本文整理匯總了Python中sqlalchemy.ext.declarative.ConcreteBase方法的典型用法代碼示例。如果您正苦於以下問題：Python declarative.ConcreteBase方法的具體用法？Python declarative.ConcreteBase怎麽用？Python declarative.ConcreteBase使用的例子？那麽, 這裏精選的方法代碼示例或許可以為您提供幫助。您也可以進一步了解該方法所在類sqlalchemy.ext.declarative的用法示例。
在下文中一共展示了declarative.ConcreteBase方法的1個代碼示例，這些例子默認根據受歡迎程度排序。您可以為喜歡或者感覺有用的代碼點讚，您的評價將有助於係統推薦出更棒的Python代碼示例。
示例1: test_concrete_extension
# 需要導入模塊: from sqlalchemy.ext import declarative [as 別名]
# 或者: from sqlalchemy.ext.declarative import ConcreteBase [as 別名]
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)