TypeError: The view function ..... or WSGI callable, but it was a U12.

class U12(db.Model):

__table_args__ = {'extend_existing': True}

__table__ =db.Table('usser1234',db.metadata,db.Column('id',db.String(11), primary_key=True),

db.Column('country', db.String(20), default=None, nullable=False, comment="国家"),

db.Column('name', db.String(20), default=None, nullable=False, comment="用户姓名"),

db.Column('phone', db.String(20), default=None, nullable=False, comment="电话"))

def b(self):

pass

# def http_requests(self):

def select(self,u_id):

result = db.session.query(self).filter(self.id == u_id).first()

return result #这是报错的出处

解决方法一：

return result.name

解决方法二：

return result 'name:{0}'.format(result.name)