我想知道如果知道一个对象,它是否是sqlalchemy映射模型的一个实例.
通常,我会使用isinstance(obj,DeclarativeBase).但是,在这种情况下,我没有使用可用的DeclarativeBase类(因为它在依赖项目中).
我想知道在这种情况下最佳做法是什么.
class Person(DeclarativeBase):
__tablename__ = "Persons"
p = Person()
print isinstance(p, DeclarativeBase)
#prints True
#However in my scenario, I do not have the DeclarativeBase available
#since the DeclarativeBase will be constructed in the depending web app
#while my code will act as a library that will be imported into the web app
#what are my alternatives?
sqlalchemy ×1