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问题描述
我有一个用表映射的类,在我的例子中是声明式的,我想从这个类中发现"表属性、列、名称、关系:
I have a class mapped with a table, in my case in a declarative way, and I want to "discover" table properties, columns, names, relations, from this class:
engine = create_engine('sqlite:///' + databasePath, echo=True)
# setting up root class for declarative declaration
Base = declarative_base(bind=engine)
class Ship(Base):
__tablename__ = 'ships'
id = Column(Integer, primary_key=True)
name = Column(String(255))
def __init__(self, name):
self.name = name
def __repr__(self):
return "<Ship('%s')>" % (self.name)
所以现在我的目标是从Ship"类从另一段代码中获取表列及其属性.我想我可以使用检测来处理它,但是 SQLAlchemy API 是否提供了任何方法?
So now my goal is from the "Ship" class to get the table columns and their properties from another piece of code. I guess I can deal with it using instrumentation but is there any way provided by the SQLAlchemy API?
推荐答案
您需要的信息可以从 表 对象:
Information you need you can get from Table object:
Ship.__table__.columns
将为您提供栏目信息Ship.__table__.foreign_keys
将列出外键Ship.__table__.constraints
、Ship.__table__.indexes
是您可能会觉得有用的其他属性
Ship.__table__.columns
will provide you with columns informationShip.__table__.foreign_keys
will list foreign keysShip.__table__.constraints
,Ship.__table__.indexes
are other properties you might find useful
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