以编程方式访问 sqlalchemy 外键关系信息

Question

I'm trying to build tests for flask-sqlalchemy models to confirm they match the tables in the database. Using reflection, I can get the db tables, columns, and foreign keys. With the models I know how to check tablename and column names, but I can't figure out how to see the defined foreign key relationships programatically.

Model example:

class Example(db.Model):
    __table_args__ = {'schema': 'defined_schema'}
    __tablename__ = 'example'

    id =          db.Column(db.BigInteger, primary_key=True)
    name =        db.Column(db.String)
    info =        db.Column(db.BigInteger, db.ForeignKey(Info.id))
    descr =       db.Column(db.String)

Given a Model m, I've tried:

dir(m)
m.__dict__

Answer 1

使用sqlalchemy.inspect(model).columns.foreign_keys和一些字符串操作，我能够将模型外键关系与数据库中的关系进行比较