Column(
Integer, primary_key=True, test_needs_autoincrement=True
)
name = Column(String(50))
primary_language = Column(String(40))
__mapper_args__ = {
"polymorphic_identity": "engineer",
"concrete": True,
}
self._roundtrip(Employee, Manager, Engineer, Boss)